A system of pulleys is used to lift an elevator carrying a 3,300-newton load. Assuming the pulley system is nearly friction-free, approximately how far would 10,000 joules of energy lift the elevator
Answers
10,000 joules of energy would lift the elevator a distance of 3.03 meters in the given pulley system.
Given,
Work = 10,000 joules
Force = 3,300 newtons
The work done against gravity can be calculated using the equation:
Work = Force × Distance × cos(θ)
Distance = Work / (Force × cos(θ))
Distance = 10,000 J / (3,300 N × cos(0))
Since cos(0) is equal to 1, the equation simplifies to:
Distance = 10,000 J / 3,300 N
Distance = 3.03 meters
Therefore, 10,000 joules of energy would lift the elevator a distance of approximately 3.03 meters in the given pulley system.
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Related Questions
an airplane accelerates at a constant speed at 30m/s2
Answers
Now that s=u*t+at2 is being used, s =0*+302 equals 300 m. For instance, if the plane was travelling at 300 m/s2, its final velocity before it took off was 30 m/s2.
What does the term mean when an aeroplane is travelling at a fixed speed?If there isn't a net force exerted on the item that would cause it to accelerate, there is constant velocity. Drag and thrust are the two primary forces affecting the forward motion of an aeroplane.
when a plane is travelling at a constant speed on a level, straight path?The lift and push produced by an aeroplane while it is travelling level and straight at a steady velocity balance its weight and drag, respectively. Yet, as the aircraft climbs and descends, speeds up or slows down, and turns, the balance of forces varies.
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Liquid ammonia flows through a pipe at a mass flow rate of 100
kg/s .
If the cross-sectional area of the pipe is 0.01
m^2, determine the flow rate of momentum through the
pipe.
Answers
The momentum flow rate through the pipe carrying liquid ammonia is 1 × \(10^6\) kg·m/s.
The flow rate of momentum (Ṁ) through the pipe can be calculated by multiplying the mass flow rate (ṁ) by the velocity (v). The speed can be determined using the equation v = ṁ / (ρA), where ρ is the density of the liquid ammonia and A is the pipe's cross-sectional area.
Given:
ṁ = 100 kg/s
A = 0.01 m²
Assuming the density (ρ) of liquid ammonia is 700 kg/m³, we can calculate the velocity (v):
v = ṁ / (ρA)
v = 100 kg/s / (700 kg/m³ × 0.01 m²)
v = 10000 m/s
Now, we can calculate the flow rate of momentum (Ṁ):
Ṁ = ṁv
Ṁ = 100 kg/s × 10000 m/s
Ṁ = 1 × \(10^6\) kg·m/s
Therefore, the momentum flow rate through the pipe is 1 × \(10^6\) kg·m/s.
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what is one important idea from common sense
Answers
Explanation:
i think this is the answer
when you apply 1.5 V across unknown ohmic resistor you observe current of 1.5 mA. You expect to observe current of _____ mA when you apply 3 V across the same resistor.
0.3 mA
3 m A
30 mA
300 mA
Other:
Answers
Answer:
answer is 3mA
Explanation:
since V=IR
and 1.5v=1.5mA x 1ohms
definitely
it's gonna be directly proportional
means 3v=3mA
What is the weight (w) of the water displaced by the aluminum test object?
Choose one : 4.9 N
9.8 N
49 N
98 N
Answers
Option 4.9 N is correct.
The weight (w) of the water displaced by the aluminum test object is 4.9 N.
How to calculate the weight of water displaced by an object? The weight of water displaced by an object can be calculated using Archimedes’ principle, which states that the weight of a liquid displaced by an object is equal to the buoyant force acting on the object. When an object is placed in a liquid, it experiences a buoyant force that is equal to the weight of the liquid displaced by the object.
Buoyant force = weight of displaced liquid Using the given options, we can calculate the weight of water displaced by the aluminum test object and match it with the answer. The mass of the aluminum object is 0.5 kg and its volume is 0.0001 m3. We know that the density of water is 1000 kg/m3 and the acceleration due to gravity is 9.8 m/s2.
Therefore, the weight of water displaced by the aluminum test object is given by: w = mg = ρVg = 1000 x 0.0001 x 9.8 = 0.98 N = 4.9 N (divided by 2 since only half the object is submerged)Therefore, the weight (w) of the water displaced by the aluminum test object is 4.9 N.
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What is the spring constant (k) of the mass-spring system?
Answers
The spring constant (k) of a mass-spring system is a measure of the stiffness of the spring
What is spring constant?A mass-spring system's spring stiffness is indicated by the spring constant (k).
It is measured in newtons per meter (N/m) and is defined as the force necessary to stretch or compress the spring a specific distance.
The spring's material and geometry dictate its spring constant, which is normally a fixed value for any individual spring.
The formula for the spring constant is F = kx,
where
x = the distance the spring is stretched or compressed from its equilibrium position
F = the force applied to the spring.
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The Figure 6A-2 Stüve diagram includes lines representing the adiabatic processes of dry (unsaturated) and saturated air. Click on Figure 6A-2 to print or draw on it digitally. Figure 6A-2. Vertical atmospheric (Stüve) chart with adiabats. On the Stüve diagram, the solid, straight green lines from upper left to the lower right represent the dry adiabatic lapse rate: the temperature change of an unsaturated air parcel undergoing vertical motion in the atmosphere. The dashed, curved blue lines from upper left to lower right represent the temperature change of saturated air undergoing vertical motion, the saturated adiabatic lapse rate. Locate an air parcel with a temperature of 17
∘
C and a pressure of 1000mb by placing a dot on the chart on the 1000mb horizontal line where 17
∘
C would occur. 7. If this air rises as unsaturated (dry) air from 1000mb, determine its temperature at 500mb by following the solid, straight green dry adiabatic lapse rate line from the starting point, up to 500mb. At 500mb, the temperature of the unsaturated air parcel is about
∘
C. a. −5 b. −35 c. −45 8. If this air rises as saturated air from 1000mb, determine its temperature at 500mb by following the dashed, curved blue saturated adiabatic lapse rate line passing from the starting point up to 500mb. At 500mb, the saturated air parcel's temperature is approximately
∘
C. a. −15 b. −25 c. −35 9. At 500mb, the temperature of the unsaturated air parcel is the temperature of the saturated air parcel. a. lower than b. the same as c. higher than 10. This comparison demonstrates that rising unsaturated, clear air cools than rising saturated, cloudy air over the same pressure change. a. less b. more
Answers
When an air parcel rises from 1000mb to 500mb, unsaturated air cools to around -35°C, while saturated air cools to approximately -25°C.
On the Stüve diagram, the solid, straight green lines represent the dry adiabatic lapse rate, which indicates the temperature change of an unsaturated air parcel undergoing vertical motion in the atmosphere. The dashed, curved blue lines represent the temperature change of saturated air undergoing vertical motion, known as the saturated adiabatic lapse rate.
To determine the temperature of the air parcel at 500mb when it rises as unsaturated air, we follow the solid, straight green dry adiabatic lapse rate line from the starting point (17°C, 1000mb) up to 500mb. Following this line, we find that at 500mb, the temperature of the unsaturated air parcel is approximately -35°C.
On the other hand, if the air parcel rises as saturated air, we follow the dashed, curved blue saturated adiabatic lapse rate line from the starting point (17°C, 1000mb) up to 500mb. By following this line, we determine that at 500mb, the temperature of the saturated air parcel is approximately -25°C.
Comparing the temperatures of the unsaturated and saturated air parcels at 500mb, we find that the temperature of the unsaturated air parcel (-35°C) is lower than the temperature of the saturated air parcel (-25°C). Therefore, at 500mb, the temperature of the unsaturated air parcel is lower than the temperature of the saturated air parcel.
This comparison demonstrates that rising unsaturated, clear air cools more than rising saturated, cloudy air over the same pressure change.
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A dart with a mass of 0.6 kg is thrown at 10.8 m/s and sticks into a 1.9 kg apple hanging
on a string. What is the velocity of the dart and apple just after the dart is embedded?
Answers
The x component of the center of mass's velocity vector cannot change since the overall momentum is conserved. Consequently, the apple's and dart's velocity is 5 m/s.
What is the speed of the apple and dart right after the dart has pierced it?Equation 1: According to the equation of conservation of momentum, mu+m'u' = V(m+m')
Where m is the dart's mass, m' is the apple's mass, u is the dart's initial velocity, u' is the apple's initial velocity, and V is the dart and apple's subsequent velocity after becoming embedded.
Making V the equation's object,
V = (mu + m'u ) / (m + m )
Given: u = 15 m/s, u' = 0 m/s, m = 50 g = 0.05 kg, m' = 100 g = 0.1 kg ( at rest)
Replace in equation 2
V = (0.05×15+0.1×0)/(0.05+0.1)
V = 0.75/0.15
V = 5 m/s.
Consequently, the apple's and dart's velocity is 5 m/s.
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Introduction to Physical Science: Tutorial and Asking Questions
This activity will help you meet these educational goals:
. You will ask questions to identify and clarify evidence for an argument.
. You will apply scientific principles to design a process.
Directions
Read the instructions for this self-checked activity. Type in your response to each question, and check your answers. At the end
of the activity, write a brief evaluation of your work.
Activity
Spend time observing or thinking about events that involve matter and energy. Which events can you explain? Which
events can't you explain? Now answer the following questions.
Part A
Describe three events that you cannot explain.
BIUX X₂ 15px
AVA
Space used (includes formatting): 0/15000
26 of 40
行 ≡ ≡ V 田
Submit
Save
Answers
Energy and matter are both conserved within natural processes. It follows that while energy and matter can adopt different forms, they cannot be produced or extinguished. Different types of matter and energy can combine, and energy and matter frequently cycle within a system.
Explain energy.
Energy is the ability to perform tasks. It could appear in numerous different forms, such as potential, kinetic, thermal, electrical, chemical, nuclear, etc. Additionally, there is heat and work, which is energy being transferred from one entity to another.
The most important source of chemical energy for sustaining life is found in food. The three states of matter—liquid, solid, and gas—are essential because matter and energy move in concert along food networks.
An ice cube composed of water, for instance, changes into liquid water when you add energy, and when you add even more energy, it turns into steam. The type of matter and the quantity of matter are the same as in the original cube, but the level of energy may be higher or lower.
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1. Which of the following types of energy is
potential energy? More than one answer is
possible,
A kinetic energy
B.thermal energy
C.sound energy
D.gravitational energy
Answers
Answer:
Potential energy is stored energy and the energy of position––gravitational energy. There are several forms of potential energy. Electrical Energy is the movement of electrical charges. Everything is made of tiny particles called atoms.
by moving the screen only, change the pattern so you can see only the wide interference pattern. is the pattern you see now the single slit pattern or the double slit pattern? how can you tell?
Answers
If you move the screen only, you will not see any interference pattern on the screen. The interference pattern is created by the diffraction of light through the two slits. When the screen is moved, the distance between the slits and the screen changes, and the interference pattern disappears.
To tell if you are seeing the single slit or the double slit pattern, you can look at the interference pattern on the screen. If you are seeing a pattern of bright and dark fringes on the screen, you are seeing the double slit pattern.
This pattern is characteristic of wave interference and is produced when the light passes through two closely spaced slits. On the other hand, if you do not see any interference pattern on the screen, you are seeing the single slit pattern. This pattern is characteristic of wave diffraction and is produced when the light passes through a single slit.
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An 85.0-N crate of apples sits at rest on a ramp that runs from the ground to the bed of a truck. The ramp is inclined at 28.0° to the ground. A) The interaction partner of this normal force has what magnitude and direction? B) The normal and frictional forces are perpendicular components of the contact force exerted on the crate by the ramp. What is the magnitude and direction of the contact force?
Answers
Answer:
A 75.1 N and a direction of 152° to the vertical.
B 85.0 N at 0° to the vertical.
Explanation:
A) The interaction partner of this normal force has what magnitude and direction?
The interaction partner of this normal force is the component of the weight of the crate perpendicular to the ramp. It has a magnitude of 85cos28° = 75.1 N and a direction of 180° - 28° = 152° to the vertical(since it is directed downwards perpendicular to the ramp).
B) The normal and frictional forces are perpendicular components of the contact force exerted on the crate by the ramp. What is the magnitude and direction of the contact force?
Since this force has to balance the weight of the crate, its magnitude is 85.0 N. Its direction has to be vertically opposite to that of the weight.
Since the weight is 180° to the vertical (since it is directed downwards), this force is 0° to the vertical.
So, this force has a magnitude of 85.0 N and a direction of 0° to the vertical.
Which of the following is the correct equation we get
when we rearrange a = b *c so that c is by itself on the
right side of the equals sign?
Oa=c
O a + b = c
O a/buc
O a*b = c
Answers
Answer:
\(\frac{a}{b}=c\) which agrees with the third answer in your list of answer options
Explanation:
Start with:
\(a=b\,*\,c\)
divide both sides by b to isolate c on the right:
\(\frac{a}{b} =\frac{b\,*\,c}{b} \\\frac{a}{b} =c\)
You leave Chicago, Illinois at 8am and fly to Portland, Oregon. Your flight takes 2.5 hours. What time do you arrive in Portland?
Answers
Answer:
10:30am ........................
Answer:
maybe around 10:30 I would say
A hippopotamus laying on the rock exerts 10,000 N on the rock. The rock has a mass of
2 tons. How much work is being done? Be sure to show your work.
Answers
Answer:
Explanation:
If the hippo is laying on the rock, I'm assuming that there is no movement going on at all, in either the hippo or the rock. If no movement occurs, there is no work being done.
as the temperature of a volume of air increases, the air molecules move faster, making them more tightly packed and thus increasing the air's density. true or false
Answers
As the temperature of a volume of air increases, the air molecules move faster, making them more tightly packed and thus increasing the air's density. false
As the temperature of a volume of air increases, the air molecules move faster, which causes them to spread out and occupy a larger volume. This decrease in the air's density is due to the fact that the pressure of the gas is determined by the number of gas molecules present in a given volume, and an increase in temperature reduces the number of molecules per unit volume, resulting in a decrease in density.
This relationship is described by the ideal gas law, which states that the pressure of a gas is inversely proportional to its volume, and directly proportional to its temperature and the number of molecules present.
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False. The air molecules move more quickly when the temperature of a volume of air rises, which causes them to spread out more and decrease the density of the air.
The mass of a gas's molecules and how tightly they are packed affect the gas' density. The average kinetic energy of a gas's molecules rises as its temperature rises, which causes the molecules to move faster and farther away from one another. This indicates that the density of the gas is decreasing since there are less molecules present in a given amount of gas. On the other hand, as a gas's temperature drops, its molecules move more slowly and pack closer together, increasing the gas' density.
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A student designed an experiment to show how water is recycled through the atmosphere. The steps of the experiment are shown below. Boil 500 mL of water in a beaker. Hold a hot glass plate a few inches above the beaker with a pair of tongs. Observe water droplets on the glass plate. The student did not see water dripping off the glass plate as expected because the experiment had a flaw. Which of these statements best describes a method to correct the flaw in this experiment?
Hold the glass plate closer to the beaker.
Boil the water in a pan instead of a beaker.
Take more than 500 mL of water in the beaker.
Use a cold glass plate instead of a hot glass plate.
Answers
The flaw in the experiment on water recycling is that the student did not see water dripping off the glass plate as expected. To correct this flaw, the student should use a cold glass plate instead of a hot glass plate.
The correct option to the given question is option 4.
When the student holds the hot glass plate above the beaker, the water vapor in the atmosphere will come into contact with the cold surface of the plate and condense, forming water droplets. However, if the glass plate is already hot, it will not be able to cool down the water vapor quickly enough for condensation to occur.
By using a cold glass plate, the temperature difference between the plate and the water vapor will be greater, allowing for faster condensation. This will result in water droplets forming on the glass plate and dripping off, demonstrating the process of water recycling through the atmosphere.
Therefore, the correct method to correct the flaw in this experiment is to use a cold glass plate instead of a hot glass plate. This will enable the student to observe water droplets on the glass plate as expected.
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When a person blacks out, their hippocampus is unable to:
answer choices
a. record new memories
b. control muscular movement
c. keep them from making embarrassing decisions
d. regulate their blood pressure
Answers
When a person blacks out, their hippocampus is unable to record new memories.
In a region of the brain known as the hippocampus, our brain retains a short-term memory of the experience. Later, the memories are consolidated, or moved to a different region of the brain, where they will be stored for a longer period of time.
Alzheimer's disease normally starts by destroying neurons and the connections between them in the cortex and hippocampus, two regions of the brain essential in memory.
Later, it has an impact on the parts of the cerebral cortex that control language, thought, and social interaction. The majority of short-term memory is kept in the frontal lobe of the cerebral cortex.
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(URGENT- Due today.)
Can someone please help me out with this? I always give 5 star rating and brainliest to the first answer. Thanks
Answers
Answer:
\(I=\sqrt{} \frac{P}{R}\)
Explanation:
A force F = (3i+ 7j+ 47)N acts on a 2.00 kg mobile object that moves from an initial
position of d, = (3i- 2j+5k) m to a final position of de = (-5î + 4j+7k) m in 4.00 s. Find
(a) the work done on the object by the force in the 4.00 s interval, (b) the average power
due to the force during that interval.
Answers
(a) The work done on the object by the force in the 4.00 s interval is 342 J.
(b) The average power due to the force during that interval is 86 W.
(a) To find the work done, we use the formula: W = F · d, where W is the work done, F is the force vector, and d is the displacement vector. Given F = (3i + 7j + 47) N and the displacement vector d = (-5i + 4j + 7k) m, we can calculate the dot product as follows:
W = (3 * -5) + (7 * 4) + (47 * 7)
W = -15 + 28 + 329
W = 342 J
Therefore, the work done on the object by the force in the 4.00 s interval is 342 J.
(b) Average power is given by the formula: P = W / t, where P is the average power, W is the work done, and t is the time interval. We already know the work done W = 342 J, and the time interval t = 4.00 s. Substituting these values into the formula, we can find the average power:
P = 342 J / 4.00 s
P = 85.5 W
Hence, the average power due to the force during the 4.00 s interval is 85.5 W, which can be rounded to 86 W.
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A toyota prius can go from 0 m/s to 30 m/s in 15 s. What is
its acceleration?
Select one:
2 m/s2
15 m/s2
30 m/s2
450 m/s2
Answers
Answer:
2m/s2
Explanation:
using v=u+at
a=(v-u)/t
=(30-0)/15
=2
Which statement is accurate about mass or weight?
Mass can be measured in newtons.
Weight can be measured in pounds.
A bowling ball has the same mass as a golf ball.
Objects have the same weight regardless of where they are.
Answers
Answer:
Wright can be measured in pounds
Explanation:
Mass is the quantity of matter a body contains while weight is the measure of mass of a body. Weight is the product if mass and the acceleration due to gravity of a body.
If the mass of an object is known, we can determine the equivalent weight of such object and vice versa using the relationship W = mg
m is the mass if the object (in kg)
W is the weight
g is the acceleration due to gravity
g can be measured both on metre/seconds or lb/ft². This means that the weight of an object can be measured in both kgm/s² (Newton) and lb(pounds).
Also note that different object have different masses hence it is not always true to say that a bowling ball has the same mass as a golf ball.
Based on the explanation above, it can be concluded that Weight can be measured in pounds which gives the only correct statement.
Answer:
Weight can be measure in pounds
Explanation:
Explain Earth and the
other terrestrial planets are
much smaller, denser, and less
massive than the outer planets, and
they are composed of silicate rock
and metal rather than gases and
ices. What does this tell you about
Earth's early history?
Answers
Answer:
Explanation:
A train stops at two stations A and B. It accelerates from rest from station A to a speed of 144 km h^-1 in 3 minutes and maintains this speed for 10 minutes. It then decelerates for 2 minutes and comes to rest at station B. Find the total distance between A and B.
Show work please, really need the help.
Answers
Answer:
The total distance between A and B is 30 km
Explanation:
The given information are;
The time duration of the acceleration of the train from station A = 3 minutes = 0.05 hours
The speed attained by the train after the acceleration = 144 km/h
The time duration the train maintains the speed = 10 minutes = 0.1\(\bar 6\) hours
The time duration in which the train decelerates to station B = 2 minutes = 0.0\(\bar 3\) hours
The equation of motion required are;
The initial acceleration, a = (144 - 0)/0.05 = 2,880 km/h²
The distance covered, s = u·t + 1/2·a·t²
Where;
u The initial velocity = 0
∴ s₁ = 0 × 0.05 + 1/2 × 2880 × 0.05² = 3.6 km
s₁ = 3.6 km
The distance, s₂ the train covers at the constant speed 144 km/h for 10 minutes (1/6 hours) is given as follows;
s₂ = Velocity Time = 144 × 1/6 = 24 km
s₂ = 24 km
The deceleration, a₂ that brings the train to a stop in 2 minutes (1/30 hours) is given as follows;
a₂ = (0 - 144)/(1/30) = -4320 km/h²
The distance covered, s₃ by the train as it decelerates to rest from the initial constant speed is given as follows;
s₃ = u·t + 1/2·a·t²
Where;
u = The initial velocity =144 km/h
We have;
s₃ = 144×1/30 - 1/2 × 4320 × (1/30)² = 2.4
s₃ = 2.4 km
The total distance between A and B, s = s₁ + s₂ + s₃ = 3.6 + 24 + 2.4 = 30 km
The total distance between A and B = 30 km.
Joe and Bob are engineers responsible for heating 3 liters of air starting from atmospheric pressure (100 kPa ) and 20 ∘C to 50 ∘C. Joe thinks it would be best to heat up the air inside of an air-tight, rigid box. Bob thinks it would be better to heat up the air inside of a weighted piston-cylinder device. Answer the following questions: 1. What is the final pressure inside of Joe's rigid box? 2. How much heat transfer is necessary to complete each process (Joe's and Bob's)? Which process requires less heat transfer? 3. What heating power (Watts) will be required for each process if the entire process must be complete in one minute?
Answers
1. In Joe's rigid box, the final pressure inside will remain the same as the initial atmospheric pressure, which is 100 kPa. The rigid box does not allow for any volume change, so the pressure remains constant throughout the heating process.
2. To determine the heat transfer required for each process, we can use the first law of thermodynamics, which states that the change in internal energy (ΔU) of a system is equal to the heat transfer (Q) into the system minus the work (W) done by the system.
ΔU = Q - W
For Joe's process in the rigid box, since the volume remains constant, there is no work done (W = 0). Therefore, the heat transfer required (Q) can be calculated as:
Q = ΔU
For Bob's weighted piston-cylinder device, the volume can change, and work is involved in moving the piston against the external pressure. The work done can be calculated using the equation:
W = PΔV
Where P is the pressure and ΔV is the change in volume.
The heat transfer required (Q) for Bob's process can be calculated as:
Q = ΔU + W
To determine which process requires less heat transfer, we need to compare the values of Q for Joe's and Bob's processes.
3. To calculate the heating power (Watts) required for each process, we need to know the time required for the entire process to be completed. Let's assume the entire process must be completed in one minute (60 seconds).
The heating power (P) can be calculated using the equation:
P = Q / t
Where Q is the heat transfer and t is the time taken.
By calculating the heat transfer (Q) for each process and dividing it by 60 seconds, we can determine the heating power required for Joe's and Bob's processes.
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ANSWER ASAP What happens to a circuit’s resistance (r) , voltage (v) , and current (l) when you decrease the length of the wire in the circuit ?
A . R decreases
V constant
l increases
B . R constant
V increases
l increases
C . R increases
V constant
l decreases
D . R increases
V decreases
I decreases
Answers
Answer:A
Explanation:i just took the test
Which would produce the most energy in a single reaction?
(a)The fission reaction associated with uranium-235.
(b)The fusion reaction of the Sun (two hydrogen nuclei fused to one helium nucleus).
(c)Both (a) and (b) are about the same.
(d)Need more information.
Answers
(b) The fusion reaction of the Sun (two hydrogen nuclei fused to form one helium nucleus) would produce the most energy in a single reaction.
Fusion reactions, such as the one occurring in the Sun, release an enormous amount of energy. In this process, the nuclei of light atoms, such as hydrogen isotopes, combine to form a heavier nucleus, releasing a tremendous amount of energy in the process. This energy is the result of the conversion of mass into energy, as described by Einstein's famous equation, E=mc².
Fusion reactions are responsible for the energy generated by stars, including our Sun. The fusion of hydrogen nuclei to form helium in the Sun's core releases a significant amount of energy that sustains the Sun's radiative output. This energy is the primary source of light and heat that we receive from the Sun.
In contrast, the fission reaction associated with uranium-235, option (a), also releases a significant amount of energy but is generally less efficient and produces less energy compared to fusion reactions. Fission involves the splitting of heavy atomic nuclei, such as uranium-235, into two or more smaller nuclei, releasing energy in the process. While fission reactions are used in nuclear power plants and atomic bombs, they generally require a larger amount of fuel and generate less energy compared to fusion reactions.
Therefore, the fusion reaction of the Sun (option b) is the reaction that produces the most energy in a single reaction.
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Which scenario is an example of a physical change?
Answers
Answer: lead is melted into a liquid to form pellets
Explanation:You didn’t add the answers to the questions but this question was on my test
For your assigned element provide:
1. Atomic Symbol
2. Atomic Number
3. Atomic Mass (round to nearest whole number).
4. # of protons
5. # of electrons
6. Average # of neutrons
Answers
Element: Iron (Fe)
1. Atomic Symbol: Fe
2. Atomic Number: 26
3. Atomic Mass: 56 (rounded to the nearest whole number)
4. Number of Protons: 26
5. Number of Electrons: 26
6. Average Number of Neutrons: 30
Iron (Fe) has an atomic symbol Fe, an atomic number of 26, and an atomic mass of 56 (rounded to the nearest whole number). It contains 26 protons and 26 electrons. On average, iron has 30 neutrons in its nucleus.
Iron is a chemical element with the symbol Fe and atomic number 26. Its atomic mass is approximately 56, which is the sum of the protons and neutrons in its nucleus. Iron has 26 protons, which determine its atomic number and uniquely identify it as iron.
The number of electrons in an atom is equal to the number of protons, so iron also has 26 electrons. Neutrons, on the other hand, contribute to the mass of the atom without affecting its chemical properties.
The average number of neutrons in iron is approximately 30, calculated by subtracting the atomic number (protons) from the atomic mass (rounded to the nearest whole number). Iron is a common element found in the Earth's crust and is known for its strength, versatility, and role in various biological processes.
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Question #2 What happens to some metals when the kinetic energy of their particles is decreased? A. they melt? B. they conduct? C. they expand it? D. they contract ? I NEED HELP FAST PLS
Answers
Some metals when the kinetic energy of their particles is decreased.
Hence, the correct option is D.
When the kinetic energy of the particles in a metal is decreased, it means that the particles are moving slower and have less energy. This can have a number of effects on the metal, depending on the specific properties of the metal.
A) Melting occurs when a solid substance is heated to a temperature where it becomes a liquid. A decrease in kinetic energy of particles is unlikely to cause melting of a metal.
B) Metals are good conductors of electricity due to the mobility of their electrons. A decrease in kinetic energy may not affect the metal's ability to conduct electricity, unless it affects the number of free electrons in the metal.
C) Most metals expand when they are heated and contract when they are cooled. However, a decrease in kinetic energy of particles in a metal may not cause it to expand.
D) Most metals contract when they are cooled.
Therefore, a decrease in kinetic energy of particles in a metal could lead to contraction of the metal.
Hence, the correct option is D.
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