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Newton's Second Law of Motion states that the force produced by an engine is equal to the mass of the rocket times its acceleration. The greater the force produced by the engine, the greater the acceleration of the rocket.
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what would be the noontime altitude of the sun at the time of the summer solstice?
The highest angle, which is 23.5°, occurs at the summer solstice. The greatest altitude angle at midday is therefore 90° 40° + 23.5° Equals 73.5°.
What is the summer solstice's noon sun angle?On the solstice, the sun's angle at noon lowers by 1 degree for every point of latitude that is moved away from 23.5o. On the summer, the sun's angle at noon lowers by 1 degree for every point of latitude that is moved away from 23.5o.
What is the summertime sun's altitude?Every day of the year, including the solstices, is the same duration of 12 hours. arcs of the solstices as seen from 20° latitude. The Sun reaches its highest point at 46.56° in the winter and 93.44° in the summer.
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Nuclear fusion combines nuclei to form: lighter elements heavier elements
Answer:
The answer is
heavier elementsHope this helps you
Answer:
B. heavier elements
Explanation:
What does the "coefficient of friction" tell you?
Which statement correctly describes plastic?
A. It has a low resistivity and allows charges to move freely.
B. It has a high resistivity and prevents charges from moving freely.
C. It has a high resistivity and allows charges to move freely.
D. It has a low resistivity and prevents charges from moving freely.
Answer:answer is B
Explanation:
List 4 forms of energy
Answer:
Chemical energy is energy stored in the bonds of atoms and molecules. ...
Mechanical energy is energy stored in objects by tension. ...
Nuclear energy is energy stored in the nucleus of an atom—the energy that holds the nucleus together. ...
Gravitational energy is energy stored in an object's height.
Answer:
Nuclear power
Electricity
Mechanic
Gravity
Explanation:
A frictionless piston-cylinder device as shown in Figure Q4 contains 7.5 liters of saturated liquid water at 275kPa. An electric resistance is installed in it and is being turned on until 3050 kJ of energy is transferred to the water. Assume the piston-cylinder device is well insulated, determine i) the mass of water, kg, ii) the final enthalpy of water, k J/kg, iii) the final state and the quality (x) of water, iv) the change in entropy of water, kJ/kg, and v) whether the process is reversible, irreversible, or impossible. Sketch the process on P−v diagram with respect to the saturation lines.
A frictionless piston-cylinder device contains 7.5 liters of saturated liquid water at 275 kPa. An electric resistance is turned on until 3050 kJ of energy is transferred to the water.
i) The mass of water can be determined by using the specific volume of saturated liquid water at the given pressure and volume. By using the specific volume data from the steam tables, the mass of water is calculated to be 6.66 kg.
ii) To find the final enthalpy of water, we need to consider the energy added to the water. The change in enthalpy can be calculated using the energy equation Q = m(h2 - h1), where Q is the energy transferred, m is the mass of water, and h1 and h2 are the initial and final enthalpies, respectively. Rearranging the equation, we find that the final enthalpy of water is 454.55 kJ/kg.
iii) The final state and the quality (x) of water can be determined by using the final enthalpy value. The final enthalpy falls within the region of superheated vapor, indicating that the water has completely evaporated. Therefore, the final state is a superheated vapor and the quality is 1 (x = 1).
iv) The change in entropy of water can be obtained by using the entropy equation ΔS = m(s2 - s1), where ΔS is the change in entropy, m is the mass of water, and s1 and s2 are the initial and final entropies, respectively. The change in entropy is found to be 10.13 kJ/kg.
v) The process described is irreversible because the water started as a saturated liquid and ended up as a superheated vapor, indicating that irreversibilities such as heat transfer across a finite temperature difference and friction have occurred. Therefore, the process is irreversible.
On a P-v diagram, the process can be represented as a vertical line from the initial saturated liquid state to the final superheated vapor state, crossing the saturation lines.
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A traffic light could be suspended from a rigid horizontal beam, as shown. Let P be a pivot, so the beam can be raised and lowered. Then a strong cable is required to keep the traffic light in equilibrium when the beam is horizontal. Calculate the tension force in the cable.
M= mass of the traffic light = 105 kg (mass of the beam = 0kg)
L= length of the beam = 6.2 m
d= distance from P to the of the vertical pole = 1.8 m
The tension force in the cable is approximately 1773.82 N.
To calculate the tension force in the cable, we can use the principle of moments. Moments are the rotational force acting on an object, and when an object is in equilibrium, the sum of the clockwise moments equals the sum of the counter-clockwise moments.
First, let's find the gravitational force acting on the traffic light:
Fg = mass x gravity = 105 kg x 9.81 m/s² = 1030.05 N (approximately)
Now, let's consider the moments about point P. There are two forces acting on the beam: the gravitational force of the traffic light and the tension force in the cable. The gravitational force acts downward at the midpoint of the beam (L/2) and the tension force acts upward at the end of the beam (L).
The moment due to the gravitational force (Fg) is counter-clockwise, and the moment due to the tension force (T) is clockwise. To find the tension force, we will equate the moments:
Fg x (L/2) = T x d
We know Fg, L, and d, so we can plug in the values:
1030.05 N x (6.2 m / 2) = T x 1.8 m
Solving for T, we get:
T = (1030.05 N x 3.1 m) / 1.8 m = 1773.82 N (approximately)
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1. 300 meters convert by 1 mile
2. 65 minutes convert by 1 hour
3. 35 yards convert by 1 meter
(show solution)
300 meters = 0.186411 miles, 65 minutes = 1.08333 hours, 35 yards = 32.004 meters
1. To convert 300 meters to miles, you can use the conversion factor 1 mile = 1609.344 meters. So, 300 meters = 300/1609.344 miles = 0.186411 miles.
2. To convert 65 minutes to hours, you can use the conversion factor 1 hour = 60 minutes. So, 65 minutes = 65/60 hours = 1.08333 hours.
3. To convert 35 yards to meters, you can use the conversion factor 1 yard = 0.9144 meters. So, 35 yards = 35*0.9144 meters = 32.004 meters.
In summary:
300 meters = 0.186411 miles
65 minutes = 1.08333 hours
35 yards = 32.004 meters
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A force of 9 N is applied to an object. The moment arm for the force is 0. 21 m. What is the torque produced by the force?
The work done on the object by the applied force is 1500 J, and the power developed is 8000 W.
The torque produced by the force can be determined by multiplying the force by the moment arm. This can be represented using the formula:Torque = Force × Moment armGiven that a force of 9 N is applied to an object with a moment arm of 0.21 m, the torque produced by the force can be calculated as follows:Torque = 9 N × 0.21 m= 1.89 N·mTherefore, the torque produced by the force is 1.89 N·m.Answer in 200 words.Torque is the tendency of a force to rotate an object around an axis or pivot. The torque produced by a force is proportional to the force applied and the moment arm.The moment arm is the shortest distance between the line of action of the force and the axis of rotation. It is the perpendicular distance from the axis of rotation to the line of action of the force. The moment arm is an important factor in determining the torque produced by a force.A torque of 1 N·m is produced when a force of 1 N is applied perpendicular to a moment arm of 1 m. This is known as the moment of force or the turning effect of a force.The torque produced by a force is measured in newton-metres (N·m) in the SI system of units. In order to calculate the torque produced by a force, the magnitude of the force and the moment arm need to be known.The formula for calculating the torque produced by a force is:Torque = Force × Moment armWhere torque is measured in N·m, force is measured in newtons (N), and moment arm is measured in metres (m).
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Look at the Sankey diagram for an energy saving light bulb below. What is the bulb's efficiency?
It depends on what you're using this lightbulb for.
If you're using it to illuminate your walk-in closet, then it's 75% efficient.
If you're using it to warm the basket where the newborn kittens are, then it's only 25% efficient.
11. A collection of a small group of factors that are related is known as a(n)
a. system
b. hypothesis
c. prediction
d. objective
Answer:
system
Explanation:
they are all put together as one, and they are a group
A cherry orchard currently hires 5 workers. The owner estimates that hiring an additional worker would increase cherry yields by 20 bushels per day. The price of cherries is $15 per bushel. The owner should hire the extra worker if the wage rate is no greater than:
The owner should hire the extra worker if the wage rate is no greater than $300 per day.
To determine whether hiring an additional worker is financially beneficial, we need to compare the additional revenue generated from increased cherry yields to the cost of hiring the worker. Let's calculate:
Additional cherry yield per day with one extra worker = 20 bushels per day
Price per bushel = $15
Therefore, the additional revenue generated per day with one extra worker = 20 bushels/day * $15/bushel = $300/day.
Since the additional revenue per day from hiring one more worker is $300, the owner should hire the extra worker if the wage rate is no greater than $300 per day. This is because the additional revenue of $300 per day would cover the cost of the worker's wage.
The owner should consider hiring the extra worker if the wage rate is no greater than $300 per day. At this wage rate, the additional revenue generated from the increased cherry yields would be sufficient to cover the cost of hiring the worker. However, if the wage rate exceeds $300 per day, the additional cost of the worker's wage would outweigh the additional revenue, making it economically unfavorable to hire the extra worker.
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Suppose a spectral line of hydrogen, normally at 500 nm when measured in a lab on Earth, is observed in the spectrum of a star to be at 500.3 nm. This is called a red shift because the wavelength is longer (and red is on the long-wavelength side of the visible spectrum). How fast is the star moving away from Earth? Give your answer in m/s. Hint: follow example 5.6. Compare in particular to the "Check your learning" calculation, and note that larger Δλ means larger speed.
The star is moving away from Earth at a velocity of 1.8 x 106 m/s.
The Doppler Effect describes the shift in wavelength of a wave when the source is moving in relation to the observer. The shift can be observed in sound waves, light waves, and other waves.
The Doppler Effect can be used to determine the velocity of objects moving away from an observer, as in the case of stars moving away from Earth.
The velocity of a star moving away from Earth can be determined using the equation:
v = Δλ/λ x c, Where v is the velocity of the star, Δλ is the shift in wavelength of the spectral line, λ is the wavelength of the spectral line measured in the lab on Earth, and c is the speed of light (3.00 x 108 m/s).
In this case, the shift in wavelength of the spectral line is Δλ = 500.3 nm - 500 nm = 0.3 nm.
The wavelength of the spectral line measured in the lab on Earth is λ = 500 nm.
Plugging in these values to the equation above: v = Δλ/λ x cv = (0.3 nm / 500 nm) x (3.00 x 108 m/s) = 1.8 x 106 m/s.
Therefore, velocity of star 1.8 x 106 m/s.
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Need help ASAP
Thanks+ BRAINLIST only for correct answers
4. Which of the following sets of EM radiation can harm your body cells?
a. Gamma ray, microwaves, infrared
b. Light, ultraviolet, x-ray
c. Microwaves, ultraviolet, infrared
d. Ultraviolet, x-ray, gamma ray
Answer:
the correct one is D,
Ultraviolet, x-ray, gamma ray
Explanation:
Electromagnetism radiation are waves of energy that is expressed by the Planck relationship
E = h f
where h is the plank constant and f the frequency of the radiation.
Also the speed of light is
c = λ f
we substitute
E = h c /λ
therefore to damage the cells of the body radiation of appreciable energy is needed
microwave radiation has an energy of 10⁻⁵ eV
infrared radiation E = 10⁻² eV
visible radiation E = 1 to 3 eV
radiation Uv E = 3 to 6 eV
X-ray E = 10 eV
gamma rays E = 10 5 eV
therefore we see that the high energy radiation is gamma rays, x-rays and ultraviolet light.
When checking the answers, the correct one is D
an object moving with an initial velocity of 40 m/s takes 2.0 seconds to slow to a speed of 10 m/s. what is the magnitude of the acceleration of the object?
Answer: a = -15 m/s^2
Explanation:
a = Δv/Δt
a = (10 m/s - 40 m/s)/(2.0 s)
a = -15 m/s^2
Please help!! Would greatly appreciate it!! I will mark as brainliest!!
Circumference means path covered .
In Physics Path covered means the product of speed and time .
Mathematically, P= S t
P= 25 x 10
= 250cm is the path travelled .
Now Graphically to find out the speed variation during 0 to 3 sec -
First observation is that graph is linear , so the motion is uniform acceleration. We need to find the slope of this speed time graph to resolve the rate of change of speed.
Increase in speed per sec= Slope of Graph
Mathematically, Slope of any Graph = Rise/ run
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PLEASEE HELP!!!!!!Why are the youth not getting involved in their communities and voting? How is media influencing the voters?
Answer:
because they are underaged and prob dont care and also the gov thinks that the youth cant make a reasonable decision for them selves for sum like that and the media influnces them to by saying whats going on and who supports who
A spring is stretched 0.15 m and the force was 1500 N. What is the spring constant?
The spring constant for a spring is stretched 0.15 m and the force was 1500 N is 10000.
What is spring constant?The spring constant, k, is a measure of the spring's stiffness. It varies depending on the spring and material. The greater the spring constant, the stiffer the spring and more difficult to stretch.
The letter k symbolizes the "spring constant," which is a number that tells us how "stiff" a spring is.
If k is large, it means that more force is required to stretch it a certain length than would be required to stretch a less stiff spring the same length.
We know that,
F = k(x)
Where k is the spring constant.
Here, it is given that:
F = 1500N
x = 0.15m
So,
1500 = k (0.15)
k (0.15) = 1500
k = 1500/0.15
k = 150000/15
k = 10000
Thus, the value of spring constant is 10000.
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Want in own words please
What determines whether something is solid or liquid or gas
Answer:
An object could be determined as solid:
-It doesn't change shape easily.
-when lots of heat applied till melting point, it would melt or thaw (basically turn into liquid).
-turn to pieces or bent when enough force applied to it.
-the molecules attached with each other by strong forces, creating strong bonds.
An object could be determined as liquid:
-It changes shaped based on the container.
-when lots of heat applied till boiling point, it would vaporize
-the molecules have weak bonds, creating a lot of spaces.
-when heat extracted from the liquid till freezing point, it would freeze/hardened (turn into solid)
An object could be determined as gas:
-it doesn't have any shape or form.
-if fills in the container.
-if lots of heat applied, its molecules are going to move, vibrate,and transist faster; increasing pressure and volume.
-The molecules have very weak bonds, creating spacious space.
-when the heat are being extracted till certain freezing point, it is going to turn into liquid, then solid.
What is the relationship between elevation and energy (think about the same can dropped from different heights)?
Answer: Since gravitational force is inversely proportional to the square of the separation distance between the two interacting objects, more separation distance will result in weaker gravitational forces. So as two objects are separated from each other, the force of gravitational attraction between them also decreases.
Explanation:
Galaxy A is reported to be receding from our galaxy at a speed of 0.35c. Galaxy B, located in precisely the opposite direction to Galaxy A, is also found to be receding from us at a speed of 0.35c. What recessional speed would an observer on Galaxy A find (a) for our galaxy, and (b) for Galaxy B
Answer:
Galaxy A is reported to be receding from us with a speed of 0.35c. Galaxy B, located in precisely the opposite direction, is also found
joshua is attracted toward earth by a 500 -n gravitational force. the earth is attracted toward joshua with a force of zero. 500 n. 250 n. 1000 n. none of the above
none of the above. According to Newton's third law of motion, for every action, there is an equal and opposite reaction.
In this case, if Joshua is attracted toward Earth by a 500 N gravitational force, then by Newton's third law, Earth is also attracted toward Joshua with an equal and opposite force of 500 N. The gravitational force between two objects is always mutual and equal in magnitude but opposite in direction.
Newton's third law of motion states that for every action, there is an equal and opposite reaction. This means that when an object exerts a force on another object, the second object exerts an equal and opposite force on the first object. The forces always occur in pairs and act on two different objects.
For example, if you push against a wall with a certain amount of force, the wall pushes back on you with an equal amount of force in the opposite direction. Another example is the propulsion of a rocket. The rocket pushes exhaust gases backward, and in response, the gases push the rocket forward with an equal force.
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if you touch the metal ball of a charged electroscope with your finger, will the electroscope discharge? explain
Yes, touching the metal ball of a charged electroscope with your finger will cause the electroscope to discharge. This can be explained by the process of grounding.
An electroscope is a device used to detect the presence of electric charge. It consists of a metal rod or stem with a metal ball or leaves at the top. When the electroscope is charged, either positively or negatively, the metal ball or leaves acquire the same charge.
When you touch the metal ball of the charged electroscope with your finger, which is a conductive material, you provide a path for the excess charge to flow through your body. This process is known as grounding or earthing.
As you touch the metal ball, electrons from your body can flow onto or from the electroscope, depending on the charge of the electroscope. If the electroscope is positively charged, electrons from your body will flow onto the electroscope, neutralizing the positive charge. Similarly, if the electroscope is negatively charged, electrons will flow from the electroscope to your body, neutralizing the negative charge.
By providing a conductive path, touching the electroscope with your finger allows for the redistribution of charge, ultimately resulting in the electroscope discharging. The metal ball of the electroscope becomes neutral, and any divergence of the leaves returns to their normal position.
This discharge occurs because electrons, which are negatively charged particles, move in response to the potential difference between your body and the electroscope. The excess charge on the electroscope seeks to balance itself with the charge in your body, effectively neutralizing the electroscope.
Therefore, by touching the metal ball of a charged electroscope with your finger, you provide a pathway for the charge to flow, leading to the discharge of the electroscope.
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HELP PLEASE
A load is a device that changes electrical energy into other forms of energy. Which load converts electrical energy into thermal energy by passing an electric current through a high-resistance material?
A.
Hand-powered generator
B.
Toaster
C.
Fan
D.
Electrical drill
Answer:
A toaster because you plug it up for electric energy and heat to toast it
What distance will a car traveling at a speed of 15 m/s cover in 300 s?
Distance formula: d = st
d = 15 * 300
d = 4,500m
Best of Luck!
For atoms with A 100, the binding energy per nucleon is approximately? Select the correct answer a. 6 MeV b. 7 MeV c. 9.5 MeV d. 4.5 MeV
e. 8 MeV
Binding energy refers to the energy needed to break apart a nucleus into its individual nucleons. The correct answer is c. 9.5 MeV.
Nucleons are particles found in the nucleus, which include protons and neutrons.
For atoms with A 100, the binding energy per nucleon is approximately 9.5 MeV. This means that on average, each nucleon in the nucleus of an atom with A 100 is bound to the others by 9.5 MeV of energy.
For atoms with A 100, the binding energy per nucleon is approximately 8 MeV. Your correct answer is e. 8 MeV. The binding energy is the energy required to disassemble a nucleus into its constituent nucleons (protons and neutrons). In this case, for atoms with a mass number (A) of 100, the binding energy per nucleon is approximately 8 MeV.
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Starting from 15 m/s, a certain vehicle can accelerate to 60 m/s at a rate of 6 m/s2. What time is required to make this acceleration?
Explanation:
v = u + a * t
60 = 15 + 6 * t
t = 7.5 seconds
Identify the number of electrons each of the following atoms needs to gain or lose to have a stable outer electron configuration.
sodium (Na):
strontium (Sr):
sulfur (S):
astatine (As):
A car moving with a speed of 20 m/s
applies brakes. What is the acceleration
of the car?
Explanation:
\(speed : U = 20 \: m {s}^{ - 1} \\ {V}^{2} = {U}^{2} + 2aS \\ 0 = {20}^{2} + (2 \times a \times S) \\ a = \frac{200}{S} \: m {s}^{ - 1} \)
What is the wavelength of a radio wave traveling in a vacuum that has a frequency of 6.50x107Hz?
(Choose from the following units: m, hz, m/s, s, degrees, dB)