what is the work done when a 400.n force is use to lift a 400.n object 3.5 meters strait up
Answers
Answer:
i think it's 1400
Explanation:
w = Force x displacement
w = 400 x 3.5
Related Questions
The table above shows the data that Mendel collected about the offspring of
his second set of crosses. What is the median of the number of trials he
performed?
Answers
The table above shows the data that Mendel collected about the offspring of his second set of crosses therefore the median of the number of trials he performed is 1,181 and is therefore denoted as option A.
What is Median?This is referred to as the middle number in a sorted, ascending or descending list of numbers.
In this scenario there were five trials which are 1064, 7324, 8003, 1181 and 929. When it is arranged in an ascending order we have:
929 , 1064 , 1181 , 7324 , 8003
Therefore the median number is 1181.
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A squirrel jumps into the air with a velocity of 7 m/s at an angle of 20 degrees. What is the maximum height reached by the squirrel?
Answers
Answer:
.3m
Explanation:
Apex
0.3 is right i just got it right on the test for A P E X :D
What are quotas simple definition?.
Answers
A quota is a trade restriction imposed by the government that limits the quantity of goods or the amount of money that a country may spend on them at one time for import or export.
Nations utilize quotas in international trade to regulate the volume of trade that takes place between them and other countries. A quota is a limit on the quantity of something or someone that is permitted or necessary.An import quota is a sort of trade restriction when a government places a cap on the quantity or price of a commodity that another country is allowed to bring into the country. A government may impose a quota, for instance, preventing a neighboring country from importing more than 10 tons of grain. A quota is the set limit on how much of something is legally permitted. Four tickets per person were no longer allowed; only two were now allowed.Thus this is the meaning of quota.
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A true experiment involves the identification and control of variables. What is an example of a scientific investigation that might not involve a true experiment
Answers
Answer:
Explanation:
Since the definition of true experiment has been provided in the question, let's proceed to define some other parameters.
Scientific investigation that might not involve a true experiment is called non-experimental research while the one that involves a true experiment is called experimental research.
Non-experimental researches are usually descriptive in nature. An example of a non-experimental research is the observation and recording of the number and the beak type of birds that visits a park. As seen, this experiment does not have it's variables set out for identification or even control.
Freely falling bodies can only move downward.
True
False
Answers
Answer:
true
Explanation:
hope it helps
what does the process skill measuring mean?
Answers
Answer:
Process Skills: Observing - using your senses to gather information about an object or event. It is description of what was actually perceived. using standard measures or estimations to describe specific dimensions of an object or event
Explanation:
i hope this isnt confusing
Examples:
The learner will be blind folded and make observations using the sense of touch.
The learner will create observations about a coin using the 5 senses.
The learner will mix primary colors to create more colors.
In 1912, Alfred Wegener proposed his continental drift theory and was widely rejected. Imagine if you had to assist Wegener in proving that we live on huge plates that are constantly in motion. Luckily, you also have provided resources such as videos and articles to compile your evidence and help Wegener. Present your research using an interactive PowerPoint or Storyboard while answering the below questions.
1. What does the theory of plate tectonics state?
2. What was Pangaea?
3. Why was Wegener's original idea about continental drift referred to as intuition and not science?
4. What did Wegener find that he believed was evidence to support his theory?
Evidence for plate tectonics
Research the evidence that scientists used to prove the theory that continents move.
Research rock formation evidence and give examples.
Research fossils evidence
o Research fossil evidence of the following organisms: Glossopteris, Mesosaurus, Cynognathus and Lystrosaurus. Summarize the type of organisms, their habitat and climate conditions.
5. Research evidence from glaciers and coal deposits.
Answers
Answer:
1. The theory of plate tectonics states that the Earth's outer shell is divided into several plates that move and interact with each other. These plates are made up of the Earth's crust and the upper part of the mantle, and they move due to the convection currents in the mantle.
2. Pangaea was a supercontinent that existed about 300 million years ago. It was made up of all the continents that we know today, and it began to break apart about 200 million years ago.
3. Wegener's original idea about continental drift was referred to as intuition and not science because he did not have a mechanism to explain how the continents moved. Additionally, he did not have enough evidence to support his theory.
4. Wegener found several pieces of evidence that he believed supported his theory of continental drift. He noticed that the coastlines of South America and Africa fit together like puzzle pieces, and he also found similar rock formations and fossils on both continents.
Evidence for plate tectonics:
Rock formation evidence: Scientists have found similar rock formations on different continents that were once connected. For example, the Appalachian Mountains in North America and the Caledonian Mountains in Europe have similar rock formations.
Fossil evidence: Scientists have found fossils of the same species on different continents that were once connected. For example, the Glossopteris plant was found in South America, Africa, India, Australia, and Antarctica. This suggests that these continents were once connected and had similar climates.
Glossopteris: Glossopteris was a plant that lived about 250 million years ago. It was found on several continents that were once connected, including South America, Africa, India, Australia, and Antarctica. This suggests that these continents were once connected and had similar climates.
Mesosaurus: Mesosaurus was a freshwater reptile that lived about 300 million years ago. Its fossils have been found in South America and Africa, which suggests that these continents were once connected and had similar habitats.
Cynognathus: Cynognathus was a carnivorous mammal-like reptile that lived about 250 million years ago. Its fossils have been found in South America, Africa, and Antarctica, which suggests that these continents were once connected and had similar habitats.
Lystrosaurus: Lystrosaurus was a herbivorous mammal-like reptile that lived about 250 million years ago. Its fossils have been found in South America, Africa, India, and Antarctica, which suggests that these continents were once connected and had similar habitats.
Glacier and coal deposit evidence: Scientists have found evidence of glaciers and coal deposits in areas that are now near the equator. This suggests that these areas were once located near the poles and have moved due to plate tectonics. Additionally, coal deposits found in Antarctica suggest that it was once located in a warmer climate.
if a girl is running along a straight road with uniform velocity 1.5 metre per second find the acceleration
Answers
Answer:
Acceleration is 0.
Explanation:
Since the girl is running with a uniform velocity, meaning she is moving at a constant rate, she is not accelerating. Acceleration only occurs when the speed of an object increases, decreases, or if there is a change in direction.
Cuánto demorará un cuerpo en alcanzar su máxima altura, sabiendo que fue lanzado, verticalmente hacia arriba, con una velocidad cuyo valor fue de 90 m/s?
Answers
Answer:
The maximum height reached is 413.27 m.
Explanation:
How long will it take for a body to reach its maximum height, knowing that it was thrown, vertically upwards, with a velocity whose value was 90 m / s?
initial velocity , u = 90 m/s
gravity, g = 9.8 m/s^2
Let the maximum height is h.
At maximum height the velocity v = 0
Use third equation of motion
\(v^2 = u^2 - 2 gh\\\\0 = 90\times 90 - 2 \times 9.8 \times h\\\\h = 413.27 m\)
A 87.5-kg horizontal circular platform rotates freely with no friction about its center at an initial angular velocity of 1.53 rad/s. A monkey drops a 8.75-kg bunch of bananas vertically onto the platform. They hit the platform at 4/5 of its radius from the center, adhere to it there, and continue to rotate with it. Then the monkey, with a mass of 22.1 kg, drops vertically to the edge of the platform, grasps it, and continues to rotate with the platform. Find the angular velocity of the platform with its load. Model the platform as a disk of radius 1.95 m.
Answers
The final angular velocity of the platform with the bananas and the monkey is 1.34 rad/s.
The angular momentum of the system is conserved during this process, since there are no external torques acting on the system. Initially, the platform is rotating with an angular velocity of ω1 = 1.53 rad/s. When the monkey drops the bananas onto the platform, the angular velocity of the platform and the bananas will decrease due to conservation of angular momentum.
However, the angular velocity will not change instantaneously because the bananas will stick to the platform and the system will continue to rotate as a single unit.
To find the final angular velocity of the platform with the bananas and the monkey, we can use the conservation of angular momentum:
L1 = L2
where L1 is the angular momentum of the system before the monkey and bananas are dropped onto the platform, and L2 is the angular momentum of the system after the monkey has grabbed onto the edge of the platform. We can write L1 and L2 as follows:
L1 = I1 ω1
where I1 is the moment of inertia of the platform with no monkey or bananas, and ω1 is the initial angular velocity of the platform.
L2 = I2 ω2
where I2 is the moment of inertia of the platform with the monkey and bananas, and ω2 is the final angular velocity of the platform.
The moment of inertia of a solid disk rotating about its center is given by:
I = (1/2) m r²
where m is the mass of the disk, and r is its radius. Using this formula, we can find the moment of inertia of the platform before and after the monkey and bananas are added:
I1 = (1/2) (87.5 kg) (1.95 m)² = 167.859 kg m²
I2 = (1/2) (87.5 kg + 8.75 kg + 22.1 kg) (1.95 m)² = 191.769 kg m²
The mass of the monkey and the bananas are added to the platform, since they stick to it after the bananas are dropped. Now we can solve for ω2:
L1 = L2
I1 ω1 = I2 ω2
ω2 = (I1/I2) ω1
Substituting in the values for I1, I2, and ω1, we get:
ω2 = (167.859 kg m² / 191.769 kg m²) (1.53 rad/s) = 1.34 rad/s
Therefore, the final angular velocity of the platform with the bananas and the monkey is 1.34 rad/s.
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calculates the speed of the satellite which performs orbital motion around the earth from an altitude of 3600km?
Answers
Answer:
Using the equation for orbital speed
orbital speed= square root of GM/r
Where
G= Gravitational Constant = 6.674x10^-11m^3/kg.s^2
M= mass of The Earth=5.972x10^24 kg
r= the combined radius of The Earth and the height of the satellite above The Earth=6378km+ 3600km= 9978km converting to meters gives (1000m=1km) 9978km*1000m/1km= 9,978,000m or 9.978x10^6m
orbital speed = square root of (6.674x10^-11*5.972x10^24/9.978x10^6= 63198m/s
Draw a wave that has a wavelength of 3 cm and an amplitude of 1 cm. Label the wavelength, the amplitude, the rest position, and the crest and trough of your wave.
Answers
Answer:
Please find attached, the required wave drawn with MS Excel
Explanation:
Functions that represent waves is given as follows
A general form of the wave equation is A·sin(B·x) + D
Where;
B = 2·π/T
T = The period of the wave = 1/f
D = The vertical shift of the wave = 0
A = The amplitude of the wave = 1 for sine wave
v = The wave velocity
λ = The wavelength of the wave
f = The frequency of the wave
v = f·λ
At constant v, λ ∝ 1/f
∴ λ ∝ T
Where T = 3, we have;
B = 2·π/T
∴ B = 2·π/3
Therefore, we have the wave with an amplitude of 1 cm, and wavelength, 3 cm, given as follows
y = sin((2·π/3)·x)
Plotting the above wave with MS Excel, we can get the attached wave
a 34 kg child is riding a playground merry-go-round that is rotating at 15 rev/min. what centripetal force must she experience to stay on the ride if she is 1.2 m from its center?
Answers
100.56N to maintain her position. A force that causes a body to maintain a curved path is known as a centripetal force. .
What is the centripetal force calculation formula?The formula for centripetal force is supplied by the mass, velocity, and radius. f c = m v 2 / r. Where m = mass; v = velocity; and r = radius, fc = centripetal force. We must be aware that this formula resembles the traditional formula for the force in several ways.
Briefing:Given
The child's mass= (34 kg)
Weight (mg)= (34x9.8=333.2N)
And distance from the center
(w=215/60=1.570),
The distance from the center is 1.2 meters.
She applies centripetal force of
F=m(w)*2xr
F=34x(1.570)*2x1.2
F=100.56N to maintain her position.
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what Kinetic Energy is the energy of
matter.
Answers
Answer:
States of Matter and Kinetic Theory Theory of Kinetic Molecular Dynamics Kinetic energy is the energy possessed by an object as a result of its motion. The Kinetic Molecular Theory explains how molecules interact and how much energy they have. This idea is based on three different matter theories.
Explanation:
here ye go!
A marble is dropped into a graduated cylinder that is filled with water. Use the words
from the word bank to describe the speed and forces. Words may be used more than
once.
Point A: Speed
force
A
Point B: Speed
force
ml
Point C: Speed
force
30
B
20
is constant
increases
decreases
balanced
unbalanced
C
Answers
Answer:
v_t = \(\frac{2 g \ ( \rho_b - \rho_l ) r^2 }{9 \ \eta }\)
Explanation:
Let's describe the motion and forces on the marble when it falls into the graduated cylinder filled with water.
Initially, the marble in the air falls under the influence of its weight (gravity force), when it enters the water, a friction force appears that INCREASES with SPEED and opposes the movement, this force is called Stokes force.
Fr = 6π R η v
where η is the viscosity of water
also because of this in a liquid it has an upward thrust, given by Archimedes' law, this thrust is CONSTANT
B = ρ_l g V_l
in that case the volume of liquid(V_l) is equal to the volume of the marble.
Constant force of gravity
W = mg
using the concept of density
ρ_body = m / V
W = ρ_body g V_body
we apply Newton's second law
Fr + B - W = ma
the friction force increases and the other two are constant, so acceleration decreases until reaching zero, at this point the forces are in BALANCE
Fr + B - W = 0
and the speed remains constant, being called TERMINAL SPEED
v_t = \(\frac{2 g \ ( \rho_b - \rho_l ) r^2 }{9 \ \eta }\)
from this point on, the displacement is proportional to the time
How much heat is required to raise the temperature of 2.0 kg of concrete from 10C to 30C? (The specific heat of concrete is 880 j/kg-C.)
A. 22 J
B. 88 J
C. 8800 J
D. 35200 J
Answers
Answer:B
Explanation:
5. Michael wanted to see what kitchen cleaner worked best for cleaning her counters. He used Lysol, Clorox, Pine-sol, and just water. For each cleaner, he put 5 milliliters of grape juice on the counter, sprayed the cleaner, and wiped it with one paper towel.
Answers
Answer:
Michael wanted to see what kitchen cleaner worked best for cleaning his counters. He used Lysol, Clorox, Pine-Sol, and water. For each cleaner, he used 5 milliliters of grape juice on the counter, sprayed the cleaner, and wiped it with one paper towel. Which of the following would be a constant?
answer choices:
-Lysol
-Cleaning products
-5 milliliters of grape juice
-Cleanest countertop recorded
5 milliliters of grape juice will be constant.
Explanation:
The different cleaning agents have different cleaning capabilities and some will require more of its quantity than others to clean the counter.
Secondly, only the grape juice has a measured amount of 5 milliliters
fill in the blanks
11) Stored energy is called ________ energy.
12) When you move your hand or foot, your body has converted potential energy into ________ energy.
13) When coasting while roller skating, you eventually stop due to ________.
14) A ball has 100 J of potential energy when it is on a shelf. The kinetic energy of the ball the instant it hits the floor is ________J.
Answers
Which of the following is a chemical change?
A. Water vapor in the air turns to liquid water in the form of rain
B. The oxygen in the air forms ozone in presence of UV rays
C. Dust and soot particles being suspended in the air
D. Sulphur dioxide being released in the air
Answers
Answer:
B
Explanation:
What does the acronym B.E.E.F. stand for?
Question 5 options:
box-out, elbows out, energize, follow-through
balance, engage, eyes, field goal
block, engage, eyes, free-throw
balance, eyes, elbow in, follow-through
The defense is the team that has possession of the basketball, and is trying to score points.
Question 6 options:
True
False
Question 7 (5 points)
The bounciness of a basketball is most important for which action?
Question 7 options:
Shooting
Passing
Dribbling
Stealing
Question 8 (5 points)
What can you infer about why certain shots are worth three points, and others are only worth two?
Question 8 options:
Three-point shots are taken from longer distances, so they're harder to make
Three-point shots reward players for not committing fouls when they shoot
Three-point shots require shooters to battle through more defensive pressure than two-point shots
Three-point shots can only be taken by guards, while two-point shots can be taken by any player
Question 9 (5 points)
How are free throws different from ordinary shots?
Question 9 options:
They only occur late in games
They're taken by defensive players, not offensive players
They cannot be rebounded
They're each worth one point instead of two or three
Question 10 (5 points)
A player with the basketball has to dribble the ball to be able to move around.
Question 10 options:
True
False
Question 11 (5 points)
All shots in basketball are worth two points.
Question 11 options:
True
False
Question 12 (5 points)
Which skill is least useful on defense?
Question 12 options:
Speed
Strength
Passing Ability
Jumping Ability
Question 13 (5 points)
Who is the inventor of basketball?
Question 13 options:
James Naismith
John Bradshaw
Jerry West
Joe Namath
Question 14 (5 points)
What conclusion can be drawn from the fact that many of the best international players want to play in the NBA?
Question 14 options:
It's easier to join NBA teams than teams in other countries
Many of these players have never been to the United States
Basketball isn't very popular outside the United States
The NBA is the most competitive league in the world
Question 15 (5 points)
Which action is taken only by teams on offense?
Question 15 options:
Rebounding
Blocking
Stealing
Shooting
Question 16 (5 points)
A free-throw is a one point shot from the foul line.
Question 16 options:
True
False
Question 17 (5 points)
Finger-pads, waist level, and eyes up are cues for what skill?
Question 17 options:
Shooting
Stealing
Dribbling
Passing
Question 18 (5 points)
A person should step toward their target when passing the basketball.
Question 18 options:
True
False
Question 19 (5 points)
Any illegal physical contact to a basketball player is a foul.
Question 19 options:
True
False
Question 20 (5 points)
It is important to keep the _________ in when shooting the basketball.
Question 20 options:
Ankle
Foot
Knee
Elbow
Answers
Answer:
balance, eyes, elbow in, follow-through
Explanation:
the distance between two successive troughs of wave is 0.4m. If the frequency of the source is 825Hz, calculate the speed of the wave
Answers
Answer:
speed=330m/s
Explanation:
the speed of wave is given as
speed(meter per second) =frequency(hertz) * wavelength(meters)
so using the above formula we substitute the figures given in the question in the formula we get
speed = 0.4*825
speed =330m/s
note m/s is the si unit for speed which is read as meter per second
therefore speed =330m/s
What is the formula of snell descartes on the refraction?
Answers
The relationship between the angles of incidence and refraction when a light ray passes across the boundary between two media with differing refractive indices is described by Snell-Descartes law.
Snell's law
n₁sinθ₁ = n₂sinθ₂
In the following equation, n1 and n2 stand for the refractive indices of the two media. θ₁ for angle of incidence (the angle between the incident ray and the normal to the boundary), and θ₂ for angle of refraction (the angle between the refracted ray and the normal to the boundary). Sometimes referred to as Snell-Descartes law, in its mathematical form.
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Using the model above, which letter represents the position of the earth when the northern hemisphere is experiencing the shortest hours of daylight
A
B
C
D
Answers
Answer:
At position "B" the northern hemisphere is tilted the most from the earth-sun direction and will experience the shortest hours of daylight, (and also the most indirect sun rays).
Which law best describes contact force
A.
second law
B.
third law
C.
law of gravity
D.
first law
Answers
Answer: the third law
Explanation:
What will happen in the next moment for the girl on the swing?
1.Fill in wether quantities will increase, decrease, or stay the same.
2. Support your answer in the table below
Answers
Answer:
Increase, same, same
Explanation:
Argon gas has several industrial uses, including arc welding and steel making. Argon is nonflammable and nontoxic, and so can be kept at room temperature (T = 19° C). Companies can buy Argon gas in cylinders which are kept at pressure of P = 246 psi. In this problem you may assume that ideal gas law still holds.
A) How much average kinetic energy (in J) does each atom of the argon gas in the cylinder have?
B) If the volume is 197L, how many moles of Argon are inside?
Answers
A. The average kinetic energy for each atom of argon gas in the cylinder is 6.04 × 10⁻²¹ Joule.
B. The number of moles of argon inside the cylinder is 1.38 × 10² mol.
The formula to calculate the average kinetic energy for monoatomic gas is
KE = 3/2 kT
T = the temperature (K)T = 19 °C = 19 + 273 = 292 Kk = Boltzmann constant = 1.38 × 10⁻²³ J/KKE = the average kinetic energy (J)
KE = 1.5 kT
KE = 1.5 × 1.38 × 10⁻²³ × 292
KE = 6.04 × 10⁻²¹ J
For every ideal gas applies the ideal gas equation
PV = nRT
P = the pressure (Pascal)P = 246 psi = 246 × 6.89 × 10³ = 1.7 × 10⁶ PascalV = volume (m³)
V = 197 L = 197 ÷ 1,000 m³ = 1.97 × 10⁻¹ m³n = the number of moles (mol)R = ideal gas constant = 8.314 J/mol KT = the temperature (K)
PV = nRT
1.7 × 10⁶ × 1.97 × 10⁻¹ = n × 8.314 × 292
3.35 × 10⁵ = n × 2.43 × 10³
n = 1.38 × 10² mol
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How is constant velocity indicated on an acceleration-time graph?
Answers
"Constant velocity" means that there is no acceleration. Acceleration = 0 .
So its graph is zero at every time. The line on the graph lies on the X-axis.
Please answer the question for gravitational field attached in the image.
Answers
We are given:
Radius of Venus= 6 * 10⁶ m
Height above the planet's ground = 9.4 * 10⁶ m
Mass of Venus = 4.867 * 10²⁴ kg
Finding the Gravitational Field:
We first need to calculate the distance between the center of masses
Distance between center of masses:
Since the point is above the surface of Venus, the radius of Venus and the height will add
Distance between the center of masses = 9.4*10⁶ + 6 * 10⁶
Distance (r) = 15.4 * 10⁶ m
Now back to Gravitational field!
We know the formula for Gravitational Field:
g = GM / r² [where g is the gravitational field, M is the mass of the planet, r is the distance between the center of masses and G is the gravitational constant]
plugging the known values in the formula:
g = (6.67 * 10⁻¹¹ * 4.867 * 10²⁴) / (15.4*10⁶)² [G = 6.67*10⁻¹¹ Nm²/kg²]
g = (32.46 * 10¹³) / (237 * 10¹²)
g = (32.46 * 10¹³) / (23.7 * 10¹³)
g = 32.46/23.7 [the 10¹³ got cancelled out]
g = 1.367 N/kg² (or m/s²)
Ribosomes are like tiny “factories” within cells that do all of the following EXCEPT:
Answers
Answer: translate DNA into RNA <3
Explanation:
An RNA polymerase binds to promoters and then breaks down hydrogen bonds between two strands of the DNA and attaches on one of them. A DNA strand is used as a template for a new RNA molecule. In this way, pre-mRNA is made, which becomes mRNA after the introns are removed.
A mRNA molecule enters the ribosomes, located in the cytoplasm. In these organelles, a transfer RNA attaches to a mRNA and the process of translation begins. The final product is a polypeptide chain.
An inductance L and a resistance R are connected in series to an ideal battery. A switch in the circuit is closed at time t
Answers
Maximum energy stored at the time t = (L/R) ln 2 after the switch is closed
The magnetic field stops expanding when the current in a practical inductor achieves its steady-state value of Im = E/R. The power p = vi is also 0 because the voltage across the inductor has fallen to zero. As a result, the inductor's ability to store energy grows only as the current approaches its steady-state value.
The magnetic field's maximum stored energy is constant when the current is stable. The inductance of the practical inductor does not store any extra energy, but the inductor's resistance continuously loses energy. The magnetic field must continue to exist. current.
The area under the power curve represents the maximum energy stored by the inductance and is equal to the product of the average power and the elapsed time.
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