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What is the average acceleration of the cheetah from t = 0 to t = 4.0 seconds? (b) What is the average acceleration of the cheetah from t = 0 to t = 5.0 seconds?
An 86kg man drops from rest on a diving board 3.0m above the surface of the water and comes to rest 0.55s after reaching the water. What is the net force on the diver as he is brought to rest?
If the car accelerate at 22.4m/s, how much time till you reach the speed of sound? how many kilometers will you travel before you reach that speed?
A car of mass 557 kg travels around a flat, circular race track of radius 73.8 m. The co- efficient of static friction between the wheels and the track is 0.298. The acceleration of gravity is 9.8 m
a) Is the acceleration due to gravity on this planet more than, less than, or the same as the acceleration due to gravity on the Earth? Explain. b) Calculate the acceleration due to gravity on this
If the brakes are applied for 3.0 s, how fast is the car going at the end of the braking period? How far has it gone from its start?
A radio-controlled car increases its kinetic energy from 4 J to 12 J over a distance of 2 m. What was the average net force on the car during this interval?
The coefficient of kinetic friction between the crate and the ground is .473. Determine the tension in the rope between the truck and crate.
A spherical water drop 1.30 µm in diameter is suspended in calm air owing to a downward-directed atmospheric electric field E = 512 N/C.
A. How are bacteria cells adapted to live in a hypnotic environment?
A slingshot fires a pebble from the top of a building at a speed of 13.0 m/s. The building is 35.0 m tall. Ignoring air resistance, find the speed with which the pebble strikes the ground when the p
So you drop a rock with a mass of 0.07 kg over the side and measure that it takes 2.9 s for it to reach the ground. How high is the cliff?
One mole of an ideal gas does 1408 J of work on the surroundings as it expands isother- mally to a final pressure of 1.6 atm and vol- ume of 29 L. Find the initial volume.
Why might the process of photosynthesis be considered a bridge between the living and nonliving parts of the world??
A weight lifter lifts a set of weights a vertical distance of 3.55 m. If a constant net force of 370 N is exerted on the weights, how much net work is done on the weights?
1.What is your evidence that light carries energy?
Three of the charges are positive and one is negative. Determine the magnitude of the net electric field that exists at the center of the square.
Suppose that 6.50 g of hydrogen is separated into electrons and protons. Suppose also that the protons are placed at the Earth's north pole and the electrons are placed at the south pole. What is th
Where does circuit synapse with perceptual?
What changes were brought about due to the expansion of railroads
A daring stunt woman sitting on a tree limb wishes to drop vertically onto a horse gallop- ing under the tree. The constant speed of the horse is 15.2 m/s, and the woman is initially 2.35 m above th
Once you get on the walkway, you immediately turn around and start walking in the opposite direction with a speed of 1.6 m/s relative to the walkway?
What unique ability do DNA molecules have?
What has to be reduced to make a reaction to go fro reactants to products?
An explorer is caught in a whiteout (in which the snowfall is so thick that the ground cannot be distinguished from the sky. How far must he now travel to reach base camp?