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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.
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?
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
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?
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?
A satellite is placed between the Earth and the Moon, along a straight line that connects their centers of mass. The satellite has an orbital period around the Earth that is the same as that of the
What is the weight of the displaced amount of water when the boulder is placed inside the tank (measured in N)? The tank had an original volume of water of 5000 L.
A stone with a mass of 0.900 kg is attached to one end of a string 0.900 m long. The string will break if its tension exceeds 60.0 N. The stone is whirled in a horizontal circle on a frictionless t
Assume that both whistles have the same frequency and that the speed of sound is 344 m/s. If Kathy hears a beat frequency at 7.92 Hz,what is the frequency of the whistles?
A piece of a metal weighing 0.5 kg, at 100 degrees celsius, was transferred to 0.25 kg of a liquid at 20 degrees celsius. the specific heat capacity of the metal is 400JKg-1K-1 and the the specific
The hiker ends up back where she started, so the resultant displacement is zero, or a+b +c = 0. Find the magnitudes of (a) vector b and (b) vector c .
The crest of the second hill is circular, with a radius of r = 35.0 m. Neglect friction and air resistance. What must be the height h of the first hill so that the skier just loses contact with the
A worker stands still on a roof sloped at an angle of 28° above the horizontal. He is prevented from slipping by a static frictional force of 470 N. Find the mass of the worker.
A model rocket is launched straight upward. Its altitude y as a function of time is given by y = bt -ct2, where b = 82 m/s, c = 4.9 m/s2, t is the time in seconds, and y is in meters, (a) Use differ
How much distance is between you and the deer when you come to a stop? What is the maximum speed you could have and still not hit the deer?
You stand at the top of a cliff while your friend stands on the ground below you. You drop a ball from rest and see that it takes 1.2s for the ball to hit the ground below .Your friend then picks u
What are the magnitude and direction of the net force exerted by these two charges on a negative point charge q3 = -0.600 nC placed at the origin?
A 250 kg car starting from rest is pushed 30m. When the car reaches 30m, it's traveling at a speed of 12m/s and it encounters 52N of friction. What is the acceleration of the car and what is the fo
A small motor runs a lift that raises a load of bricks weighing 810 N to a height of 14 m in 25 s. Assuming that the bricks are lifted with constant speed, what is the minimum power the motor must
A 5.00-g lead bullet traveling at 300 m/s is stopped by a large tree. If half of the kinetic energy of the bullet is transformed into internal energy and remains with the bullet, while the other ha
Draw a free-body diagram showing all the forces on the crate if the conveyer belt runs to the right at constant speed.
Block of mass 3 kg that is sitting at rest on a nearly frictionless surface. What is the speed of the block after the bullet embeds itself in the block.
A diving board length = 5.60 that weighs 250 is supported by two pillars. One pillar is at the left end of the diving board, as shown below; the other is distance = 1.65 away. Find the magnitude of