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A 13 kg block is at rest on a level floor. A 405 g glob of putty is thrown at the block such that it travels horizontally, hits the block, and sticks to it. The block and putty slide 15 cm along the
A tank having a volume of 0.100 m3 contains helium gas at 130 atm. How many balloons can the tank blow up if each filled balloon is a sphere 0.300 m in diameter at an absolute pressure of 1.45 atm?
20000N, 2.47 meter cannon, 40 degrees above horizontal, 74 meters/second, conservation of energy, what sized cannon ball, in kg, must be used?
Mr. Physics drops a rock down a 250 meter deep well. How soon after he drops the rock does he hear it hit the bottom of the well?
A car drives straight off the edge of a cliff that is 47 m high. The police at the scene of the accident observed that the point of impact is 122 m from the base of the cliff. How fast was the car t
A spaceship moves away from Earth at a speed 0.874c and fires a shuttle craft that then moves in a forward direction at 0.21c relative to the ship. The pilot of the shuttle launches a probe forward
Object A, which has been charged to +10nC, is at the origin. Object B, which has been charged to -22nC, is at (x,y)=(0.0cm,2.0cm). What is the magnitude of the electric force on object A? What is t
Suppose you have 3.0mol of O2 gas. How many coulombs of positive charge are contained in this gas in the atomic nuclei?
A baseball pitcher can throw a ball with a speed of 40. He is in the back of a pickup truck that is driving away from you. He throws the ball in your direction, and it floats toward you at a lazy 30
The orbit of earth's moon has a period of 27.3 days and a radius (semi-major axis) of 2.56 x 10-3 A.U. (= 3.84 x 105 km). What is the mass of Earth? What are the units?
A stone is dropped from rest into a well. The sound of the splash is heard exactly 2.30 s later. Find the depth of the well if the air temperature is 14.0°C.
Children in a tree house lift a small dog in a basket 5.50 m up to their house. If it takes 191 J of work to do this, what is the combined mass of the dog and basket?
A hockey puck slides off the edge of the table with an initial velocity of 20.0m/s. the height of the table above the ground in 2.0m. what is the magnitude of the verticle component of the velocity
Vehicle(mass = 2500 kg) treviling in the opposite direction. in the collision, the two vehicles come to a halt . At what speed was the sport utility vehicle traveling?
A woman is pushing a box along the ground. She is exerting a horizontal force of 156 N on the box. The box has a mass of 84.0 kg, and has an opposing horizontal frictional force of 135 N. What is t
The latent heat of vaporization for helium is 2.1x104 J/kg. What mass of liquid helium boils away through a venting valve in one hour?
A 25 kg solid door is 220 cm tall, 94 cm wide. What is the door's moment of inertia for rotation about a vertical axis inside the door, 13 cm from one edge?
The central bright fringe broadens to a width of 2.1 cm. What is the width of the second slit? It may be assumed that is so small that sin is approximately equal to tan.
If this energy were used to accelerate the ice from rest, what would be the linear speed of the ice? For comparison, bullet speeds of 700 m/s are common.
A small ball of mass 42 g is suspended from a string of length 69 cm and whirled in a circle lying in the horizontal plane.If the string makes an angle of 28 with the vertical, find the centripetal
An aluminum bar 125 mm long and having a square cross section 16.5 mm on an edge is pulled in tension with a load of 66,700 N, and experiences an elongation of 0.43 mm. Assuming that the deformatio
How much energy is released when 0.0254-m (one inch) of water falls over an area of 2.59 X 10^6 m^2 (one square mile)?
A 3.50-m-long, 360 steel beam extends horizontally from the point where it has been bolted to the framework of a new building under construction. A 66.0 construction worker stands at the far end of
An object weighs 317 N in air. When tied to a string, connected to a balance, and immersed in water, it weighs 264 N. When it is immersed in oil, it weighs 268 N. Find the density of the object. Ans
If 2.0% of this energy could be converted by a weight lifters body into work done in lifting a barbell, what is the heaviest barbell that could be lifted a distance of 2.1-m?