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The length of a string of a pendulum is increased by a factor of9. By what factor has the period of the oscillation changed? By what factor has the frequency of the oscillation changed?
A rifle with a weight of 40 N fires a 3.5 g bullet with a speed of 240 m/s. find the recoil speed of the man and rifle
A boy drags his 8.00 kg sled at constant speed up a 10.0 degree hill. He does so by pulling with a 40.0-N force on a massless rope attached to the sled. find the coefficient of kinetic friction between sled and snow
Some thermometers indicate temperature by means of the thermal expansion of alcohol. by what percent does the volume change if the temperature changes by 9 F
A projectile is shot from the edge of a cliff h = 105 m above ground level with an initial speed of v0 = 145 m/s at an angle of 37.0° with the horizontal. Find the maximum height above the cliff top reached by the projectile
A ray of light is incident on the surface of a block of clear ice at an angle of 34.0° with the normal, Find the angle between the reflected and refracted light.
As a spacecraft approaches a planet, the rocket engines on it are fired (turned on) to slow it down so it will go into orbit around the planet. how long (in minutes) must the engines be fired
A pitcher throws a curveball that reaches the catcher in 0.59 s, What is the angular displacement of the baseball (in radians) as it travels from the pitcher to the catcher
A transformer has 20 turns of wire in its primary coil and 40 turns on its secondary coil. What is the power delivered to this transformer
Suppose a monatomic ideal gas is contained within a verticalcylinder that is fitted with a movable piston. The piston isfrictionless and has a negligible mass. Through what distance does the piston drop
A horseshoe (mass= 0.50 kg), which has just been forged, is dropped into 2.7L of water in a 0.45kg iron pot initially at 22 C. estimate the initial temperature of the hot horseshoe
A box with a total surface area of 1.11 m2 and a wall thickness of 3.1 cm is made of an insulating material. Find the thermal conductivity of the insulating material
describe free-body diagram for the mass. Calculate the tension in each part of the rope.
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