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A baseball batter swings the bat and applies a force of 66.95 N to the ball for a time of 0.36 s. Assuming the force is constant, what is the impulse on the ball?
A star with the same mass and diameter as the sun rotates about a central axis with aperiod of about 28.4 days. What would be the new rotation period (s) of the star
A 2.0 kg block is kicked up a wooden ramp that is inclined at a 30? angle to the horizontal. How long does the entire up and down trip take
A hydrulic jack in a mechanic's shop supports a car of mass M= 2.1 x 10^3 kg. What force must the pump exert on the fluid at the input to support the weight of the car
A block of wood floats in water with 0.64 of its volume submerged. When placed in oil, the submerged fraction of the volume is 0.88. Find the density of the wood. Find the density of the oil
In the system shown in the figure, suppose the block has a mass of 3.3 , the spring has a force constant of 450 , and the coefficient of kinetic friction between the block and the floor is 0.19. Find the work done on the block by the spring
How many kilometers per liter will a car obtain if its engine is 25 percent efficient and it encounters and average force of 1000 Newtons? Suppose the energy content of gasoline is 40,000,000 joules per liter (J/L).
Gas lanterns used on camping trips have mantles (small lacy bags that give off light) made from a rayon mesh impregnated with thorium and other materials. A typical mantle contains 439 mg of thorium. What is the reactivity of the mantle
After working really hard on a hot day a third tuning fork is used with a frequency of 1053 Hz, and the distance between the 1st and 3rd standing wave created is 33.0 cm, what is the temperature of the air in this pipe
A violin string 12.5 cm long and fixed at both ends oscillates in its n = 5 mode. The speed of waves on the string is 268 m/s, and the speed of sound in air is 348 m/s. What are (a) the frequency and (b) the wavelength of the emitted sound wave?
question1a subway train starting from rest leaves a station with a constant acceleration. at the end of 9.34 s it is
A microwave transmitter emits electromagnetic waves of a single wavelength. The maximum electric field 3.32 km from the transmitter is 192 mV/m. Calculate the total power emitted by the transmitter
A 1250 kg car drives up a hill that is 15.2 high. During the drive, two nonconservative forces do work on the car: (i) the force of friction, and (ii) the force generated by the car's engine. The work done by friction is ?2.91×105 J; the work done by..
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