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A rifle with a barrel length of 65 cm fires a 9 g bullet with a horizontal speed of 380 m/s. The bullet strikes a block of wood and penetrates to a depth of 11 cm. What resistive force (assumed to be constant) does the wood exert on the bullet?
What is the coefficient of kinetic friction between the table and floor.
A turntable that spins at a constant 73.0 {rm rpm} takes 3.60 {rm s} to reach this angular speed after it is turned on. Find its angular acceleration (in {rm rad/s^{2}}), suppose it to be constant, and the number of degrees it turns through while ..
Calculate the acceleration on the radio. The rms voltage across a 5.02 Ω resistor is 34.7 V. Find the maximum instantaneous current by the resistor.
Furthermore, describe any differences in kinetic energy and gravitation potential energy among these balls while they hit the ground.
Two capacitors are connected in parallel across the terminals of a battery. One has a capacitance of 2.5 uF, What is the voltage of the battery
Treating our rigid legged friend as a particle, what is the average force his feet exert on the ground while he slows down.
A 64 kg person on skis is going down a hill sloped at 30° from the horizontal. The coefficient of friction between the skis and the snow is 0.15. What would be the magnitude of acceleration.
430 cm3 of water at 86°C is mixed with 120 cm3 of water at 11°C. Calculate the final equilibrium temperature, What is the equilibrium temperature after initial heat loss
A researcher would like to perform an experiment in a zero magnetic field, which means that the field of the earth must be cancelled. What current is needed in the solenoid's wires
Heather and Jerry are standing on a bridge 46 above a river. Heather throws the rock straight down with a speed of 20. Jerry, at accurately the same instant of time, throws a rock straight up with the same speed. Overlook air resistance.
During a violent storm, a car is struck by a failing high-voltage wire that puts an excess charge of -850 mircoC on the metal car. a) how much of this charge is on the inner surface of the car? b) how much is on the outer surface of the car?
What is size of the gravitational force on the moon
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