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A rifle with a weight of 40 N fires a 4.5-g bullet with a speed of 230 m/s.
(a) Find the recoil speed of the rifle.
(b) If a 800-N man holds the rifle firmly against his shoulder, find the recoil speed of the man and rifle.
An electric field of 254,000 N/C points due west at the certain spot. What are the magnitude and direction of the force that acts on the charge of -8.1 µC at this spot.
The blades in a blender rotate at a rate of 6900rpm. What is the angular acceleration as the blades slow down
The electric field strength is 5*10^4 N/C inside a parallel-plate capacitor with a2.2mm spacing, What is the proton's speed when it reaches the negative plate
If the spring is not a perfect spring but instead the magnitude of the force exerted by the spring is k times the cube of the amount stretched or compressed
a boy on a roof throws one ball downward and an identical ball upward. the ball thrown downward hits the ground with 100 J of kinetic energy. what is the kinetic energy of the second just before it hits the ground
A baseball is hit at ground level. The ball reaches its maximum height above ground level 3.0 s after being hit. Then 2.5s after reaching its maximum height, ball barely clears a fence that is 97m from where it was hit. Suppose the ground is level..
A luggage handler pulls a suitcase of mass 16.7kgup a ramp inclined at an angle 29.0? above the horizontal by a force F? of magnitude 147N that acts parallel to the ramp. Calculate the work done on the suitcase by the normal force
A thin film of MgF_2 (n= 1.38) coats a piece of glass. Constructive interference is observed for the reflection of light with wavelengths of 500 nm and 625 nm
A bat flying in complete darkness emits high frequency sound of 100 kHz to locate objects. What is the frequency in which the bat is received
I put a material on top of it, and it only took one rotation--or crank--to knock the material off from the machine and onto the ground.
A 2.05-kg block is on a plane at 19 degrees with respect to the horizontal. The coefficent of static friction between the block and the plan is 0.80. How many forces are acting on the block
When two resistors are connected in a parallel configuration the voltages across each are the same, What are the currents through these resistors
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