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A stone, initially at rest, is dropped from the roof of a building. After 2.00 second it is dropped, a second stone is thrown straight down with an initial speed of 25 m/s. The two stones hit the ground at the equal time.
a) Determine how long did it take the first stone to reach the ground?
b) Determine how high is the building?
c) Determine the speeds of the two stones just before they hit the ground?
A 47-ohm-resistor can dissipate up to 0.25 Watt of power without burning up. Find the smallest number of such resistors that can be connected in series
An eyepiece of 3.0- cm focal length and an objective of 0.29-cm focal length are used in a standard microscope. What power should be marked on the eyepeice?
An outfielder throws a 0.150 kg baseball at a speed of 54.0 m/s and an initial angle of 30.0°. What is the kinetic energy of the ball at the highest point of its motion
A golf ball of mass 0.045 kg is hit off the tee at a speed of 36m/s . The golf club was in contact with the ball for 3.90×10?3s. Find the average force exerted on the ball by the golf club
A vehicle starts from rest and travels for 5.0 second with a uniform acceleration of +1.8 m/s2. Find how far has it gone
a current of 18.20 ma is maintained in a single circular loop with a circumference of 3.31m. a magnetic field of
Power lines have a limit on the maximum size of the electric field they produce. In most states a maximum of 4 kN/C at about 21 m from the wires is allowed. determine how much charge per unit length is on the wire
A skier traveling 12.0 m/s reaches the foot of a steady upward 18° incline and glides 11.2 m up along this slope before coming to rest. What was the average coefficient of friction
q1. a 0.070 kg arrow hits a target at 21.10 ms and penetrates 4.90 cm before stopping. what average force did the
Two people, one of mass 75 and the other of mass 65 , sit in a rowboat of mass 89. How far will the boat move
A uniform 1.5T magnetic field passes perpendicular through the plane of a wire loop 0.3m in area. What flux passes through the loop
What is the turntable rotation angular velocity
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