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You are traveling in a spaceship at a speed of 0.52c away from Earth. You send a laser beam toward Earth traveling at velocity relative to you. What do observers on the Earth measure for the speed of the laser beam?
A 9kg mass is connected by a a string over a frictionless pulley to a 5kg block sliding on the table.The coefficient of friction is 0.2, find the tension in the string.
The potential difference between the plates of a capacitor is 247 V. Midway between the plates, a proton and an electron are released. find the initial speed of the proton
The fundamental frequency of an organ pipe corresponds to 262 HZ. The third resonance of a closed pipe has the same frequency. What are the lengths of the two pipes
q1. the temperature of the glass surface of a 30 w light bulb is 75degc when the room temperature is 10degc. estimate
A juggler throws a ball straight up into the air and it takes 4.20 seconds to reach its peak. How many seconds will it take after that to fall back into his hand? Assume he throws and catches the ball at the same height.
The inner and outer surfaces of a cell membrane carry a negativeand positive charge, respectively. Because of these charges, apotential difference of about 0.065 Vexists across the membrane.
A soldier has a huge contraption that notches a large 4 kg arrow (it looks more like a lance) in a massive bow and uses a winch system to draw the arrow back to set the bow. What is the speed of the arrow
Tam walks with the velocity of 1.8 m/s west. He does so while riding on a conveyor belt that moves at a velocity of 0.7 m/s west. What is Tam's velocity.
A virtual image is formed 21.0 cm from a concave mirror having a radius of curvature of 34.5 cm. What is the magnification of the mirror
A man stands on a platform that is rotating (without friction) with an angular speed of 1.1 rev/s; his arms are outstretched and he holds a brick in each hand. What provided the added kinetic energy
A parallel plate capacitor consists of two square metal plates of dimension 10 cm by 10 cm. The plates are separted by a distance of .1 mm. how does the capacitance change
The flywheel of a motor has a mass of 300 kg and a moment of inertia of 580 kg*m^2 The motor develops a constant torque of 2000 N*m and the flywheel starts from rest. How much work is done by the motor during the first 4.00 revolutions
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