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A satellite operates at an altitude of20,100 km and uses communication frequencies of 1598.48 MHz. Find the gravitational frequency change with respect to Earth.
In 6.00 days the number of radioactive nuclei decreases to one-eight the number present initially. What is the half-life (in days) of the material
A rock is dropped from a sea cliff, and the sound of it strikingthe ocean is heard 3.2 s later. If the speed of sound is340 {\rm m/s}, how high is the cliff?
The hunter uses a small powerboat that moves at a maximum speed of 9 km/h with respect to the water. Illustrate what is the minimum time necessary for crossing?
Choose one part of the photo-electric experiment that cannot be explained by assuming that light is a wave. Why do we need the concept of light as a particle?
a car travels up a hill at a constant speed of 55 kmh and returns down the hill at a constant speed of 22 kmh.
An athlete at a gymnasium holds a 3.0kg steel ball in his hand. His arm is 70cm long and has a mass of 4.0kg. Calculate the magnitude of the torque about his shoulder if he holds his arm
What is an electric potential at a point
A lens for a 35-mm camera has a focal length given by f= 49mm. A How close to the film should the lens be placed to form a sharp image of an object that is 5.3mm away?
question how fast can you set the earth moving? in particular when you jump straight up as high as you can what is the
A 54.1-kg ice skater is moving at 4.09 m/s when she grabs the loose end of a rope, the opposite end of which is tied to a pole, Compare this force with her weight by finding the ratio of the force to her weight
What is the minimum work needed to push a 950kg car 810m upalong a 9.0 degree incline
A particle with charge q is at rest when a magnetic field is suddenly turned on. The field points in the z-direction. What is the direction of the net force acting on the charged particle?
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