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A spaceship is flying directly away from Earth at a speed of 0.760c, and the captain's family at home on Earth broadcasts their well wishes on the Family Radio System frequency of 462.5625 Mhz. To what frequency must the homesick captain tune the ship's radio to receive the broadcast? (Round your answer to three significant figures.)
two ants race across a table 52 cm long. one travels at 4.72 cms and the other at 3 cms. when the first one crosses the
How many nitrogen molecules must strike a 1 cm2 surface each second to exert a pressure of 1 atm (Assume that the molecules are all moving at the same speed, at a temperature of 300K, and 45 degree angle to the wall).
A neodymium-glass laser emits short pulses of high-intensity electromagnetic waves. Find the average power of each pulse
The horsepower rating commonly utilized for engines indicates the rate at which they can do work. A one-horsepower engine can do 746 J of work each second. A lawn mower has a 6.50 horsepower engine that runs at 3800 rpm.
A golf ball of mass 0.045 kg is hit off the tee at a speed of 37m/s. The golf club was in contact with the ball for3.90×103s. Find the average force exerted on the ball by the golf club
Suppose that when you ride on your 6.60-kg bike the weight of you and the bike is supported equally by the two tires. What is your weight
A 25Kg block on horizontal surface is attached to a light spring k=8.0KN/m the block is pulled 10 cm to the right from its equilibrium position and released from rest. How much work is done by frictional force on the block as it moves the 2.0 cm
When a force of 19.0 N is applied to a spring, it elongates 0.0858 m. find out the period of oscillation of a 4.0 kg object suspended from this spring.
Tension is maintained in a string as in the figure below. What is the mass per unit length of the string
One afternoon, a couple walks three-fourths of the way around a circular lake, the radius of which is 1.48 km. What is the magnitude of the couple's displacement
A barge on a still lake is moving toward a bridge at 10 meter per second. Use x = x0 + v0t + 1/2at2 to obtain the time it takes the barge to reach the bridge
Two long, parallel wires are separated by 3.0m. Each wire has a 25-Acurrent, but the currents are in opposite directions. Determine the magnitude of the net magnetic field midway between the wires.
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