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Fraternal twins Jack and Jill are sent in two different ships to fetch water from the planet Kusbane that is 20 lightyears away. Jack's ship travels at 0.70 c and Jill's travels at 0.90 c. If the ships depart Earth at the same time, what is the age difference between Jack and Jill when Jack's ship arrives at Kusbane? Which twin is older? Assume that Jill has waited for Jack. (Note: the answer is 4.36 years and Jack is older. Please show how to arrive at that answer.)
Starting with the left-most column, populate the boxes from left to right without skipping empty boxes. Ties should be grouped in the same box
How far will it coast before starting to roll back down. In addition, snow exerts a retarding force on the sled that points opposite to the direction of motion, and has a magnitude of 57 N. Find the acceleration of the sled and child.
A shopper pushes a cart 50 m south down one aisle and then turns 90° west and moves 28 m. He then makes another 90° turn and moves 11 m.
Suppose you measure the terminal voltage of a 3.260 V lithium cell having an internal resistance of 5.50 by placing a 1.00 kvoltmeter across its terminals, Find the actual terminal voltage to the nearest 0.01 V
A 16.5 kg gold bar at 26.0°C is placed in a large, insulated 0.800 kg glass container at 15.0°C with 2.00 kg of water at 25.0°C
An electric wire that has a mass of 5 kg for a 20m length is strung between two poles 20 m apart. What should be the tension in the wire if it is to take 0.8 seconds for a pulse to travel along the wire from one pole to the other.
The nonconservative wind and lift forces take the balloon up, doing +9.70 104 J of work on the balloon in the process. Evaluate at what height above the surface of the earth does the balloon have a speed of 7.00 m/s? Enter a number.
A 2.0 kg ball swings in a vertical circle on the end of an 80cm long string. Calculate the speed, magnitude and direction of acceleration
A bullet is fired vertically into a 1.3kg block of wood at rest directly above it. If the bullet has a mass of 29g and a speed of 470m/s, how high will the block rise after bullet becomes embedded in it.
Two identical small metal spheres are separated by 1.00 x 10^5 m and exert an 18.9 N repulsive force on each other, determine the charges of the spheres before the connection
The output voltage of an AC generator is given by ?v = (120 V) sin (50?t). The generator is connected across a 25.0-? resistor. Find the power delivered to the resistor
Two mirrors meet at a 127° angle. If light rays strike one mirror at 40° as shown, at what angle ? do they leave the second mirror.
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