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Two rockets, A and B, approach the earth from opposite directions at speed 0.60c. The length of each rocket measured in its rest frame is 100 m.
What is the length of rocket A as measured by the crew of rocket B?
Consider a 7 solar mass main sequence star, Estimate its luminosity in solar luminosities and how long (in years) it could maintain its luminosity through gravitational collapse
In a local bar, a customer slides an empty beer mug down the counter for a refill, With what velocity did the mug leave the counter
a person exerts force of 35n on the end of an door 88 cm wide, what is the magnitude of torque if the force is exerted perpendicular to the door
Put a 10 V battery with a 10 ? internal resistance in series with a switch: hook this up to a 100 ? resistor in parallel with a 2 H inductor. Find the initial voltage across the inductor when the switch is opened
The cylinder of a bicycle pump has an interior diameter of 2.0 cm and a length of 40 cm. How far down (in cm) must you push the piston before air begins flowing into the tire
A boy pulls on a wagon with a horizontal force of 75N. what is the average power generated by the child, in watts
A satellite is placed in orbit 100 km above the surface of the earth (radius = 6370 km, mass = 5.98 x 1024 kg). A. What is the value of the acceleration of gravity at that altitude as a percentage of the acceleration at the surface of the earth
A spring with a constant 150 N/m is attached to a block with a mass 1.5 kg. What is the maximum displacement the mass will achieve
A simple pendulum has a mass of 0.150 kg and a length of 3.00 m. It is displaced by an angle of 12.0° and then released. What is the utmost speed?What is the maximum angular acceleration?What is the maximum restoring force.
At an amusement park there is a ride in which cylindrically shaped chambers spin around a central axis. What is the radius of a chamber
A firefighter with a weight of 702 N slides down a vertical pole with an acceleration of 2.90 m/s2, directed downward. What are the magnitudes and directions (choose the positive direction up) of the vertical forces
A child is riding a merry-go-round which completes a revolution every 8.36 s. The child is standing 4.65 m from the center of the merry-go-round. Evalute the magnitude of the centripetal acceleration of the child?
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