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A space ship is moving toward the earth at a speed of 0.75 c when it launches two space probes at precisely the same time. Probe A is launched toward the earth at a speed of 0.8cas measured on the space ship. Probe B is launched away from the earth at a speed of 0.6 c as measured on the spaceship. Compute the speeds of the two probes as measured on earth.
A 2.85 kg object is held in place on an inclined plane that makes an angle of 40 degrees with the horizontal. Calculate the initial acceleration of the system
Now suppose the friction is sufficient to keep the car from skidding. Compute the magnitude of the normal force exerted on the car by the road's surface.
an amusement park ride is designed such that riders experiance a total magnitude of no more than 30mss acceleration.
If the wire is heated to 40.0°C while the 7.0-V potential difference is maintained, what is the resulting current in the wire
q1. a 280 block on a 50.0 -long string swings in a circle on a horizontal frictionless table at 80.0.what is the speed
A bug crawls outward from the center of a compact disc spinning at 160 revolutions per minute. The coefficient of static friction between bug's sticky feet and disc surface is 1.10.How far does the bug get from the center before slipping.
A barge on the Ohio River is 35 ft wide and 200 ft long with walls which are 12 ft high. One day you see it going up river empty and 10.5 ft of the barge is above water. What is the mass of the barge?
Calculate the absolute pressure at the bottom of a fresh-water lake at a depth of 31.2 m. Assume the density of the water is 1.00 103 kg/m3 and the air above is at a pressure of 101.3 kPa
Human blood contains plasma, platelets, and blood cells. To separate the plasma from other components, centrifugation is used. Effective centrifugation requires subjecting blood to an acceleration of 2000g or more.
Five children are pushing on a snowball. Each is pushing with a force of 10.0 N. Each is pushing at an angle of 45° relative to his neighbor. What is the net push on the ball
A square room has 3 mirrored walls of length L with one side missing. A laser is fired from the center of the open side of the room with an angle of incidence, I, what must the angle of incidence be
Kelli weighs 405 N, and she is sitting on the playground swing that hangs 0.43 m above the ground. Her mom pulls the swing back and releases it when the seat is 1.00 m above the ground. suppose that air resistance is negligible.
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