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Suppose a sphere, thin hoop, and a disk were all rolling along a horizontal surface with the same speed when they encountered a hill and started rolling up the hill. Which would roll up the hill the farthest?
Medical technicians use small centrifuges to isolate blood cells. How far are the test tubes from the rotation axis
A student sits on a rotating stool holding two 3.5 kg objects. When his arms are extended horizontally, Find the kinetic energy of the student before and after the objects are pulled in
To determine the specific heat capacity of lead, you get 500g of lead shot to 100 degrees C and place it in an aluminum calorimeter of mass 250g, what is the specific heat of lead
A police siren has a frequency of 550 Hz as the police car approaches you and a frequency of 450 Hz after it has passed you and receding, What is the true frequency of the police siren
Years ago, a block of ice with a mass of about 20 kg was used daily in a home icebox. how much heat did a block of ice that size absorb
Two boxes are seen to accelerate at the same rate when a force Fis applied to the first box and 4F is applied to the secondbox. What is the mass ratio of the boxes?
A trunk of mass m = 1.800 kg is pushed a distance d = 185 cm up an incline with an angle of inclination theta = 25.0 ° by a constant horizontal force P = 300. N, Calculate the work done on the trunk by the frictional force
A 60kg bicyclist rides his 7.8kg bicycle with a speed of 16m/s. How much work must be done by the brakes to bring the bike and rider to a stop.
A size-5 soccer ball of diameter 22.6 and mass 426 rolls up a hill without slipping, reaching a maximum height of 3.50 above the base of the hill. At what rate was it rotating at the base of the hill
A horizontal force of 200N is applied to a 55kg cart by a child across a 10m level surface. The cart accelerates at 2m/s^2. What force of friction acts to retard the motion of the cart
Two long, straight wires are separated by 0.12 m. The wires carry currents of 1.0 A in opposite directions, as the drawing indicates. Find the magnitude of the net magnetic field at the point A
an automobile tire has a volume of 1.64 x 10-2 m3 and contains air at a gauge pressure pressure above atmospheric
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