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A skateboarder, starting from rest, rolls down a 14.6-m ramp. When she arrives at the bottom of the ramp her speed is 8.49 m/s. (a) Determine the magnitude of her acceleration, assumed to be constant. (b) If the ramp is inclined at 27.9 ° with respect to the ground, what is the component of her acceleration that is parallel to the ground?
A bone is found in your backyard. You decide to date it and discover is has an C-14 activity of 0.097 Bq per gram of carbon. Find the age of the bone
two masses are separated by 3.85m. the mass of objects are 5.98kg and 7.35 kg. how far is the center of mass of the system
Consider a spring handing vertically from a ceiling, attached to a mass m of 2 kg. The spring constant, k, is 30 N/m. How far does the spring travel downwards before it reverses direction
You need to make an ac generator with a sinusoidal output of 14.0 V amplitude and frequency 50 Hz. At what angular frequency should the coil be rotated
find the speed of the block as it hits the ground.A 4-kg ball traveling to the right with a speed of 4 m/s collides with a 5-kg ball traveling to the left with a speed of 2 m/s. What is the total momentum of the two balls after they collide.
q1. the active element of a certain laser is made of a glass rod 33.0 cm long and 1.60 cm in diameter. assume the
A playground merry-go-round spins with negligible friction. A child moves from the center out to the rim of the merry-go-round platform. In this merry-go-round and child system, which of these quantities change:
A green LED has a forward voltage drop of 2.3 V. Estimate the bandgap energy for the semiconductor that makes the green LED
suppose you have two positive point charges and want to move them closer together. to do the least amount of work you
the coefficient of kinetic friction between the table and the block is 0.320. Sand is gradually added to the bucket until the system just begins to move. Compute acceleration of the motion.
An archer shoots an arrow with a velocity of 46.0 m/s at an angle of 45.5° with the horizontal. What is the initial speed of the apple
A student sees a newspaper ad for an apartment that has 1430 square feet (ft2) of floor space. How many square meters of area are there
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