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A young hockey player stands at rest on the ice holding a 1.3 kilogram helmet. The player tosses the helmet with a speed of 6.4 m/s in a direction 15o above the horizontal, and recoils with a speed of 0.30 m/s.
Calculate the mass of the hockey player. (kg)
A spider hangs from a strand of silk whose radius is5.8x10-6 m. The density of the silk is 1100kg/m3. When the spider moves, waves travel along thestrand of silk at a speed of 310 m/s. Determine the mass of the spider.
Water moves through a constricted pipe in steady, ideal flow. At the lower point the pressure is 1.73 105 Pa and the pipe radius is 2.80 cm. Find the speed of flow in the lower section
A field mouse trying to escape a hawk runs east for 6.0m , darts southeast for 3.8m , then drops 1.8m down a hole into its burrow
A block of wood with volume V floats in waterwith 0.67V submerged.In oil the block floats with 0.85V of its volume submerged. Find the density of the wood. Find the density of the oil.
What is the change in voltage along a 2.5 m long jumper lead made from 2.0 mm diameter copper if it is carrying a current of 90 amperes? How much power is dissipated in the lead?
question suppose a wire is stretched tightly around the earth. the radius of the earth is approx. 6400 km. if the wire
A 700 g block is released from rest at height h0 above a vertical spring by spring constant k = 470 N/m and negligible mass. The block sticks to the spring and momentarily stops after compressing the spring 24.0 cm. How much work is done by the sprin..
A particle of charge of +3.50 10-6 C is 12.0 cm distant from a second particle of charge of -2.10 10-6 C. Calculate the magnitude of the electrostatic force between the particles. N
Compute the average linear velocity of the discus
A golf ball rolls off the top of a flight of concrete steps of total vertical height 2.40m. what is the bounce height on the fourth bounce
discuss the mechanism of oscillating reactions using the briggs-rauscher or the belousov-zhabotinsky reactions as
A 62-kg water skier is being pulled by a nylon (Young's modulus 3.7 x 109N/m2) tow rope that is attached to a boat. What is the change in length of the rope when the skier has an acceleration whose magnitude is 0.49 m/s2
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