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A 41.2-kg boy, riding a 2.65-kg skateboard at a velocity of +5.07 m/s across alevel sidewalk, jumps forward to leap over a wall. Just afterleaving contact with the board, the boy's velocity relative to thesidewalk is 6.60 m/s, 9.63° above the horizontal. Ignore anyfriction between the skateboard and the sidewalk. What is the skateboard's velocity relative to the sidewalk at this instant? Besure to include the correct algebraic sign with your answer.
A 19-kg chandelier is suspended from the ceiling by four vertical steel wires. Each wire has an unloaded length of 5 m, how far do the wires stretch
a 0.060 kg tennis ball moving with a speed of 7.60 ms has a head-on collision with a 0.080 kg ball initially moving in
A golf ball is dropped from rest from a height of 9.70 m. It hits the pavement, then bounces back up, rising just 6.00 m before falling back down again. calculate the total amount of time that the ball is in the air
A boat, whose speed in still water is 1.70 m/s, must cross a 260m wide river and arrive at a point 110m upstream form where it starts. What is the speed of the river's current
F ind 3-5 different types of vacuum pumps - explain how they work - explain where you would use them - explain their operating pressure - etc... I don't have a clear idea for the vacuum pumps, for any 3-5 types of vacuum pumps.
A tube with a 3.0-mm radius has ions flowing through it along its length. To determine the rate at which the charge is being moved through the tube, what is the magnitude of the current flowing through the tube
A 3.2 mass attached to a spring with a spring constant of 114 is oscillating in a vat of oil, which damps the oscillations. If the damping constant of the oil is 10kg/s, how long would it take the amplitude of the oscillations to decrease to 1.0% ..
A 0.15 kg meter stick is balanced with the pivot point at the 18 cm mark. A weight of 3.2N is hung from the shorter end. Where should the weight be positioned in order to balance the meter stick?
A highway curve has a radius of 128 m. At what angle should the road be banked so that a car traveling at 27.2 m/s has no tendency to skid sideways on the road
Three forces act on an object. A 2 N force acts due east and a 3 N force acts due north. what is the magnitude of the third force
A concial tank (inverted right circular cone) filled withwater is 10ft across the top and 12ft high. How much work is needed to pump all the water out over the top
Describe the difference between an ionic bond and a covalent bond. Give an example of a compound that exhibits ionic bonding. Give an example of a compound that exhibits a covalent bond.
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