A 0.2 kg hockey puck is sliding along the ice with an initial velocity of -5.0 m/s when a player strikes it with his stick, causing it to reverse its direction and giving it a velocity of +10 m/s. The impulse the stick applies to the puck is most nearly ?

If jason ii needs 15 kw of power at 300 volts to operate, what amperage of current must flow through the cable?

The radioactive isotope of lead, pb-209, decays at a rate proportional to the amount present at time t and has a half-life of 3.3 hours. if 1 gram of this isotope is present initially, how long will it take for 80% of the lead to decay? (round your answer to two decimal places.)

How long will it take a car traveling of a constant speed of 45m/s to cover the distance of a 2.5km?