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A rock is thrown downward from the top of a 39.8-m-tall tower with an initial speed of 9 m/s. Assuming negligible air resistance, what is the speed of the rock just before hitting the ground?
Larger animals use proportionately less energy than smalleranimals; that is, What resting power does this correspond to
While running, a person dissipates about 0.60 J of mechanical energy per step per kilogram of body mass. If a 64 kg person develops a power of 65W throughout a race, how fast is the person running? Assume that a running step is 1.5 m long.
An object falls because of gravity at the rate of -920 cm/s2 (- sign is indicative of a downward direction) for 10.00 Seconds. If it starts from rest (vo = 0) and its position starts from do= 0.0, where is it 10.00 Seconds later.
A sophomore with nothing better to do adds heat to 0.440kg of ice at 0 oC until it is all melted. The source of the heat is a very massive body at a temperature of 25.0 oC. What is the change in entropy of this body
A 20.0 kg wood ball hangs from a 1.70 m-long wire. The maximum tension the wire can withstand without breaking is 500 N. What is the largest speed this projectile can have without causing the cable to break
An electric eld of magnitude 3.5 kN/C is applied along the x axis. Calculate the electric flux through a rectangular plane 0.35 m wide and 0.7 m
Assume the square wire loop is replaced with a smaller one, made of the same wire that is 0.02 m on a side, half as long as the original.
A car traveling at 24 m/s runs out of gas while traveling up a 9 degree slope. How far will it coast before starting to roll back down.
A 1400 kg car carrying four 96 kg people travels over a "washboard" dirt road with corrugations 4.5 m apart. by how much does the car body rise on its suspension
A ceramic coffee pot with m=116g and c=1090J/(Kg*k), is initially at room Temp(24 celcius). what is the equalibrium temerature of the sysytem
A rescue helicopter lifts a 85 kg person straight up by means of a cable. The person has an upward acceleration of 0.70 m/s2, How much work is done by the person's weight
Two capacitors are connected to a battery. The battery voltage is V= 80V, Determine the total energy stored by the two capacitors
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