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Parachutist A parachutist weighing 80 kg, including the parachute, falls with the parachute open at a constant 8.5-m/s speed toward Earth.The drag coefficient Cd = 0.05. What is the area of the parachute?
Two children with masses of 20 and 30 kg are sitting on a balanced seesaw. If the lighter child is sitting 3 m from the center, how far from the center is the heavier child sitting?
Four identical cells, each of emf 2V are joined in parallel providing supply of current to external circuit consisting of two 15 ohm resistors joined in parallel, Calculate the internal resistance of each cell
A very thin sheet of glass (n = 1.5) floats on the surface of water (n = 1.33). What is the thickness of the glass
on average venus is 0.72 au from the sun and its surface temperature is 735 k. calculate how much of this is due to
For a particular track, the optimum pressure has been determined to be 8.5 psi (as measured by a tire gage). If a particular burnout maneuver will increase the temperature of the rear tires by 55 μF above their original temperature of 90 μF, to wh..
A hoop and a disk, both of 0.46- m radius and 3.0- kg mass, are released from the top of an inclined plane 3.2 m high and 7.0 m long. What is the speed of the hoop
Two normal unbiased six-faced dice A and B are rolled alternately starting with A ; if A shows a 6 the experiment ends. If B shows an odd number no points are scored, if it shows a 2 or a 4 then one point is scored, whilst if it records a 6 then t..
The uncertainty in an electron's position is 0.18 nm. What is the kinetic energy of an electron whose momentum is equal to this uncertainty
An engine does 20000 J of work and rejects 6120 J of heat into a cold reservoir whose temperature is 285 K. What would be the smallest possible temperature of the hot reservoir.
A 1.2 kg brick is held a distance of 2 m above a manhole and then dropped. What is the change in potential energy
A test tube contains 2.56 10-4 m3 of liquid carbon tetrachloride at a temperature of 75.5° C. Find the volume of carbon tetrachloride in the test tube at -11.7° C
The motion of a 25.0 kg mass on the end of a string is uniform circular motion. The magnitude of the tangential velocity of the mass is 5.0 m/s, Calculate the angular momentum of the mass
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