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An arrow is shot straight up from a pit 12 m below ground at 38 m/s.
a. Find its max height above ground.
b. At what times is it at ground level?
What fraction of the original kinetic energy of puck dissipates during the collision, kinetic friction before is 40 m/s, kinetic friction after is 29.3 m/s
Find the change in entropy in the universe. Now, two identical ideal oxygen gases with the same pressure P=1 atm and the same number of particles N = 10^22, but di erent temperature T1 = 30 C and T2 = 40 C,
Determine the absolute pressure at the bottom of a lake that is 50 m deep. Write yor answer correct to two decimal paces let Patm = 101,300 Pa
A 4.8-m-diameter merry-go-round is initially turning with a 4.3 s period. It slows down and stops in 16 s. Before slowing, what is the speed of a child on the rim
An aluminum wire having a cross-sectional area equal to 2.70 10-6 m2 carries a current of 6.50 A. The density of aluminum is 2.70 g/cm3. calculate the drift speed of the electrons in the wire
Suppose you wish to fabricate a uniform wire out of 2.6 g of copper. If the wire is to have a resistance of R = 0.25 and if all of the copper is to be used, what must be the length of the wire in m and the diameter of the wire in mm.
A bomb, initially at rest, explodes into three fragments that move as shown. What is the mass, m, of each of the lower two fragments in kg
A muon with rest energy 106 MeV is created at an altitude of 4600 m and travels downward toward Earth's surface. What is the muon's total energy in the muon's frame of reference
If its length is 49.8 m when measured from inside the spacecraft, what is its length measured by a ground observer
Water flows from a fire truck through a hose that is 10.7 cm in diameter and has a nozzle that is 2 cm in diameter. what is the gauge pressure in the truck
A vacuum diode consists of a cylindrical cathode of radius 0.05cm, mounted coaxially within a cylindrical anode 0.45 cm in radius. Find its speed when it strikes the anode
Illustrate what is the average power of the elevator motor during this period? How does this amount of power compare with its power during an upright trip with constant speed?
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