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Each question below is unique and do not borrow information from a previous part.
a. Sometimes farmers use barrels of hot water to keep their barns warm in the winter. How much heat would need to be removed from a barrel (42L) for it to go from 90 oC water to 0oC ice?
b. A molecule of nitrojen gas at 300K has how much KE (on avarege)?
A train is travelling up a 4.5 degree incline at a speed of 3.25 m/s when the last car breaks free and begins to coast without friction. a) How long does it take for the last car to come to rest momentarily? b) How far did the last car travel befo..
A landing craft with mass 12,500 kg is in a circular orbit5.75*105 m above the surface of a planet. Theperiod of the orbit is 6000 s. Theastronauts in the lander measure the diameter of the planet to be9.60*106 m.
A volume of 1 m3 of saturated liquid water at 200 °C is expanded isothermally in a closed system until its quality is 80 percent. Decide the total work (in kJ) produced by this expansion.
an object which is initially at rest on a frictionless horizontal surface is acted upon by four constant forces. f1 is
An electron beam is accelerated during a potential of 5.0 kV such that the electrons all have essentially the same speed in the same direction. Compute the DeBroglie wavelength for the electrons.
A 5.00-g bullet is shot through a1.10-kg wood block suspended on a string2.00 m long. The center of mass of the block rises a distance of0.45 cm. Find the speed of the bullet asit emerges from the block if its initial speed is 398 m/s.
Mary needs to row her boat across a 190-m wide river that is flowing to the east at a speed of 1.5m/s. Mary can row with a speed of 2.0m/s. What is her speed with respect to the shore
A 2.60×104- rocket blasts off vertically from the earth's surface with a constant acceleration. How far is the rocket above the earth's surface when it breaks the sound barrier
An object is formed by attaching a uniform, thin rod with a mass of mr = 6.55 kilogram and length L = 5.16 meter to a uniform sphere with mass ms = 32.75 kilogram and radius R = 1.29 meter. Compute the moment of inertia of the object about an axis ..
The dummy in a crash test has a head of mass 3 kg. The dummy is strapped in firmly so that the body does not move. The car's forward speed changes from 24 m/s to zero in 0.23 s.
A professor's office door is 0.99 m wide, 2.2 m high, 4.2 cm thick; has a mass of 27 kg, and pivots on frictionless hinges. what is its angular acceleration immediately afterward
After the collision, the blue puck has a velocity of 2i – 2j m/s. Illustrate what is the velocity of the gold puck after the collision?
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