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a 20 cm x 20cm x 90 cm block floats in water with its long axis vertical the length of the block above water is 10cm
2a a 10 kg steel ball strikes a wall with a speed of 30 ms at an angle of theta37 with the normal to the ground it
a block of copper with mass 11153 g is lowered by a string into a large pail of water when the block is totally
if the angular velocity is held constant and the radius is doubled how does the force required
a 30-kg cylinder falls vertically from rest in a very tall evacuated tube 20m above the surface of the earth1 what is
a 410g lead bullet traveling at300ms is stopped by a large tree if half the kinetic energy of the bullet is transformed
an aluminum rod is165cm long at 20degc and has a mass of 350 g if14000j of energy is added to the rod by heat what is
an organ pipe open at one end has a length of 60 cm if the speed of sound in air is 340 ms what is the lowest frequency
a spinning disc rotating at 130 revmin slows and stops 31 s later how many revolutions did the disc make during this
a student drops two metallic objects into a 120 g steel container holding 150 g of water at 25degc one object is a 210
a solid sphere of mass 40 kg and radius 012 m starts from rest at the top of a ramp inclined 15 degree and rolls to the
a sphere that is a perfect blackbody radiator has a radius of 0120 m and is at 200degc in a room where the temperature
a styrofoam box has a surface area of 076 m2 and a wall thickness of 20 cm the temperature of the inner surface is
a glass windowpane in a home is 062 cm thick and has dimensions of 10 m multiplied by 19 m on a certain day the indoor
a 400kg baby grand piano is raised to the roof of a 100m building if the cable breaks as it reaches this height what
an aluminum cup contains 225 g of water and a 40 g copper stirrer all at 27degc a 410 g sample of silver at an initial
an aluminum rod is 180 cm long at 20degc and has a mass of 350 g if 12500 j of energy is added to the rod by heat what
suppose 238 l of an ideal monatomic gas at a pressure of 260 105 kpa is expanded adiabatically no heat transfer until
a football player kicks a 041-kg football initially at restand the ball flies through the air if the kickers foot was
a 300- goldfinch lands on a slender branch where it oscillates up and down with simple harmonic motion of amplitude
you rev your cars engine to 2600 a if you change the period of the engine to 0038 how many rpms is it
a 0004-kg bullet is fired into a 0200-kg block of wood at rest on a horizontal surface after impact the block with the
a 060- mass attached to a vertical spring of force constant 150 oscillates with a maximum speed of 030 find the
two infinite straight parallel wires each carrying current i in the same direction are coincident with the lines 10z