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two co-centric hollow spheres have radii of r1 and r2 and have uniform surface charge densities s1 and s2 the two
one and one-half moles of an ideal monatomic gas expand adiabatically performing 7910 j of work in the process what is
a heavy but uniform rope of length l is suspended from a ceiling a particle is dropped from the ceiling at the instant
a steel rod of mass m and length l has the linear expansion coefficient x it is standing vertically and supports a box
a 1000kg car is moving at a constant speed of 7 ms when it hits the back bumper of another car with 1200kg of mass
a child makes a ramp to push his toy dump truck up to his sand boxif he uses 5 newtons of force to push his 12 newton
a horizontal force of 80n acts on a mass of 6 kg resting on a horizontal surface the mass is initially at rest and
block sliding into spring a block of mass m 55 kg is released from rest at a height of h 30 m on a curved
one end of a metal rod is in contact with a thermal reservoir at 691 k and the other end is in contact with a thermal
a 127-kg block initially slides at 131 ms on a flat rough surface and eventually stops if the block cools to the
an outboard motor for a boat is cooled by lake water at 147degc and has a compression ratio of 149 assume that the air
with each cycle a 2550-w engine extracts 2180 j from a thermal reservoir at 877degc and expels 1570 j into a thermal
a grating has 350 rulingsmm and is illuminated at normal incidence by white light a spectrum is formed on a screen 30cm
a 20g lead bullet at 0 c is fired into a large block of ice at 0c in which it becomes embedded what speed would result
a goalkeeper kicks a ball of mass 400 g in the air which reaches a position of height 159 m above the ground
a ball swings in a vertical circle at the end of a rope 150 mlong when the ball is 369deg past the lowest point on its
suppose there are two point charges one has a charge of 155 10-6 coulombs and they are separated by a distance of 200
an object of size 70 cm is placed at 27 cm in front of a concave mirror of focal length 18 cm at what distance from the
a horizontal force of 80 n acts on a mass of 6 kg resting on a horizontal surface the mass is initially at rest and
a child looks at a reflective christmas tree ball ornament that has a diameter of 90cm and sees an image of her face
an 500 n box is pulled 250 m up a 350deg incline by an applied force of 1000 n that points upward parallel to the
a 74 kg man in a 50 kg chair tilts back so that all the weight is balanced on two legs of the chair assume that each
a flight attendant pulls her 75 n flight bag a distance of 305 m along a level airport floor at a constant velocity the
a car with 60 cm diameter tires is traveling at a constant speed of 100 kmhr what is the angular velocity of the tires