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the air in some caves contains radon gas 222rn which can lead to lung cancer from a prolonged exposure in some irish
a uniform magnetic field is normal to the plane of a circular loop 11 cm in diameter and made of copper wire of
to compare the efficiency of a microwave with the efficiency of an electric kettle joey placed 500 ml of water into
a 1000w microwave a 400 w fluorescent light bulb and a 550w computer are plugged into a 120v parallel circuit what is
object o stands on the central axis of a concave spherical mirror at a distance of 36 cm the distance between the focal
suppose a rock is launched straight upward with a speed of 2483 ms from the surface of another planet 295 seconds
frank is nearsighted and his glasses require a prescription of -16 d one day he cant find his glasses but he does find
a pendulum of the length l is suspended from the ceiling of an elevator when the elevator is at rest the period of the
the focal length of a lens is inversely proportional to the quantity n - 1 where n is the index of refraction of the
at a distance of 19 m from a sound source the intensity level is 98 db what is the intensity level in db at a point 37
a 523-kg aluminum block density 270 x 103 kgm3 is suspended from a spring scale and is submerged into an unknown fluid
a solid sphere rolls down an incline plane without slipping if the center of mass of the sphere has a linear
1 a nail gun fires a nail into a piece of wood the nail is going a velocity of 68 ms right before entering the wood the
1 suppose that a guitar string has a length of 07 rn a mass of 0 14 kg and a tension of 205 n what is the mass per unit
a researcher observes hydrogen emitting photons of energy 0661 ev what are the quantum numbers of the two states
a photograph is properly exposed when the aperture is set to f8 and the shutter speed is 1110 s find the approximate
tarzan swings on a 282 m long vine initially inclined at an angle of 20 degrees from the verticala what is his speed at
1 you drive past a potential parking space in center city your new car is travelling at 85 the speed of light if your
a 17 kg ball strikes a wall with a velocity of 85 ms to the left the ball bounces off with a velocity of 73 ms to the
a 675 kg ice skater moving to the right with a velocity of 280 ms throws a 018 kg snowball to the right with a velocity
a 015 kg baseball moving at 2620 ms is slowed to a stop by a catcher who exerts a constant force of -386 na how long
you are driving home from school steadily at 95 kmh for 180 km it then begins to rain and you slow to 65 kmh you
a small object is placed to the left of a convex lens and on its optical axis the object is 30 cm from the lens which
you place an ice cube in a microwave oven if it requires 32255 j to melt the ice cube and the oven delivers 118 w of
a man does 4750 j of work in the process of pushing his 260 103 kg truck from rest to a speed of v over a distance of