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a concert loudspeaker suspended high off the ground emits 38w of sound power a small microphone with a 10 cm2 area is
a 0250 kg mass is moving on the end of a spring k 350 nm and is damped by a force fx -bvxa if the constant b 0860 kgs
a thin 17-m metal rod sustanins a longitudinal standing wave with vibration antinodes at each end of the rod there are
a ray of light is traveling in a glass cube that is totally immersed in water you find that if the ray is incident on
light traveling in air is incident on the surface of a block of plastic at an angle of 627o to the normal and is bent
four identical metallic objects carry the following charges 66 microc 34 microc -70 microc and -20 microc the objects
a fireman clings to a vertical ladder and directs the nozzle of a hose horizontally toward a burning building the rate
a plate carries a charge of -40 microc while a rod carries a charge of 10 microc how many electrons must be transferred
you would like to slow down your aging process by traveling very fast relative to earth on a spaceship what is the
an incandescent lightbulb emits 97 w of radiation if the filament is at a temperature of 2818 k what is the area of the
a room has dimensions of 42 m long 35 m wide and 24 m high what is the weight of the air in the room the density of air
the intensity of sunlight at the earths surface is about 10746 wm2 what is the total power emitted by the
a piece of metal when weighed in air has a weight of 207 newtons when completely submerged in blood density of
a batter hits a pitched ball when the center of the ball is 120 m above the ground the ball leaves the bat at an angle
a marathon runner is moving along the road at 10 ms in still air that is at a temperature of 340degc his surface area
a freezer has a coefficient of performance of 252 the freezer is to convert 190 kg of water at 260 celsius 190 kg of
a plane diving with constant speed at an angle of 530deg with the vertical releases a projectile at an altitude of 750
a jogger generates heat energy at a rate of 8082 w if all this energy is removed by sweating how much water must
an aluminum beam 86 m long and with a cross-sectional area of 0107 m2 is used as part of a bridge the beam is clamped
a wireless computer network transmits data across the space between nodes as a modulation of a 245ghz microwave carrier
consider a visual binary star system with a period of 5541 years its measured trigonometric parallax is 04217 and
a 0250-kg ball is dropped from a height 100 cm onto a spring if the spring constant is 600nm what is thea distance will
a moderate wind accelerates a pebble over a horizontal xy plane with a constant acceleration 580 ms2 700 ms2 at time
a telescope was used as a testbed for evaluating adaptive optics systems this telescope has a 358 meter primary mirror