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an astronaut at rest on earth has a heartbeat rate of 70 beatsmin when the astronaut is traveling in a spaceship at
a deep-space probe moves away from earth by a speed of 078c an antenna on the probe requires 40 s in probe time to
a balloon is filled with 465 liters of helium at a pressure of 110 atm and a temperature of 265deg ca discover the mass
water is moving with a speed of 5ms during a pipe with a cross-sectional area of 4 cm 2 the water gradually descends
a block of wood floats in fresh water with two-thirds of its volume v submerged and in oil by 090v submerged discover
a lens appears greenish yellow lambda 570 nm is strongest when white light reflects from it what minimum thickness of
a350 kg child starting from rest slides down a water slide with a vertical height of 196 mneglect friction1 what is the
a 275 centimeter high object is located 35 centimeter in front of a concave mirror if the image is 50 centimeter high
radioactive oxygen-15 decays at such a rate that half the atoms in a given sample decay each two minutes if a tube
a uniform rod of mass 15 kilogram and length 05 meter leans against a vertical frictionless wall the coefficient of
a bubble placed 0130 meter beneath the surface of a glass of diet pepsi rises to the surface the air pressure at the
one of the most efficient engines ever built is a coal-fired steam turbine in the ohio valley driving an electric
a specific engine has a output power of 600 kw and an efficiency of 290 percent suppose the engine expels 8000 joule of
a 19 kilogram mass is attached to a spring with a force constant of 59 nm if the mass is released with a speed of 037
neglect air resistance for the followingcompute the escape velocity for a planet whose mass is 300 xnbsp 1024 kilogram
a projectile launched vertically from the plane of the moon rises to an altitude of 370 kilometer determine what was
a car engines has an efficiency of 25 percent and produces an average of 23000 joule of mechanical work per sec during
a prospector finds a solid rock composed of granite rho 2650 kgm3 and gold the volume of the rock is 295 10-4 m3 and
a student wants to use a meter stick as a pendulum he plans to drill a hole through the meter stick and suspend it from
a 120 kilogram box resting on a horizontal frictionless surface is attached to a 500 kilogram weight by a thin light
inside the cylinders of a diesel engine the mixture of fuel and air is compressed to about 120 of its original volume
gasoline flows through a horizontal pipeline with a flow rate of 25 ft 3 min a pressure gauge measures the pressure to
two waves of the equal frequency have amplitudes 213 and 136 they interfere at a point where their phase difference is
in 0785 second a 745-kilogram ball is pulled through a distance of 365 meter on a frictionless horizontal surface
the largest barometer ever built was an oil-filled barometer constructed in leicester england in 1991 the oil had a