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Traveling at a speed of 14.1 m/s, the driver of an car suddenly locks the wheels by slamming on the brakes. The coefficient of kinetic friction between the tires and the road is 0.500. Find the speed of the automobile after 1.16 second has elapsed? Neglect the effects of air resistance.
To compare the relative efficiency of glass and air as insulators, repeat the previous problem with a 0.35-centimeter-thick layer of air instead of glass. Find by what factor is the rate of heat transfer reduced
When resting, a person has a metabolic rate of about 3.0 105 joules per hour. The person is submerged neck-deep into a tub containing 1.12 103 kg of water at 22.10° C. find the water temperature after half an hour
A wind turbine is initially spinning at a constant angular speed.As the wind's strength gradually increases, What is the initial angular velocity of the turbine
A certain automobile engine is performing work at the rate of 28300 W (38 hp) with an efficiency of 23%. At what rate is heat being expelled by the engine
two identical 21.4-kg spheres of radius 14 cm are 27.6 cm apart center-to-center distance.a if they are released from
while walking between gates at an airport you notice a child running along a moving walkway. estimating that the child
A highway curves to the left with radius of curvature of 44 m and is banked at 29degrees so that cars can take this curve at higher speeds. Consider a car of mass 1387 kg whose tires have a static friction coefficient 0.68 against the pavement.
A ball is thrown straight upward and reaches the top of its path in 1.71 s (before it starts to come back down). At what speed must the second ball be thrown
The water cooling system in a car engine that carries hot water from the engine block to the radiator is an example of cooling by: Transfer ? Conduction ? Convection or Radiation?
A 50.0 kg child stands at the rim of a merry-go-round of radius2.05 m, rotating by an angular speed of 3.25 rad/s. What minimum coefficient of static friction is required? What is the child's centripetal acceleration?
The electricity received at an electricsubstation has a potential difference of 2.80 105 V. Ifthe required output is 440 V, what should be the ratio of the turns of the step-down transformer
a diffraction grating is illuminated simultaneously with red light of wavelength 660 nm and light of an unknown
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