Physics, 22.04.2021 20:00 mimithurmond03
1. An 18.0 kg sled is slding across a smooth, flat stretch of snow when a boy pushes it, causing it to
speed up to 4,50 m/s in 3.75 s without changing direction. If the average force exerted by the boy
on the sled in its direction of motion was 12,5 N, with what initial velocity was it moving?
Answers: 2
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Although light from the sun appears white, it is actually made up of a lot of different colors. this portion of the electromagnetic spectrum, we call white light is referred to as within the electromagnetic spectrum.
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Air enters a gas turbine with two stages of compression and two stages of expansion at 100 kpa and 17°c. this system uses a regenerator as well as reheating and intercooling – the intercooler returns the air to the inlet temperature. the pressure ratio across each compressor is 4 ; 300 kj/kg of heat are added to the air in each combustion chamber; and the regenerator operates perfectly while increasing the temperature of the cold air by 20°c. determine the system’s thermal efficiency. assume isentropic operations for all compressor and the turbine stages and use constant specific heats at room temperature. (0.378)
Answers: 3
Physics, 22.06.2019 18:30
Both speed and velocity measure how fast something is moving. however, since speed is not a it does not require a(n question 6 options: a) quantity , unit b) magnitude, unit c) scalar, direction d) vector, direction
Answers: 2
1. An 18.0 kg sled is slding across a smooth, flat stretch of snow when a boy pushes it, causing it...
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