Physics, 30.01.2021 01:10 unknown1246
A moving car has kinetic energy. To bring the car to rest, you must decrease its kinetic
energy to zero. The brakes do this work by applying a force over a distance. What effect would doubling the speed have on the braking distance? which of the following is correct
The braking distance would be 2 times greater.
The braking distance would be 2 times smaller.
The braking distance would be 4 times smaller.
The braking distance would be 4 times greater.
Answers: 2
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If we relied solely on the nonrenewable resources found in the u.s., which one would we run out of first at current usage levels? a. natural gas b. oil c. uranium d. coal
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Physics, 22.06.2019 12:50
Air is contained in a variable-load piston-cylinder device equipped with a paddle wheel. initially, air is at 400 kpa and 17°c. the paddle wheel is now turned by an external electric motor until 75 kj/kg of work has been transferred to air. during this process, heat is transferred to maintain a constant air temperature while allowing the gas volume to triple. calculate the required amount of heat transfer in kj/kg.
Answers: 2
Physics, 22.06.2019 19:00
If state law mandates that elevators cannot accelerate more than 2.40 m/s2 or travel faster than 14.8 m/s , what is the minimum time in which an elevator can travel the 373 m from the ground floor to the observatory floor? ?
Answers: 1
Physics, 22.06.2019 21:00
During a car accident, a 125kg driver is moving at 31m/s and in 1.5s is brought to rest by an inflating air bag. what is the magnitude of the change in momentum to the driver
Answers: 2
A moving car has kinetic energy. To bring the car to rest, you must decrease its kinetic
energy to...
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