Physics, 27.10.2020 16:20 barbaramathews1123

Escalator The escalator takes 20 seconds to carry the man between the two floors. The useful work done
against gravity is W. The useful power developed is P.
The lift takes 30 seconds to carry the same man between the same two floors.
How much useful work against gravity is done by the lift, and how much useful power is
developed by the lift?
useful work
done against
gravity by lift
useful power
developed by lift

Answers: 2

Show answers

Another question on Physics

Physics, 22.06.2019 02:40

If the wheels lock when braking suddenly the vehicle: a: loses traction b: lose steering wheel ability c: gain speed slightly d: gain steering ability

Answers: 1

Answer

Physics, 22.06.2019 04:30

Light that is polarized along the vertical direction is incident on a sheet of polarizing material. only 96% of the intensity of the light passes through the sheet and strikes a second sheet of polarizing material. no light passes through the second sheet. what angle does the transmission axis of the second sheet make with the vertical?

Answers: 2

Answer

Physics, 22.06.2019 13:40

Use the profile illustrated for problem (1). assume that the layer of silty sand fill (sm) is placed over the entire site. estimate the thickness of the fill (h - in feet) that will cause the effective vertical stress at the center of the clay layer to increase by 517.5 pounds per square foot.

Answers: 1

Answer

Physics, 22.06.2019 14:30

A10nc charge sits at a point in space where the magnitude of the electric field is 1500 n/c. what will the magnitude of the field be if the 10 nc charge is replaced by a 20 nc charge? assume the system is big enough to consider the charges as small test charges.

Answers: 1

Answer

You know the right answer?

Escalator The escalator takes 20 seconds to carry the man between the two floors. The useful work d...

Questions