Physics, 12.12.2020 17:00 mercedesamatap21hx0

A crane used 250,000 Joules of work to move a beam to the top of a building in 20 seconds. How much power did the crane use? a) 5,000,000 W
b) 5,000 W
c) 50 J
d) 12,500 W

Answers: 3

Show answers

Another question on Physics

Physics, 22.06.2019 12:10

Point charges q1 = 51 µc and q2 = −27 µc are placed 1.0 m apart, with q2 on the right. what is the force (in n) on a third charge q3 = 19 µc placed midway between q1 and q2? (assume the positive direction is to the right. indicate the direction with the sign of your answer.)

Answers: 3

Answer

Physics, 22.06.2019 16:00

Amichelson interferometer operating at a 600 nm wavelength has a 3.02-cm-long glass cell in one arm. to begin, the air is pumped out of the cell and mirror m2 is adjusted to produce a bright spot at the center of the interference pattern. then a valve is opened and air is slowly admitted into the cell. the index of refraction of air at 1.00 atm pressure is 1.00028.how many bright-dark-bright fringe shifts are observed as the cell fills with air?

Answers: 1

Answer

Physics, 22.06.2019 16:40

Atriangle with equal sides of length 10 cm has -2.5-nc charged objects at each corner. part a determine the direction of the electrical force exerted on the object at the top corner due to the two objects at the horizontal base of the triangle. determine the direction of the electrical force exerted on the object at the top corner due to the two objects at the horizontal base of the triangle. horizontally rightward vertically downward vertically upward horizontally leftward

Answers: 1

Answer

Physics, 22.06.2019 21:10

A10-kg isto a of 10 m at aa0.9 kg/m.30 kg of ,at aas10-m .. ( 9.8 m/s2 g.)

Answers: 3

Answer

You know the right answer?

A crane used 250,000 Joules of work to move a beam to the top of a building in 20 seconds. How much...

Questions