- The work done by the pump is 13475 J.
- The power of the pump is 385 W.
<u>Explanation:</u>
When a force causes a body to move work is being done on the object by the force. Work is the measure of energy transfer when a force moves an object through a distance. The work done is the product of mass, gravity, and height.
Work done = m * g * h
= 55 * 9.8 * 25
Work done = 13475 J.
Power is defined as the rate of doing work with time.
Power = work done / time
= 13475 / 35
Power = 385 W.
Answer
given,
focal length of lens A = 5.77 cm
focal length of lens B= 27.9 cm
flies distance from mirror = 11.3 m
now,
Using lens formula
q =11.79 cm
image of lens A is object of lens B
distance of lens = 59.9 - 11.79 = 48.11
now, Again applying lens formula
q' =66.41 cm
hence, the image distance from the second lens is equal to q' =66.41 cm
Answer:
Explanation:
Let Torque due to friction be
F
Net torque
= 46 - F
Angular impulse = change in angular momentum
=( 46 - F ) x 17 = I X 580
When external torque is removed , only friction creates torque reducing its speed to zero in 120 s so
Angular impulse = change in angular momentum
F x 120 = I X 580
( 46 - F ) x 17 = F x 120
137 F = 46 x 17
F = 5.7 Nm
b )
Putting this value in first equation
5.7 x 120 = I x 580
I = 1.18 kg m²
All forms of matter are comprised of atoms. Wind in itself is the movement of particles(air). Wind does not have particles since it is an action and not a form of matter.
