(power)
kinetic energy
law of Conservation of Energy
energy
(mechanical)
(potential energy)
gravitation or gravity
work
(I don't know the last one; it's somebody's law)
A materiel that allows electricity to flow easily is called an conductor
Answer:
Explanation:
Let F be the force applied by Ricardo
work done by him = force x displacement
= F x 54 unit
output of work
= mgh , m is mass of luggage , h is height by which luggage is lifted .
= 645 x 32 x 4.5
= 92880 ft-poundal.
According to question
output / input = .95
92880 / (F x 54) = .95
F = 1810.52 poundal.
Answer:
(a) 1782 Hz (b) 2178 Hz
Explanation:
The predominant frequency =1980 Hz
The speed of the police car =34.3 m/sec
The speed of sound in air =343 m/sec
(a) When the car moves towards you
According to Doppler's effect
(b) When the car moves away from you
Answer:
a. Object 1 exerts a 10 newton force on object 2 in the direction of its 1 meter displacement.
Explanation:
