Answer:
Explanation:
mass of the water being lifted per second
m = volume x density
= 6.2 x 1 = 6.2 kg
height by which water being lifted
h = 75 - 21
= 54 m
increase in potential energy of water per second
mgh
6.2 x 9.8 x 54
= 3281.04 J /s
= 3281.04 W.
Answer:
Motors are the most common application of magnetic force on current-carrying wires. Motors have loops of wire in a magnetic field. When current is passed through the loops, the magnetic field exerts torque on the loops, which rotates a shaft. Electrical energy is converted to mechanical work in the process
Explanation:
hope that helps!
Let m₁ = 3.0 kg and v₁ = + 8 m/s (so right is positive), and m₂ = 1.0 kg and v₂ = 0. The total momentum of the two balls before and after collision is conserved, so
m₁v₁ + m₂v₂ = m₁v₁' + m₂v₂'
where v₁' = + 5 m/s and v₂' are the velocities of the two balls after colliding, so
(3.0 kg) (8 m/s) = (3.0 kg) (5 m/s) + (1.0 kg) v₂'
Solve for v₂' :
24 kg•m/s = 15 kg•m/s + (1.0 kg) v₂'
(1.0 kg) v₂' = 9 kg•m/s
v₂' = (9 kg•m/s) / (1.0 kg)
v₂' = + 9 m/s
which is to say, the second ball is given a speed of 9 m/s to the right after colliding with the first ball.
The correct option is C.
According to the safety tips that is usually released by the government, it is typically advised that during a tornado, that people should go to the interior room on the lowest base of their houses, the room should be windowless. When in this room, it is advisable that one should get under a furniture that can not be easily damage and then use one's arms to protect the head and the neck.