Proton: symbol P, + 1
neutron: symbol n, 0
Electron: symbol e, -1
slow down, turn your windshield wipers and headlights on, create a bigger space between you and the car in front of you.
Answer: 552.5 watts
Explanation:
Given that,
Weight of man = 956 N
Height (h) = 2.41 m
Time taken (t) = 4.17 seconds
Power = ?
Recall that power is the rate of work done per unit time i.e Power = work/time
Thus, power = (mgh) / t
(Since weight = mass x acceleration due to gravity)
Power = (weight x height)/ time
Power = (956N x 2.41 m) / 4.17s
Power = 2303.96/4.17
Power = 552.5 watts
Thus, 552.5 watts of power is generated.
Answer : The correct option is, 2880 J
Solution :
According to the question,
K.E + Energy lose to friction = P.E
where,
m = mass of object = 60 Kg
g = acceleration due to gravity =
h = height = 10 m
v = velocity of an object = 10 m/s
Now put all the given values in the above formula, we get the energy lost to friction.
Therefore, the amount of energy she lose to friction is, 2880 J
By reading the fine details of the question, carefully and analytically, I have determined that there's no list of modifications to choose from.
The strength of the magnetic field of a solenoid depends on the electric current in its coil windings, the number of wire turns in its coil windings, and the material in its core.
In order to <em>DE</em>crease the strength of its magnetic field, any one or more of these steps could do the job:
-- DEcrease the electric current in its coil windings. This can be accomplished by decreasing the voltage of the power source that energizes the coil, and/or increasing the resistance of the wire in the coil.
-- DEcrease the number of wire turns in the coil.
-- If the solenoid has anything in its core, change the core to something with a lower magnetic 'permeability'. An Iron core will produce the greatest magnetic field strength. Air, vacuum, or NO core will produce the lowest magnetic field strength.