According to the law of reflection, when a ray of light reflects off a surface, the angle of incidence is equal to the angle of reflection.
So in the above situation, if the incident ray makes an angle of 65° with respect to the normal to the mirror's surface, the angle of reflected ray will also be equal to 65 degrees. The attached image will explain this better.
So the answer is,
c. 65 degrees
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
Because acceleration is constant, the acceleration of the car at any time is the same as its average acceleration over the duration. So
Now, we have that
so we end up with a distance traveled of
A) if energy is being absorbed, then more hydrogen bonds are being broken (melting). If energy is being released, more hydrogen bonds become fixed (freezing).
<span>b) during melting, hydrogen bonds get broken and movement can occur. During freezing, hydrogen bonds become fixed and water molecules cannot move as much.
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