I'm new to brainy, but here is my question.
2 answers:
Answer: 680 J
Explanation:
Andre's mechanical energy is given by:
where
K is the kinetic energy
U is the gravitational potential energy
The kinetic energy in this case is zero, because Andre is sitting, so its speed is zero: v=0, and the kinetic energy is
The gravitational potential energy is instead
So, the total mechanical energy is
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Light waves are reflected from front and back surfaces of the thin films and constructive interference between the two reflected waves occurs in different places for different wavelengths. Light shining on the upper surface of the thin film with thickness t is partly reflected at the upper surface (path abc). Light transmitted from the upper surface is partly reflected at the lower surface (path abdef). The two reflected waves come together at point P on the retina of the eye. Depending on the phase relationship, they may interfere constructively or destructively. Different colors have different wavelengths, so the interference may be constructive for some colors and destructive for others.
Answer:
Newton's Second Law of Motion
Explanation:
According to Newton's second law of motion, the change in velocity of a body is directly proportional to the force applied on it. Velocity is a vector quantity. It measures the magnitude of the speed as well as its direction.
F = m a
where, F is the applied force, m is the mass and a is the acceleration.
It can also be expressed as:
where, p = mv ( momentum)