Light is refracted when it crosses the interface from air into glass in which it moves more slowly. Since the light speed changes at the interface, the wavelength of the light must change, also. The wavelength decreases as the light enters the medium and the light wave changes direction.
The answer is C, an educated guess
The SI / Metric unit of force is the ' Newton '.
1 newton is the force that accelerates 1 kg of mass at the rate of 1 m/s² .
Answer:
His kinetic energy increases, potential energy decreases
The sum of kinetic and potential energy is a constant at any instant before he comes to rest.
Explanation:
Snowboarder is starting from a height and moving to the down direction. As he moves down his velocity increases, we know that kinetic energy is given by the expression , so as he moves his kinetic energy increases.
When the snowboarder is starting his potential energy is maximum(Potential energy = mgh), as he comes down his potential energy decreases.
Based on this we can conclude that the sum of potential energy and kinetic energy is a constant at any instant for a snowboarder before he comes to rest.
mgh+= Constant
Answer:
is the maximum safe load.
Explanation:
Given:
- diameter of the cylinder,
- thickness of the cylinder wall,
- maximum bearable stress,
Firstly we find that:
⇒ This is a thin cylinder.
<u>We know axial stress and hoop stress is given by</u>
⇒ Axial load will always be larger than the circumferential load under while other parameters are same.
<u>So we find the load in case of axial stress:</u>
is the maximum safe load.