Answer:
(a). Index of refraction are 
= 1.344 & 
= 1.406
(b). The velocity of red light in the glass 
2.23 ×
The velocity of violet light in the glass 
2.13 ×
Explanation:
We know that
Law of reflection is
Here
= angle of incidence
= angle of refraction
(a). For red light
1 × 
= × 
= 1.344
For violet light
1 × = × 
= 1.406
(b). Index of refraction is given by
= 1.344
2.23 ×
This is the velocity of red light in the glass.
The velocity of violet light in the glass is given by
2.13 ×
This is the velocity of violet light in the glass.
Acceleration is change in velocity over time --> 
Δv or change in velocity equals the Final velocity minus the initial velocity
Our initial velocity here is 60m/s while our final velocity is 0 m/s
The time interval is 85 seconds so...
The negative is there to indicate that the train in slowing down or decelerating
Answer:
No, according to Newton's first law of motion, the block cannot exert a force on itself, and the body will remain at rest unless unbalanced forces act on it
However according to Newton's third and first laws of motion the action of gravity pulling the block down the plane is equal to the reaction force of friction, preventing the motion
Explanation:
According to Newton's third law, the action force of gravity on the block tending to drag the block down along the inclined plane is equal to the reaction force of the frictional force of the inclined plane due to the interactions between the surfaces of the block and the plane which tends to prevent the motion of the block when both the component of the gravitational force down the plane and the frictional force are equal.
Because of the earth's large mass and solid structure, the skier moves but the earth does not.
<h3>Why can't the earth be moved?</h3>
- Because the Earth is such a massive body, it cannot be moved by applying force to it. Because it cannot be moved with a small amount of force
- The amount of matter contained in an object is what gives it inertia, or the tendency of matter to remain at rest if at rest, or to continue moving in the same direction at the same speed if moving.
- The greater an object's mass, the greater its gravitational force.
- Mass is the quantity that is solely determined by an object's inertia. The greater an object's inertia, the greater its mass.
- A heavier object is more likely to resist changes in its state of motion.
- we can conclude that the skier moves but the earth does not due to the large mass of the earth and its solid structure.
To learn more about earth refer to :
brainly.com/question/25624188
#SPJ9
Answer:
70 m/s
Explanation:
The frequency of earthquake = 2.0 Hz
The wavelength = 35 m
How fastbthw earthquake is t traveling is given bythw velocity of the wave, velocity of wave is related to frequency and wavelength using the formula :
V = frequency * wavelength
V = 2 * 35
V = 70 m/s
