About how far does the S wave travel through Earth in 13 minutes?
2,000 km
4,000 km
6,000 km
8,000 km
Answer:
Explanation:
I just took the quiz on edge2020
Answer:
B
Explanation:
Answer:
2525000 microliters
Explanation:
Answer:
True
Explanation:
An optical fiber is like a glass tube with very small radius. The light travels through these fiber following Total Internal Reflection principle. The movement of the light is not affected by the external factor or the shape of the fiber as long as it is intact. Even if it is twisted or curved, the light will travel as long as the fiber is not damaged physically.
2. Describe two ways to change the
frictional force between two solids surfaces.
Change the lubrication between the two surfaces
Change the normal force between the two surfaces
3. How does air resistance affect the
velocity of a falling object?
4. What two sources of friction do you
have to overcome when you are walking?
5. If you push a chair across the floor
at a constant velocity, how does the force of friction compare with the force
exert? Explain.
6. If you push a book against a wall
hard enough, it will not slide down even though gravity is pulling it. Use what
you know about Newton’s laws of motion to explain why the book doesn’t fall.