The Solar System formed from the ...

A. Collapse of an interstellar cloud

B. Collision of two massive stars

C. Explosion of an interstellar sun

D. Grouping together of asteroids

A light ray traveling from a higher index of refraction medium into a lower index of refraction medium (for example, from water into air) would bend away from the normal to the medium surface.

Sue observes a clear plastic, millimeter ruler under low power of her microscope. She sees three divisions of the ruler. What would be the field diameter of Sue's microscope on low power? (in micrometers ('µm')

The volume of a cuboid is the product of its length, breadth, and height. Give a possible metric unit for the volume. Is the unit for volume a basic unit or a derived unit?

Perihelion effect on gravity

It takes 100,832 J of work to lift an elevator 18.3 meters. If this is done in 21.0 seconds, what is the average power of the elevator during the process? Explain your answer.

What happens to the inertia of an object of its mass is decreased?

An object has an acceleration of 24 m/s/s. How long would it take the stationary object to reach a velocity of 6.8 m/s?

What is normal distribution in statistics?

Which of the following water samples would be considered acidic

A linearly-polarized electromagnetic (EM) wave has an electric field with amplitude 1000 V/m. You hold a a linear polarizer in front of it and rotate the polarizer so that all of the EM wave is blocked. You then rotate the polarizer 30 degree.