Calculate the refractive index of the substance if the speed of light in the medium is 210,000 km/s.

2.43

1.43

0.7

1.89

A wave has a wavelength of 13 mm and a frequency of 20 hertz. what is it speed?

two object (mass A & B) are connected by a light string that passes over a frictionless pulley. The object (mass B) is held at rest on a fixed incline of angle = 40 and mass B is left hanging at rest above the floor.

What is the smallest possible number of products in a decomposition reaction?

Suppose you are jumping on a trampoline. At your maximum height, your potential energy is (highest or lowest) and is (highest or lowest). your kinetic energy

A 180 meter long train, travelling at a constant speed, is passing a car driving on an adjacent lane at a speed of 72 km/h. Knowing that the overshoot lasted 60 seconds, what is the speed of the train in km/h?

Select the statement that best describes how the forces relate. A. The object on which they are acting and the distance to that object determines the amount of force. B.

A block with m = 300 grams oscillates at the end of a linear spring with k = 6.5 N/m. (assume this is a top-down view and the block is sliding on a frinctionless surface;

What changes would a cold front bring to an area with warm, dry weather? extended period of rain or snow several days of gray skies dry air and sunny skies rain or thunderstorms

Candace is a confident, disciplined, motivated, hardworking team player. She pushes her teammates to perform to their full potential but guides them and does not control them. What does Candace's commitment to her team show?

Windows that look into bathrooms are often translucent instead of transparent. Why?