Which characteristic is used to measure the amount of light radiated by a star?

size

color

luminosity

temperature

An object moving to the right at makes an elastic head-on collision with a object moving in the opposite direction at. what is the velocity of the object after the collision

A proton is released in a uniform electric field, and it experiences an electric force of 2.36*10-14 N toward the south. (a) What is the magnitude of the electric field? (b) What is the direction of the electric field?

How does a reflecting telescope work

When a piece of wood burns, it makes heat, light, and ash. Therefore, it is an example of what type of change

A ball hits a wall. What is true about the magnitude of the force experienced by the ball compared with the force experienced by the wall?

Which of the following are the top two job expectations of people who career plan? Select all that apply. A. Hours B. benefits C. type of work D. coworkers E. security

Define the term volt.

A baseball player was hit by a baseball in the left eye and complains of double vision. What should you do? A. Restrict spinal movement B. Assess pupillary response C. Perform a detailed exam D. Apply ice to orbit

An approaching storm is moving at 15 km an hour what do you need to know to determine its velocity

How did astronomers precisely determine the length of an Astronomical Unit in the 1960s?