The brightness of a star depends on its (color, composition of atmosphere, or distance from earth), and stars that are closer look (brighter, dimmer, or white).

(in parentheses is options)

Kyle is holding a nag of 250 jelly beans. when mark takes out two jellybeans, kyle is not able to tell a difference. this illustrates

What process did james hutton propose replenishes the rock on earth's surface?

Which description of an atom is accurate? A. a nucleus surrounded by protons and neutrons B. A nucleus containing electrons and protons C. Electrons encircling a nucleus with neutrons and protons D. Protons surrounded by neutrons and electrons

A 66.5-kg hiker starts at an elevation of 1270 m and climbs to the top of a peak 2660 m high. (a) What is the hiker? s change in potential energy? (b) What is the minimum work required of the hiker? (c) Can the actual work done be greater than this?

When waves strike an object and bounce off, what has occured

During combustion, a fuel's electromagnetic energy is converted into thermal energy.

Explain why glucose is important to a cell

4. How far does a car travel in 90 seconds if it is traveling at a speed of 55 m/s?

Total energy input is 1400 and my efficiency is 80% so what is the useful energy output in jules?

What is the force of gravity acting on a 2000-kg spacecraft when it orbits two Earth radii from the Earth's center (that is a distance r=6380 km above the Earth's Surface. The mass of the Earth is 5.98 x 1024 kg.