If a star contains a certain element, it can be determined by studying the star's

A. emission spectrum

B. corona

C. sunspot activity

D. main sequence

Are matter and weight the same thing?

How is a boomerang different from a airplane propeller

The distance of the earth from the sun is 93 000 000 miles. if there are 3.15 * 107 s in one year, find the speed of the earth in its orbit about the sun.

Expression to calculate pressure

A wave ripples through a large flag when the wind blows steadily. What is the wavelength of the wave if its frequency is 12.0 hertz and its speed is 12 meters per second?

Which activity involves using fossil fuels directly or indirectly? 1) eating fresh fruit for a snack 2) cooking hot dogs on a campfire 3) using crayons to color 4) walking to school

Which of the following objects would have the most inertia? A. A sphere with a radius of 5 cm and a mass of 34 grams. B. A sphere with a radius of 4 cm and a mass of 15 grams. C. A sphere with a radius of 8 cm and a mass of 27 grams. D.

A boy slides a book across the floor using a force of five and over a distance of 2M what is the kinetic energy of the book after he slides at assume there is no friction

Where would aliens be if they really do exist here on Earth?

If the mass of an object is 84g and the volume is 12cm3 what is the density