Pure substances can be classified as blank or compounds

In what way does elevation affect climate? A. Air at higher elevations is more dense, and therefore it holds less heat. B. Air at higher elevations is less dense, and therefore it holds more heat. C.

Which of the following represents the velocity of a moving object? B. 40 m north A. 40 C. 40 m/s D. 40m/s north

Heptane is always composed of 84.0% carbon and 16.0% hydrogen. This illustrates the law of multiple proportions. conservation of mass. definite proportions. all of the above

Which variable is not required to calculate the gibbs free-energy change?

Which type of energy is converted into mechanical energy when a person walks? A. Electromagnetic B. Electrical C. Nuclear D. Chemical

What relates the net force exerted on an object to its mass and acceleration?

I'm a wave, the medium moves parallel to the direction that the wave travels

What is the wavelength of a wave that has a velocity of 32 m/s and a frequency of 60.6 Hz?

Two objects repel each other with a force of 8N. if

Mike walked 450 m west. He then turned and walked 150 m to the east in 300 seconds. what was his velocity?