Which of the following is an example of heat transfer by radiation?

A. A fire warming a group of campers

B. An electric space heater warming a room

C. The Sun warming the Earth

D. All of these

Which of the following are examples of radiation? (Choose all that apply)

What would happen if we didnt use units when measuring?

Horseshoe bats (genus Rhinolophus) emit sounds from their nostrils, then listen to the frequency of the sound reflected from their prey to determine the prey's speed.

Newton discovered that gravity affects the orbits of planets True Or False

What color does the star alpha centauri appear to be? a. red c. blue b. yellow-white d. blue-orange?

What is the energy equivalent of 0.026 kg?

Which of the following materials requires the most amount of heat to raise (or lower) its temperature by one degree Celsius? Assume we have the same amount of each material, 10 grams. Feel free to reference Table 14.1 in the OpenStax textbook.

If we decrease the amount of force applied to an object, and all other factors remain the same, the amount of work completed will A decrease. B increase. C increase, then decrease. D not change.

Passing an electric current through a certain substance produces oxygen and sulfur. This substance cannot be a (n)

The atomic mass of an element is A. The average mass of all the isotopes of the element B. A measure of the density of that element C. The mass of the most common isotope of that element D.