Why do elements need to be heated to emit color?

A Solid, rectangular block of material floats on water is it possible that the block is pure gold?

The first satellite placed in orbit was? A. Explorer 1 B. Salyut 1 C. Sputnik 1 D. Sky Lab

Air resistance allow objects to develop full acceleration due to gravity true or false

Which of the following is true about the Solar System?

What do artists and scientists have in common? Creative thinking processes Clean laboratory environments Knowledge of computers Lack of imagination FYI this is for science class!

A stone is thrown vertically upward with a speed of 12m/s from the edge of a cliff 70 m high (a) How much later it reaches the bottom of the cliff? (b) What is its speed just before hitting? And (c) what total distance did it travel? (Ans: 5.

After completing a career search, Patrick has decided that he wants to be a paralegal. Which two skills or abilities are important for him to have in order to excel in this career?

The highest peak in the vicinity (<100 kilometers) of Mt. Kilimanjaro is located to the: a. north. b. west c. east. d. south. e. northeast

Which of the following lists contains only examples of renewable sources of energy? A. wind, tidal, geothermal, and hydroelectric B. coal, solar, wind, and biomass C. fossil fuels and nuclear energy D. hydroelectric, petroleum, solar, and wind

The part of a longitudinal wave that is least dense is called a (n) rarefaction refraction contraction compression