The u. s has sent unmanned spacecrafts to ___ the planets in our solar system

a. all

b. none of

c. some

d. most

(its not c nor d)

True or false was a prism refracts light, it separates out the various colors based on their wavelength

Which of the following stars would be the most luminous? 2. Yellow star 3. Red star 4. Blue star 5. Orange star

Without changing the force input, how can force output be increased?

How does temperature affect thermal energy?

Which energy-level change shown in the diagram below emits electromagnetic radiation with the longest wavelength? a) an electron moving from 4 to 5 b) an electron moving from 5 to 2 c) an electron moving from 6 to 1 d) an electron moving from 2 to 1

A lizard accelerates from 2 m/s to 10 m/s in 4 seconds. what is the lizard average acceleration

Explain the difference between balanced forces and action and reaction forces.

Describe and apply Newton's Three Laws

If you do 1000j of work on a system and remove 500j of heat from it, what is the change in its internal energy

Two children stretch a jump rope between them and send wave pulses back and forth on it. The rope is 4.5 m long, its mass is 0.42 kg, and the force exerted on it by the children is 71 N.