Pure substances can be separated by physical means.

A. True

B. False

which statement about waves is false? a. waves transfer matter b. waves can change direction c. waves can interact with each other d. waves can transfer energy to matter

True or false the sun produces energy through nuclear fusion

Minerals are inorganic substances that the body cannot produce on its own.

How much work is done by moving a 20kg object 20m using a force of 100 newtons parallel to the direction of motion?

Lindsay is boiling macaroni noodles in a pot of water. The noodles rise and fall as the thermal energy currents move from areas of higher energy to areas of lower energy.

At a certain location, the horizontal component of the earth's magnetic field is 2.5 * 10-5 T, due north. A proton moves eastward with just the right speed for the magnetic force on it to balance its weight. Find the speed of the proton.

An acrobatic airplane performs a loop at an airshow. The centripetal acceleration the plane experiences is 14.7 m/s2. If it takes the pilot 45.

Which of the following was NOT an outcome of Bacon's rebellion? A. A more direct focus on the "Indian Problem" B. A more focused plain to isolate black slaves from white servants C.

A science class did an investigation to see how many breaths it took for each student to blow up a balloon. Jason blew up his balloon with the fewest breaths. Which of these might explain why Jason took fewer breaths to blow up his balloon? A.

How the behavior of waves is affected by a medium