Chemical testing of water

How is the smell from a stinky diaper similar to the electric field produced by a charge

When energy is transferred between substances what happens to their temperatures?

Which best describes the difference between internal and thermal energy? Internal energy is the total potential energy in a substance, and thermal energy is the total kinetic energy in a substance.

A kid moving 3.78 m/s jumps on a slip & slide (uk=0.111). after sliding 5.00 m, what is his velocity?

If a single strand of DNA were stretched out, how far would it reach?

The Law of Gravitation was mathematically defined by who?

If two cars had the same engine, which delivered the same force to the wheels, but the first car was more massive than the second would the cars perform differently?

The two subspecies ties of astronomy are

Which best explains why scientific theories grow stronger over time?

Which of the following simple machines is not properly identified? A. Scissors: lever B. Pizza cutter: wedge C. Screw: wheel and axle D. Ramp: inclined plane