Explain why a sewing needle can float on the surface a water in a glass

What kind of energy does a light bolt have?

Which is a way to express concentration of a solution? parts per billion moles molar mass force per square meter

Food has chemical potential energy, which is the energy stored in the bonds between two atoms. This energy is released when what occurs?

What is the difference in electrical potential energy between two places in an electric field? a. current b. resistance c. potential difference d. induction

Match the simple machine with the correct definition. 1.___pulley 2.___wedge 3.___first - class lever 4.___screw 5.___Inclinded plane 6.___second - class lever 7.___wheel and axle 8.___lever 9.___third - class lever A. any slanting, flat surface B.

If a car goes along a straight road heading east and speeds up from 45 ft/s to 60. ft/s in 5 sec, calculate the acceleration

To generate higher profit margins, producers must work to increase their total supply. increase their total expenses. decrease their customer base. decrease their production costs

Solar energy isn't usually used as the only power source for a reason because what

What particle can be stopped by skin

What was significant about the atomic theory that democrituis proposed?