Why does paper stand up when a van de graaf generator is on?

A hair dryer is a pump for air. Do a battery and a Genecon act like pumps for charge? Yes No

In Hooke's law, what does the x represent? A. the thickness of the spring B. the length of the spring C. the displacement of the spring D. the distance from stretched to compressed E. the equilibrium distance

3. Which form of radiation is used to kill microorganisms? a. microwaves b. visible light c. infrared rays d. ultraviolet rays

The 0 horizon in a soil profile is?

How important are volcanoes in adding carbon dioxide to the atmosphere

Compare and contrast the terms melting and freezing

A medical cyclotron used in the production of medical isotopes accelerates protons to 6.5 MeV. The magnetic field in the cyclotron is 1.9 T.

What is the speed of sound in a vacuum?

An object has 60 j of potential energy and 40 j of kinetic energy. then 10 j of the potential energy is converted into kinetic energy. how much work was done on the object?

At what height above earth's surface is the gravitational acceleration reduced from its sea-level value by 0.40%?