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

If you must do positive work to bring a charged balloon toward a negatively charged sphere, is the charge on the balloon positive or negative? Or can it have any sign?

What is the awnser to Blank occurs when a substance changes from a liquid to a gas

Learning to think critically and explaining your answers are part of the__and __ dimensions of development. A) Moral; physical B) Cognitive; physical C) Cognitive; moral D) Moral; schematic

The sketch shows a painter's scaffold in mechanical equilibrium. The person in the middle weighs 225 N, and the tension in each rope is 300 N. What is the weight of the scaffold?

Pin worms, tape worms, and hook worms are examples of A. rickettsiae. B. protozoas. C. metazoas. D. cocci.

A glass window is a clear object that light passes through as it travels in a straight line. This is a good example of A. refraction of light. B. transmission of light. C. absorption of light. D. reflection of light.

Why is net force a vector sum A. All forces have direction and magnitude B. Forces can only be attractive C. All forces are contact forces D. There are four fundamental forces

Does the elf owl's small size allow it to live in cacti

If grapefruit juice has a ph of 3.0 and egg white have a ph of 8.0, which contains more h + ions? how many more?

Consider a single photon with a wavelength of λ, a frequency of ν, and an energy of e. What is the wavelength,? Consider a single photon with a wavelength of λ, a frequency of ν, and an energy of e.