"what scientific principle is the mercury barometer based on"

Which is an example of gaining a static charge by conduction? a) rubbing a balloon against your hair. b) shuffling your shoes across a carpet. c) bringing a charged rod near an electroscope. d) touching your car on a cold day and getting a shock.

Which of the following bonds would be most polar? a. c-i b. c-br c. c-cl d. c-f e. c-o

What is the magnitude of the gravitational force acting on the earth due to the sun?