Does the air in a balloon have masd

A horizontal pipe of diameter 0.937 m has a smooth constriction to a section of diameter 0.5622 m. The density of oil flowing in the pipe is 821 kg/m^3 .

How much energy is needed to heat up 1kg of water by 15degrees?

How does the electrical force relate to the charge of an object? 0 O 0 It is inversely proportional to the square of the charge. it is directly proportional to the square of the charge. It is inversely proportional to the charge.

An object-spring system undergoes simple harmonic motion with an amplitude A. Does the total energy change if the mass is doubled but the amplitude isn't changed (T/F)

What can one say for sure about element #99, Einsteinium (Es)) ? a) There's no such element! b) It is an alkali metal. c) It is radioactive. d) It has 253 neutrons. e) It increases one's 1. Q. slightly when swallowed.

Smaller bits of rock that pass through the atmosphere and slam into Earth's surface are called a. asteroids. b. meteors. c. meteorites. d. meteoroids.

What is the conversion from 1.2 mm to m

Which sentence contains italicized words that are used as an infinitive phrase? A. Kelly went to the grocery store. B. Tom went there for some flour. C. Mark wanted to go, but not today. D. Jane parked her car behind a truck.

The difference in electric potential between a thunder cloud and the ground is 1.53 108 V. Electrons move from the ground which is at a lower potential to the cloud which is at a higher potential.

A vitamin called folic acid is very important for neural tube development, which is the development of the baby's