Why does a helium balloon float in air?

A. Helium is denser than air.

B. Helium is less dense than air.

C. The helium is under pressure in the balloon.

Do the atoms in salt follow a pattern? Explain your answer

Which objects are opaque? Check all that apply. textbook track shoes light bulb basketball lampshade

An airplane originally at rest on a runway accelerates uniformly at 6.0 meters per second2 for 12 seconds. During this 12-second intervai, the airplane travels a distance of approximately

Define velocity in terms of displacement

The frequency of a wave is 10 Hz. If the speed of the wave is 5 m/s, what is the wavelength? A. 0.5 m B. 2 m C. 10 m D. 50 m

8. A car moving at 35 m/s has 675 joules of KE. What is the mass of the car?

What force works against gravity as water infiltrates the soil and moves underground?

When is it safe for you to place a construction load on a concrete structure

You have two pendulums with cords that are exactly the same length. one is on earth (with an acceleration due to gravity of 9.81 meters/second2) and the other one is on the moon (with an acceleration due to gravity of 1.63 meters/second2).

The magnetic field is 0.0 2M from the wire is 0.1 T what is the magnitude of the magnetic field 0.0 1M from the same wire