Why does a balloon filled with hydrogen rises up only to a certain height

As the video states, a person weighs less on the moon than on the earth. Discuss why gravity is a benefit. What would it be like if the force of gravity were stronger? What if it were equal to that of the moon? Why are gravity and weight related?

How fast does a 3 kg rocket accelerate if a force of 140 N is applied?

When cars are equipped with flexible bumpers, they will bounce off each other during low-speed collisions, thus causing less damage. In one such accident, a 1850 car traveling to the right at 1.40 collides with a 1350 car going to the left at 1.10.

A train travels 225 kilometers in 2.5 hours. what's the trains average speed

A car travels 2.5 hours in a northernly direction for 300 km. determine the cars speed and velocity. time= distance= direction=

What happens to the wavelength of a wave if you increase the frequency?

In a transverse wave, the particle motion is what to wave motion? A. perpendicular B. parallel

Which agent of weathering breaks down limestone statues?

A charged particle moves at 2.5 * 104 m/s at an angle of 25° to a magnetic field that has a field strength of 8.1 * 10-2 T. If the magnetic force is 7.5 * 10-2 N, what is the magnitude of the charge?

Earthquakes along the subduction zones near Sumatra and Chile are some of the strongest in the world.