Tiffany leaves several balloons filled with helium gas inside her car on a sunny day. When she returns to her car, some of the balloons are much larger and a few have popped. Explain what happened.

A long wire carries a current toward the south in a magnetic field that is directed vertically upward. What is the direction of the magnetic force on the wire?

What effect does the vertical acceleration have on the horizontal velocity of the projectile?

What is the next deal if the data from an investigation do not support the original hypothesis

How fast must a 6 kg cat run to have kinetic energy of 150 j?

8. A baseball batter angularly accelerates a bat from rest to 20 rad/s in 40 ms (milliseconds). If the bat's moment of inertia is 0.6 kg m2, then findA) the torque applied to the bat andB) the angle through which the bat moved.

Protons and neutrons strongly attract when they

How far is Jupiter from the sun?

Steam moves into a cylinder of a steam engine at a constant pressure and does 2.34 J of work on a piston. The diameter of the piston is 3.4 cm and the piston travels 4.6cm. What is the pressure of the steam?

Identify each type of simple machine.

A car's speedometer reads 20 m/s after accelerating, from a standing start, for 25s. What was the magnitude of its acceleration?