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.

Describe how the size of the force of friction depends on the size of the normal force?

How do unicellular organisms grow? A. increase in cell size B. decrease in cell size C. increase in cell number D. decrease in cell number

A circular coil of 185 turns has a radius of 1.60 cm. (a) Calculate the current that results in a magnetic dipole moment of magnitude 1.79 A·m2.

While exploring a section of land far from the sea, an explorer discovers a dome-shaped geologic structure with gently sloping sides. Which of the following has the explorer most likely discovered?

What force causes static cling? What two types of charges does this force have?

Using the atomic symbol above report how many protons, neutron, and electrons an atom of neon contains.

Which of the following is not shorthand to describe one of the three types of ecological relationships? +/+ -/+ +/0 -/0

Which is a characteristic of an electromagnetic wave?

What does the ozone layer absorb? a. Microwaves c. UV radiation b. X-rays d. Infra-red radiation

An object is undergoing shm with period 0.900 s and amplitude 0.320 m. at t = 0 the object is at x = 0.320 m and is instantaneously at rest. calculate the time it takes the object to go (a) from x = 0.320 m to x = 0.160 m and (b) from x = 0.