Why do helium balloons float? Talk about density of atoms and compare to elements in the air.

1. Name several constellations that are visible every night here in Bellingham, WA during all 12 months of the year. Why are these constellations always visible whereas others are seasonal?

If there were a great migration of people toward the earth's equator, would the length of the day get longer because of conservation of angular momentum?

If you do not receive enough calories, which occurs? 1. Gain weight 2. Too much sugar 3. Impaired metabolic processes 4. Maintain weight

If we have less power, we most likely have what?

If 2.0 mol of gas a is mixed with 1.0 mol of gas b to give a total pressure of 1.6 atm, what is the partial pressure of gas a and b?

For saving lives, what is the most important safely feature on a car a. air bag b. safely belt c. anti-lock brakes

An 1700 kg car is moving to the right at a constant speed of 1.50 m/s. (a) what is the net force on the car

Since there are no aurora observed on Venus we can conclude that Venus a. lacks atmospheric oxygen b. is too hot for magnetic forces. c. lacks a strong magnetic field. d. lacks strong winds.

A grocery shopper tosses a (n) 9.1 kg bag of rice into a stationary 19.3 kg grocery cart. The bag hits the cart with a horizontal speed of 6.6 m/s toward the front of the cart. What is the final speed of the cart and bag? Answer in units of m/s.

Where do most metamorphic rocks processes take place?