Many particles, such as dust, are inhaled when people breathe. Which part of the respiratory system filters out the majority of these particles?

A. Nose

B. Alveoli

C. Trachea

D. Diaphragm

What is the answer to some ancient civilizations used units of measure based on the length of certain seeds. What kinds of problems might you expect with such a system?

Why is it that when the moon is farthest away from the sun, its the brightest? shouldn't it be the darkest if the earth's shadow blocks out the moon most of the time?

Hypertension occurred when blood pressure is too high. True or false?

A force that causes an object to change its motion is called? Unbalanced force Resistant force Compound force Unnatural force

A puppy finds a rawhide bone and begins to pull it with a force, Ft. The free-body diagram is shown. Which describes what happens to the bone? It begins to move toward the right. It stays in static equilibrium. It stays in dynamic equilibrium.

Which statement about subatomic particles is true? A. Protons, neutrons aND electrons all have about the same mass B. Unlike protons or neutrons, electrons have no mass C. Neutrons have no charge and no mass D.

You have a fish aquarium with the dimensions of 55cmx100cmx80cm. What volume of water should you put?

The thread around a screw is a lever.

What kind of process can create "rogue" waves? a. Constructive interference c. Refraction b. Destructive interference d. Standing waves

Why can't we see all types of waves in the electromagnetic spectrum?