How long is a half life for c14

You ask people to rate there depression on a scale of 1 to 10 their respnses are a (n) ___in your study. a. variable b. discrete v c. observation d. hidden v

Which population serves the function of primary consumers in a mountain area? A. Elk eat flowers. B. Aspen trees produce their own food. C. Gray wolves hunt, kill, and eat mule deer. D. Coyotes eat elk that were hunted and killed by gray wolves.

A train has a constant velocity of 2 m/s east. What is the magnitude of the horizontal acceleration of the train?

A person Drove from 8am Tuesday to 5pm Wednesday. Total drive 396 miles. He have lunch for 30 min on Tuesday and sleep overnight from 7pm Tuesday and go back to drive at 5am Wednesday. On Wednesday he have 30 min for lunch.

Why can we see our breath on a cold winter day

Use newton's first law to explain why book on a desk does not move

What is the mechanical advantage of the machine shown below? a 5 b 4 c 3 d 2

If a car has a speed of 85 m/s and travels for 120 seconds, how far does it go?

In the scientific method, a hypothesis is a

According to Kepler's second law, where in a planet's orbit would it be moving fastest? Where would it be moving slowest?