At the highest point on the path of a projectile, its vertical ...

[jazziefee]

At the highest point on the path of a projectile, its vertical acceleration
 a. equals g pointing downwards
  b. equals g pointing upwards
  c. is zero
  d. is undetermined
  e. does not exist

Question 2

On page 526 of your textbook, you learned that one gram of radium produces over a million times the radiation as does one gram of uranium. This means that a much larger fraction of radium atoms are undergoing radioactive decay each second than for uranium. How does the half-life of radium compare to the half-life of uranium?
 a. The half-life of radium is much smaller than the half-life of uranium.
  b. The half-life of radium is the same as the half-life of uranium.
  c. The half-life of radium is much larger than the half-life of uranium.
  d. The information is insufficient to answer the question.
  e. The half-life of the radium is shorter at first, but gets longer as the radium sample is depleted.

[joechoochoy]

Answer to Question 1

A

Answer to Question 2

a

[jazziefee]

Excellent

[nguyenhoanhat]

TYSM