Author Question: At the highest point on the path of a projectile, its vertical acceleration a. equals g pointing ... (Read 243 times)

jazziefee · **on:** Jul 28, 2018

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.