suppose 128 radioactive atoms have a half-life of 15 seconds. approximately how many radioactive atoms will be left after 60 seconds?
a. 32
b. 16
c. 8
d. none

Visualize the problem and identify special cases first examine the problem by drawing a picture and visualizing the motion. apply newton's 2nd law, ∑f⃗ =ma⃗ , to each body in your mind. don't worry about which quantities are given. think about the forces on each body: how are these consistent with the direction of the acceleration for that body? can you think of any special cases that you can solve quickly now and use to test your understanding later? one special case in this problem is if m2=0, in which case block 1 would simply fall freely under the acceleration of gravity: a⃗ 1=−gj^.

What will happen in a hybrid vehicle if current flow becomes too high due to a short?

What are two examples of phase changes that skip a phase during transition?