Section 1 - Question 3 Electromagnetic energy can be used in the medical field to treat various diseases. In order for electromagnetic energy to be used for this purpose, it must be able to be targeted to very specific cells within
the body
Which of the following are characteristics of this type of electromagnetic energy
A
low frequency, short wavelength
B
low frequency, long wavelength
С
high frequency, short wavelength
CD
high frequency, long wavelength

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^.