Chapter 33 problem 69
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A 69 kg human sprinter can accelerate from rest to 12 m/s in 3.3 s. During the same interval, a 33 kg greyhound can accelerate from rest to 17 m/s. Compute (a) the change in kinetic energy and (b) the average power output for each.
How many protons, neutrons, and electrons are in 119 Sn 2+ tin ?
a. 50 p, 69 n, 48 e
b. 50 p, 69 n, 50 e
c. 119 p, 50 n, 69 e
d. 69 p, 50 n, 69 e
e. 50 p, 119 n, 52 e
Ive viewed the souloution for problem 63 at chapter 33 wich ishttp://www.cramster.com/solution/solution/516194I get it until they take 75,54 + alpha = 90why does it equal 90?and why do you use snells law after this?