Simple Harmonic Motion: If your heart is beating at 76.0 beats per minute, what is the frequency of your heart's oscillations in hertz? A) 1.27 Hz
B) 1450 Hz
C) 3.98 Hz
D) 2.54 Hz
E) 4560 Hz

Explain using examples, what is simple harmonic motion and why it is an important area of study in physics.

The number of passengers who arrive at the platform of a subway station for the 10 am train is a random variable with a mean of 120 and a variance of 16. find the lower bound of the probability that there will be between 100 and 140 passengers (round off to second decimal place).

Estimate of the number of stars in our galaxy