What is the definition of period? what is the symbol for period, and what are its units? b. what is the definition of frequency? what is the symbol for frequency, and what are its units?
c. what is the relationship between period and frequency?​

1400 kg car has a speed of 27 m/s. if it takes 7 s to stop the car, what is the impulse and the average force acting on the car?

The material that keeps its new shape after it is stretched is called?

Estimate the schwarzschild radius (in kilometers) for a mini-black hole formed when a superadvanced civilization decides to punish you (unfairly) by squeezing you until you become so small that you disappear inside your own event horizon. (assume that the your weight is 50 kg)