PART 1: FREE-FALL KINEMATICS 1. A ball is thrown downward with an initial speed of 20 m/s on Earth.
a. What is the acceleration of the ball?
b. Calculate the displacement during the first 4 s.
C. Calculate the time required to reach a speed of 50 m/s.
d. Calculate the time required to fall 300 m (Hint: factor the quadratic or use the quadratic formula).
e. Calculate the speed after falling 100 m.

The “death throes” of stars are amongst the most complex phenomena in all of astronomy, and the “corpses” of stars amongst the most energetic and exotic objects in existence. beginning at the end of the core helium fusion stage in a star’s life, describe in detail the post-main sequence development of both (a) a 1.0 solar mass star, and (b) a 25.0 solar mass star. in what significant ways do they differ? what role does each of these types of stars play in the "star-gas-star" cycle and the evolution of chemical elements in our galaxy?

A110-pound person pulls herself up 4.0 feet. this took her 2.5 seconds. how much power was developed? 0.13 hp 0.32 hp 2.0 hp 3.1 hp

What is a carrier wave and how does it affect what you hear on the radio