Author Question: An object from which light cannot escape is called a (a) a black hole (b) a neutron star (c) a ... (Read 53 times)

mp14 · **on:** Jul 28, 2018

An object from which light cannot escape is called a
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(a) a black hole
(b) a neutron star
(c) a white dwarf
(d) a type I supernova

Question 2

A 2.0-kg mass swings at the end of a light string (length = 3.0 m). Its speed at the lowest point on its circular path is 6.0 m/s. What is its kinetic energy at an instant when the string makes an angle of 50 with the vertical?
a. 21 J
b. 15 J
c. 28 J
d. 36 J
e. 23 J