An airplane has a speed of 120 m/s and an angle of flight of 30° above the horizontal. what is the upward component of the airplane's velocity?
oa 0m/s
60 m/s
c
104 m/s
o
d
120 m/s

Does work output exceed work input when a machine is used? a) yes, it does, as machines create energy. b) it depends on the type of machine used. c) no, it doesn’t, as machines are inefficient. d) no, it doesn’t, as machines cannot create energy.

Critical mass is the of material required to produce a chain reaction. a.) minimum amount b.) atomic mass c.) precise amount d.) maximum amount

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