Question

A ball is launched from
ground level with an initial velocity of 250
m/s directed 37° above the horizontal. The
ball travels with negligible air resistance
over level ground.
11. How fast is the ball moving when it reaches the highest point in its trajectory?
a. 0.0 m/s b. 125.0 m/s c. 150.0 m/s d. 200.0 m/s e. 250.0 m/s
12. How fast is the ball moving just before striking the ground?
a. 0.0 m/s b. 125.0 m/s c. 150.0 m/s d. 200.0 m/s e. 250.0 m/

Answer 1

Answer:

Water boils at 100°C, becoming a gas(steam). In contrast, LPG boils at -42°C becoming gas vapour. The process of going from liquid to vapour (gas) iscalled vaporisation. LPG stays liquid because it is under LPG pressure in agas cylinder.29-Apr-2021