Answer:
6.17 m
Explanation:
We are given that
Initial speed of rubber ball, u=12 m/s
Total height, h=7 m
Initial speed of second ball, u'=0
We have to find the height at which the two balls collide.
Let first rubber ball and second ball strikes after t time.
For first ball
Distance traveled by first ball in time t
Substitute the value
...(1)
Distance traveled by second ball in time t
.....(2)
Using equation (2) in equation (1) we get
sec
Now, using the value of t
S=6.17 m
Hence, at height 6.17 m the two balls collide .
Answer:
Strong base
Explanation:
A strong base usually has the pH of between 12 to 14
The momentum<span> of a particle is defined as the product of its mass times its velocity. It is a vector quantity. Therefore, the momentum of the baseball would be as follows:
Momentum = mass x velocity
Momentum = 0.45 kg (25 m/s)
Momentum = 11.25 kg m/s</span>
Answer : False.
Explanation : Acid rain is the indirect result of burning fossil fuels. As the incomplete combustion of fossil fuels releases sulfur dioxide and nitrous dioxide in the air. When it rains it gets mixed with water and forms nitric acid and sulfuric acid which causes acid rain. Acid rain is harmful.
It would be D I believe! Depending on the angle of the mirror and distance positioned!
