When the balloon is kept in the sun, due to Sun's heat, the kinetic energy of gaseous particles inside the balloons also gets increased and the balloon expands. This will increase the pressure on the walls of the balloon. It continues to expand and comes to a stage when the baloon bursts.
Answer:
Angular acceleration, 
Explanation:
It is given that,
Displacement of the rotating wheel, 
Time taken, t = 2.9 s
Initial speed of the wheel, 
Final speed of the wheel, 
Let
is the angular acceleration of the wheel. Using the third equation of kinematics to find it as :



So, the angular acceleration of the wheel is
. Hence, this is the required solution.
Answer:

Explanation:
From the question we are told that:
Mass 1 
Speed 1 
Mass 2 
Generally the equation for momentum is mathematically given by

Where

Therefore





Mike was running at a higher speed than Mitchell