Answer:
23.52 m/s
Explanation:
The following data were obtained from the question:
Time taken (t) to reach the maximum height = 2.4 s
Acceleration due to gravity (g) = 9.8 m/s²
Initial velocity (u) =..?
At the maximum height, the final velocity (v) is zero. Thus, we can obtain how fast the rock (i.e initial velocity)
was thrown as follow:
v = u – gt (since the rock is going against gravity)
0 = u – (9.8 × 2.4)
0 = u – 23.52
Collect like terms
0 + 23.52 = u
u = 23.52 m/s
Therefore, the rock was thrown at a velocity of 23.52 m/s.
It's most likely the combination of a bucket and the wheel.
Answer:
Air and ice
Explanation:
convection, process by which heat is transferred by movement of a heated fluid such as air or water.
Everyday Examples of Convection:
radiator - A radiator puts warm air out at the top and draws in cooler air at the bottom.
steaming cup of hot tea - The steam you see when drinking a cup of hot tea indicates that heat is being transferred into the air.
ice melting - Ice melts because heat moves to the ice from the air.