Answer:
1) D
Explanation:
You have to use a consistent air speed to play the trumpet correctly
12km = 12000m
12000m / 4 m/s = 3000s
just under one hour
Answer:
The time taken by the rock to reach the ground is 0.569 seconds.
Explanation:
Given that,
A student throws a rock horizontally off a 5.0 m tall building, s = 5 m
The initial speed of the rock, u = 6 m/s
We need to find the time taken by the rock to reach the ground. Using second equation of motion to find it. We get :

So, the time taken by the rock to reach the ground is 0.569 seconds. Hence, this is the required solution.
Answer:
)Give the definition of poverty line as defined by the World Bank.