Answer:
B. Planets orbit a star, while moons orbit a planet
Explanation:
Every planet must orbit a star, like how the Earth orbits the Sun (the star of our solar system). Our moon orbits Earth. On other planets, there can be dozens of moons orbiting it.
Answer:
5 Pascals
Explanation:
Pressure is equal to force/area and the area is 60cm to m is 0.6m. Then the area is 0.6m×5m=3m^2. which gives a pressure of 15N/3m^2=5Pa
For this case we have the following equation:
h (t) = -16t ^ 2 + 36t + 36
By the time the rock hits the water we have:
-16t ^ 2 + 36t + 36 = 0
Solving the second degree polynomial we have:
t1 = -3/4
t2 = 3
We discard the negative root because we want to find the time.
Answer:
It will take for the rock to hit the water about:
t = 3 seconds
Answer:
A crowbar is a level.
Explanation:
A crowbar is a first class lever. One where the fulcrum is between the effort and the load; The effort is applied to the end of a crowbar for example pulling up a nail the fulcrum is where the crow bar bends upwards touching the board, the load is the nail on the opposite end of the bar.
Answer:
<em>3</em><em>.</em><em>2</em><em> </em><em>hours</em>
Explanation:
400÷125=3.2
3.2 or 3 hours and 12 minutes.