Answer:
None of the above
Explanation:
When energy is converted from one form to another in a chemical or physical change, none will change. This is due to the law of conservation of energy. It states that the total energy of the system remains constant. It only changes energy from one form of energy to another. So, the correct option is (d) "none of the above".
Answer: There is no specific amount of time.
Explanation:<em>If</em> it takes 7 miles to get somewhere you could be there, or if it is night, you might hit a deer so, it might take even longer.
Answer:
stronger
Explanation:
A magnet can pull up a metal object because it is stronger than the gravitational force of the entire planet.
Answer:
v₀ = 49.5 miles / h
Explanation:
We can solve this exercise with kinematics in one dimension
v² = v₀² - 2 a d
let's apply this equation to the initial data, the fine velocity zero
0 = v₀² - 2 a d
a = v₀² / 2d
in the second case the distance is half (d´ = ½ d), the acceleration of the vehicle is the same, we look for the initial speed
0 = v₀´² - 2 a d´
v₀´² = 2 a d = 2 (v₀² / 2d) d´
v₀´ = v₀ √ 1/2
let's calculate
v₀´ = 70 ra 0.5
v₀ = 49.5 miles / h
Answer:
Gravitational energy
Explanation:
when over head , when it hits the floor thermal energy