Answer:
option D
Explanation:
the correct answer is option D
acceleration of a body under free fall due to the effect of gravity is the called acceleration due to gravity.
Acceleration due to gravity is a constant value.
According to the International System of Measurements the acceleration due to gravity is 9.81 m/s² when an object falls vertically.
acceleration due to gravity is denoted by 'g'.
Answer:
the orbit of Io around Jupiter causes the tidal heating.
Explanation:
Io's elliptical orbit causes the tidal force to vary as it orbits Jupiter.
Because Jupiter is a very massive planet, it has a very large gravitational pull on its moons, so the side of Io facing the planet is experiencing a greater gravitational pull than the opposite side. This causes a distortion in the shape of the Io, and a friction that causes the tidal heating.
This friction generates heat currents, which is what makes Io the place with the most volcanic activity in the solar system.
What a delightful little problem !
-- When he is running on level ground, his kinetic energy is
KE = (1/2) x (mass) x (speed)² .
-- When he climbs up from the ground, his potential energy is
PE = (mass) x (gravity) x (height above the ground).
We're looking for the height that makes these quantities of energy equal,
figuring that when he runs, his speed is 11 m/s.
The first time I looked at this, I thought we would need to know the runner's
mass. But it turns out that we don't.
<u>PE = KE</u>
(mass) x (gravity) x (height) = (1/2) (mass) (11 m/s)²
Divide each side by (mass) :
(gravity) x (Height) = (1/2) (11 m/s)²
Divide each side by gravity:
Height = (1/2) (121 m²/s²) / (9.8 m/s²)
= <em>6.173 meters</em>
(about 20.3 feet !)
Answer:
a
Explanation:
because it has compact molecules