Answer:
c.they have opposite charges.
Explanation:
because the protons have a positive charge and the neutrons have no charge.
Answer:
D.
a heat force generated by the flames
Explanation:
Im not sure if that is right. the answer also maybe C.
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 !)
Anaphase, the shortest stage of mitosis