How does the currently accepted model of the nucleus provide evidence of the existence of the strong nuclear force?
a)the protons have like charges and should repel, so to stay near each other in the nucleus, there is a strong force holding them together.
b)the electrons have like charges and should repel each other, which is why they are scattered in the electron cloud.
c)the protons and neutrons have opposite charges
ach other, so to keep them apart, there must be a strong force in the nucleus.
d)the particles in the nucleus are separated
ty
force that keeps them apart.

The base of a 50-meter tower is at the origin; the base of a 50-meter tree is at (0, 50, 0). the ground is flat and the z-axis points upward. the following parametric equations describe the motion of six projectiles each launched at time t = 0 in seconds. (i) r (t) = (50 + t2)k (ii) r (t) = 2t2 j + 2t2k (iii) r (t) = 50 i + 50 j + (50 − t2)k (iv) r (t) = 2t j + (50 − t2)k (v) r (t) = (50 − 2t) i + 2t j + (50 − t)k (vi) r (t) = t i + t j + tk (a) which projectile is launched from the top of the tower and goes downward? at time t = , the projectile hits the ground at point (x, y, z) = . (b) which projectile hits the top of the tree?