Insulation or insulating. :) Hope that helps!
Answer
given,
speed of the basketball player, v_x = 4.75 m/s
height of the jump = ?
a) initial vertical velocity = 0 m/s
final vertical velocity = ?
height, h = 0.75 m
using equation of motion
v² = u² + 2 g h
v² = 0² + 2 x 9.8 x 0.75
v² = 14.7
v = 3.83 m/s
b) let horizontal distance= x m
maximum height at time , t s
time taken to reach maximum height

t = 0.39 s
horizontal distance
= v_x × t
= 4.75 × 0.39
= 1.85 m
horizontal distance is equal to 1.85 m
Answer:
Explanation: work equals force times distance so 400x4=1600 joules
Answer:
For outer points of shell

Now for inner point of shell

Explanation:
As we know that out side the shell electric potential is given as

inside the shell the electric potential is given as

now we know the relation between electric potential and electric field as

so we can say for outer points of the shell



Now for inner point again we can use the same



Answer:
Only there will be a change in density of sun.
Explanation:
As your question says only the radius of sun is decreased and there is no change in the mass. So it means that the center of gravity will be the same and as a result the gravitational force remains the same. Only the density of sun changes as it shrinks.