Answer:
B. Stages are continuous and gradual.
Explanation:
Answer:
Nebulae contribute more to stellar formation than other regions because:
Explanation:
A.They have an unlimited supply of hydrogen.
B. They are believed to be rich in hydrogen and helium.
C. They have a three strong gravitational pull.
This are the reasons that Nebulae contribute more to stellar formation than other regions.
By applying Newton's second law of motion;
ma = mg - T
Where,
m = mass; a = downward accelerations (+ve value) or upward acceleration (-ve value); g = gravitational acceleration; T = tension.
For the current case, the velocity is constant therefore,
a = 0
Then,
0 = mg - T
T = mg = 115*9.81 = 1128.15 N
Tension in the cable is 1128.15 N.
Explanation:
Given parameters:
Force applied = 150N
Time = 2s
Unknown:
Momentum change = ?
Solution:
The momentum change of a body is the difference between its initial and final momentum.
Momentum is the same as the impulse exerted on a body which is the product of force and time
Momentum = mass x velocity = force x time
The body initially at rest has a momentum of 0, as the momentum changes;
Momentum change = Final momentum - initial momentum
= f x t - (0)
= (150 x 2) - 0
Momentum change = 300kgm/s
Since the body is a frictionless surface, the net force is the same as the applied force.
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