Answer:
sun,fire
Explanation:
The main source of heat is sun. It is because there is so much pressure in the core of sun that nuclear fusion takes place: hydrogen is changed to helium. Nuclear fusion creates heat and light.
Answer:
150 J
Explanation:
Work: This can be defined as the product of force and distance. The S.I unit of work is Joules (J)
The work done in lifting the crate = Force × distance.
W = F×d .............................. Equation 1.
Where F = force, d = distance, W = work done in lifting the crate,
Given: F = 100 N, d = 1.5 m.
Substituting these values into equation 1
W = 100(1.5)
W = 150 J.
Thus the work done in lifting the crates to that height is 150 J
Answer:
1.65 kg.m/s
Explanation:
mass of ball (m) = 0.13 kg
initial speed (u) = 18 m/s
acceleration due to gravity (g) = 9.81 m/s^{2}
angle of projection (p) = 90°
to find the momentum half way to its maximum height we first have to know the maximum height, and the velocity at the maximum height.
maximum height (h) =
maximum height (h) = = 16.53 m
velocity at half the maximum height (v) can be gotten from the equation of motion
( the negative sign is because the ball is moving upwards)
v =
v= 12.72 m/s
momentum of the ball half way to its maximum height = mass x velocity = 0.13 x 12.72 = 1.65 kg.m/s
The answer to this question is true
Answer:
Measurement is the act or the process of finding the size, quantity or degree of something.
Explanation:
We can measure the length, weight, and capacity (volume) of any given object.