Answer:
An object with negative acceleration could be speeding up, and an object with positive acceleration could be slowing down. ... Consider the fact that acceleration is a vector that points in the same direction as the change in velocity.
Explanation:
Answer:
Explanation:
d = Diameter of typical neutron star = 20 km = 20000 m
D = Distance between Earth and Moon =
Here, so we use small angle approximation
The angular diameter of the neutron star would be from Earth.
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
At high altitudes, the air pressure is lower and it is more difficult for us to breathe because we cannot take in enough oxygen.
Answer:
The views of scientific knowledge can change over time. Changes can result from new science observations, but can also be affected by social, political or religious reasons.To develop a deeper understanding, we need to investigate the reason for that, that how it's happening why it's happening etc.