The angular speed is equal to 40rotations per min
Answer:
v (speed) = S / t = 4 * 400 m / (6 * 60 sec) = 4.4 m/s
The average velocity is zero because there is no net vector displacement.
Answer:
Hubble's discovery in the 1920s of a relationship between a galaxy's distance from Earth and its speed; and • the discovery in the 1960s of cosmic microwave background radiation.
Explanation:
It depends on what is the reference frame where the velocity of the leaf (6 m/s) is measured.
If it is measured with respect to the creek, then the answer is simply "6 m/s south".
If it is measured with respect to the observer moving toward the leaf, then the velocity of the leaf relative to the ground is actually the sum between the velocity of the leaf relative to the observer (6 m/s south, so 6 m/s) and the velocity of the observer relative to the ground (2 m/s north, so -2 m/s):
and the direction is south.
<span>The tides are produce by the difference in the moon’s gravitational force across
the earth, creating a bulge on the surface of the ocean and a bulge on the
opposite side of the earth. With this, an </span>oval is seen around
Earth that points toward and away from the moon to show the tidal bulges. This
image shows that the ocean
bulges on both the side of the earth facing the moon and the side opposite the
moon.