Answer:
Approximately
.
Explanation:
Let
denote the gravitational constant. (
.)
Let
and
denote the mass of two objects separated by
.
By Newton's Law of Universal Gravitation, the gravitational attraction between these two objects would measure:
.
In this question:
is the mass of the moon, while
is the mass of the water. The two are
apart from one another.
Important: convert the unit of
to standard units (meters, not kilometers) to reflect the unit of the gravitational constant
.
.
.
To solve this problem it is necessary to apply the concept related to wavelength, specifically when the wavelength is observed from a source that is in motion to the observer.
By definition the wavelength is given defined by,

Where
= Observed wavelength
= Wavelength of the source
c = Speed of light in vacuum
u = Relative velocity of the source to the observer
According to our data we have that the wavelength emitted from the galaxy is 1875nm which is equal to the wavelength from the source, while the wavelength from the observer is 
Therefore replacing in the previous equation we have,




Solving for u,







Therefore the speed of the gas relative to earth is 0.02635 times the speed of light.
True. If the amount displaced is more than the mass, it floats. If the amount is less than the mass, it will sink.
Answer:
Wrong its B Use a different amount of mass in the cart for five different trials, roll the cart down a ramp with the same slope for each trial, and measure how long it takes the cart to roll one meter each time.
Explanation: