Answer:
R^3 = GM / ω^2
R^3 = (6.67 * 10^-11) * (5.98 * 10^24) / (0.00007272)^2
R^3 = 7.54 * 10^22
R = 42,251,269
R = 4.225 * 10^7 m
4.225 * 10^7
Explanation:
Answer:
A. Moving the mass from Point C to B, although it involves a greater distance, requires less force to do the same amount of work.
Explanation:
The amount of work will be the same either way. By going from C to B, the mover will exert less force over a greater distance, which is easier than exerting a greater force over a shorter distance.
Answer:
Option A
Measures light from distant objects
Explanation:
A spectroscope is used to measure the use of light from a distant object to work out the object is made of.
It could be the single-most powerful tool astronomers use.
Professor Fred Watson from the Australian Astronomical Observatory says that "It lets you see the chemicals being absorbed or emitted by the light source"
Answer:
hydrometer
Explanation:
A hydrometer is an instrument used to determine specific gravity. It operates based on the Archimedes principle that a solid body displaces its own weight within a liquid in which it floats. Hydrometers can be divided into two general classes: liquids heavier than water and liquids lighter than water.
