45) B) Vaporizing water at its boiling point
46) D) There is no change in temperature
47) B) Molecules must be pulled apart
48) D) Steam at 100 C
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Answer:
1. Revolve around a point
2. Formed from dust and gas particles
3. Exoplanets and associated star orbit a common center of mass
4. Composed of gases found in Jupiter and Saturn
Answer:
According to the gravitational law of Isaac Newton, "the gravitational force between any two objects is proportional to the product of the objects’ masses and inversely proportional to the square of the separation between their centers".
Therefore gravitational constant is the proportionality constant used in Newton’s Law of Universal Gravitation, and is commonly denoted by G. It is expressed as:
F= Gm1m2/r2
Another scientist Cavendish was able to measure the gravitational force and the value of the proportionality constant. It is expressed as G = 6.673×10-11 N m2 kg-2.
The photography that shows a person using a type of wave technology, allows people to see very small objects clearly. D as it is a microscope
<h3>Why are wave technologies important?</h3>
Wave technologies are important because;
- They create waves that are more perfect than humans can provide by themselves.
- Certain inventions use waves to enhance human senses like hearing, sight and touch.
Thus, the photography that shows a person using a type of wave technology, allows people to see very small objects clearly. D as it is a microscope.
Learn more about microscope here:
brainly.com/question/1444040
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