Chapter name please then I can answer
<span>In 1964, while experimenting with the Holmdel Horn Antenna, which was used as a radio telescope, Penzias and Wilson accidentally discovered the microwave background radiation that exists universally. The Holmdel Horn Antenna was used to support the "Big Bang Theory" as opposed to the "Steady State Theory".</span>
<h2>A)</h2>
The forces acting on you are:
- The gravitational pull of the Earth (an others Celestial objects)
- The Normal Force that balance the gravitational pull and points upward.
That is. There is not need for any other force, cause the car its going at constant speed, so the acceleration its zero, as the net force its mass multiplied by acceleration, the net force is zero.
<h3>B)</h3>
The forces acting on you are:
- The gravitational pull of the Earth (an others Celestial objects)
- The Normal Force that balance the gravitational pull and points upward.
That is. Again. The car its slowing down. But, it cant apply a force in you against the direction of movement to slow you down.
<h3>C)</h3>
As you can't be slowed down, you will go forward at the same speed you had when the car went steady, and will crash against whatever its in front of you.
D)
The friction force, will pull you against the direction of movement, and slow you down will the car slows down.
Answer:
It can be calculated from Snell's law by setting the refraction angle i.e. equal to 90°.
Hope it helps!
Answer: Option (D) is the correct answer.
Explanation:
A chemical reaction is defined as the reaction which causes change in chemical composition of a substance.
According to law of conservation of mass, mass can neither be created nor it can be destroyed. It can only be changed from one form to another.
For example, 
Here, total mass of reactants = (1.008 + 35.453) g/mol = 36.461 g/mol
Whereas total mass of products = 36.461 g/mol
This shows that mass remains the same before or after the reaction.
Similarly, the number of atoms of the type involved will remains the same as no change in their nucleus is occurring.
Thus, we can conclude that the following must be the same before and after a chemical reaction.
- The sum of the masses of all substances involved.
- The number of atoms of the type involved.
