Answer:
When a ray of light falls on a glass slab normally, the angle between normal and incident ray is zero.
<span>The correct answer is C. Stars are able to form from clouds of dust and gas because of the law of universal gravitation. The law of universal gravitation applies because of the fact that stars themselves are always made of hydrogen, which is a gas at first. However, in order to become dense gravity will always be needed, in order for the hydrogen atoms to be joined together.</span>
Answer:
v = 3.6m / s
, θ = 56º
Explanation:
This is a relative speed exercise, let's use the Pythagorean theorem
v = √ (v₁² + v₂²)
where v₁ is the speed of the sea still water and v₂ the speed of the current
let's calculate
v = √ (2² + 3²)
v = 3.6m / s
to find the direction we use trigonometry
tan θ = v₂ / v₁
θ = tan⁻¹ (v₂ / v₁)
let's calculate
θ = tan⁻¹ (3/2)
θ = 56º
<span>Newtons Third Law of Motion: for every action there is an equal and opposite reaction. I think
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The distance traveled by pendulum, in one back-and-forth swing is 75.75 inches.
The period of pendulum can be calculated by
Where,
- period
- length = 12 inches
- gravitational acceleration = 
Put the values,
Now, the angular displacement of the pendulum can be calculated by,
Where,
- amplitude
- angle = 
- angular displacement = 
= 2.866 m
Put the values and calculate for ,
Therefore, the distance traveled by pendulum, in one back-and-forth swing is 75.75 inches.
To know more about Amplitude of pendulum,
brainly.com/question/14840171
