Answer:
i dont know the answer for this question sorry for the misunderstanding
Explanation:
Answer:
h = 0.46 m
Explanation:
According to the law of conservation of energy:
Potential Energy Lost by Roller Coaster = Kinetic Energy Gained by Roller Coaster

where,
h = height = ?
v = speed at bottom = 3 m/s
g = acceleration due to gravity = 9.81 m/s²
Therefore,

<u>h = 0.46 m</u>
For the given problem, the amount of work done expressed in ergs is 3200 ergs.
Answer: Option A
<u>Explanation:
</u>
The work done on an objects are the force acting on it to move the object to a particular distance. So, work done on the object will be directly proportional to the force acting on it and the displacement.
Here, the force acting on the object is given as 0.010 N and the displacement of the object is 0.032 m. So, the work done on the object is


It is known that 
So, the work done can be expressed in
as,

It is known that
, so the conversion of units from Nm to erg will be done as follows:

Thus, work done in ergs is 3200 ergs.
The correct answer for this question is 160.89 m².
The square footage of a newspaper ad for an apartment is = 1730ft²
We know that one square foot equals 0.093 square meters.
We can determine the area in square meters using the above conversion.
Total square meters = 0.093×1730ft² (or) 1730÷10.7
= 160.89 m²
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The angle of reflection made when the angle of incidence of light falling on a plane mirror is 30 degrees is 30 degrees (made with a surface normal to the mirror surface.) The reflected ray will make an angle of (90- 30=) 60 degrees with the mirror surface.
It is referred to as light reflection when a light ray hits a polished or smooth surface and bounces back. The incident light rays hit the surface and are reflected off of it. The beam that returns is referred to as the reflected ray.
The angle of reflection and the angle of incidence, are the angles formed by these light rays when they reflect back or fall on a surface, respectively.
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