What’s the efficiency of a car that uses 400,000 J of energy from gasoline to make 48,000 J of kineticenergy?

A ray at which angle would produce the most glare is at 70 degrees. The answer is letter D. the greater the incident of light is, the greater is its index of refraction and thus having greater angle to produce a light ray.

The ray more the incidence ray, the more will be the reflected ray. As angle of incidence is to angle of reflection.

Glare can be defined as the difficulty in seeing the object due to more brightness. The bright light such as the direct sunlight or the reflected sunlight or the headlight at the nighttime.The more the intensity the more will be glare.

Hence, the ray that will produce most glare is 70 degree.

Answer:

3.75m/s²

Explanation:

g= GM/r²

For planet 1

= GM/r²                   (i)

= 15m/s²

for planet 2

radius= 2*r= 2r

g= GM/r

= GM/(2r)²

= GM/4r²

=  GM/r² *1/4

from (i)

=   *1/4

= 15/4

= 3.75m/s²

The equation E = mc² relates energy and mass and the correct option is option D.

The equation was formulated by Albert Einstein as part of his theory of special relativity. In this equation, "E" represents energy, "m" represents mass, and "c" represents the speed of light in a vacuum, which is approximately 3 x 10⁸ meters per second. The equation states that energy is equal to the mass of an object multiplied by the square of the speed of light.

This equation demonstrates the equivalence between mass and energy, suggesting that mass can be converted into energy and vice versa. It is a foundational equation in physics and has significant implications in understanding the relationship between matter and energy.

Thus, the ideal selection is option D.

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