Explanation

Potential energy and kinetic energy are types of mechanical energy. 

Mechanical energy encompasses both potential energy (stored energy due to position) and kinetic energy (energy of motion). 

Explanation

The kinetic energy (KE) of an electron in the nth orbit is given by:

KE = 1/2mv²n

Where m is the mass of the electron and vn is its velocity in the nth orbit.

Explanation

The energy transferred is known as kinetic energy, and it depends on the mass and speed achieved.

Kinetic energy can be transferred between objects and transformed into other kinds of energy.

Explanation

To find which body has the largest kinetic energy, we use the formula for kinetic energy:

$$text{K.E.} = frac{1}{2}mv^2$$

Mass = 2M, Speed = 3V

$$$$K.E.d=12⋅2M⋅(3V)2

$$$$
=12⋅2M⋅9V2

$$text{K.E.}_d = frac{1}{2} cdot 2M cdot (3V)^2 = frac{1}{2} cdot 2M cdot 9V^2 = 9MV^2$$K.E.d​=1​/2⋅2M⋅(3V)^2=1/2​⋅2M⋅9V^2=9MV^2

Explanation

Spring potential energy is given by U = 1/2kx².

If stretching to distance S gives 10 J, then to stretch to 2S, the energy becomes 1/2k(2S)² = 4×10 = 40 J.

So, additional work =  40−10 = 30 J.

Explanation

Potential energy is stored energy due to an object's position or state.

Examples:

• A stretching spring (elastic potential energy)
• A stone lying at a height (gravitational potential energy)
• A book placed on a table (gravitational potential energy)
• A pressed spring (elastic potential energy)

Explanation

Potential energy is the energy an object has due to its position or state.

For example, being elevated in a gravitational field.

It can potentially do work if it moves.

Explanation

The lens in the human eye is a convex lens, meaning it is thicker in the middle than at the edges.

This shape allows it to focus light rays convergently, creating a real image on the retina.

A convex lens is also known as a converging lens, as it converges light rays to a focal point.

Explanation

The crest is the part of a transverse wave where the particles of the medium are at the highest point, above the undisturbed position.

It is the peak or maximum displacement point in the wave.

Explanation

"People" is plural, so the verb must be plural too.

"Were" is the past tense plural form of "to be," matching the sentence context.