Explanation

Volume of a sphere (or similar 3D object):

V= 4/3​πr^3

• So, volume depends on the cube of the radius.

• Percentage error in volume = 3 × (percentage error in radius)

$$\text{Error in volume}=3\times 1\%=3\%$$

Explanation

The least distance of distinct vision for a normal human eye is 25 cm.

It is the minimum distance at which the eye can see an object clearly without strain.

Explanation

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

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

Explanation

Since the two boxes are identical, the weight of the second box is equal to the weight of the first box. 

The normal force from the table will increase to support the combined weight of both boxes, which is 150 N (2 x 75 N).

Explanation

Jupiter has the shortest day in the solar system.

It completing one rotation in approximately 9 hours and 56 minutes.

Jupiter is also the fastest spinning planet in the solar system.

Explanation

The transmission line feeding power on either side of the main transmission line is called Secondary transmission.

Explanation

The practical use of a thermocouple's small electromotive force is mainly in instruments.

It is used for temperature measurement and control in various scientific and industrial applications.

Explanation

• When light travels in a straight line and strikes the surface of another medium, it reflects off the surface and changes direction.
• This is known as reflection.

Explanation

Kinetic energy is the energy of motion, and any object that is moving has kinetic energy.

• A moving car (energy from motion)
• A moving runner (energy from motion)
• A moving bicycle (energy from motion)