Physics

How many colors are there in the spectrum when white light is separated?

• 6

• 7

• 8

• 9

A Newton is equal to which of the following?

• kilogram-meter per second

• meter per second squared

• kilogram-meter per second squared

• kilogram per meter-second

The work done by a friction force is:

• always positive

• always negative

• always zero

• either positive or negative depending upon the situation

It is more difficult to walk on a sandy road than on a concrete road because ____________.

• Sand is soft and concreter is hard

• The friction between sand and feet is more than that between concrete and feet

• The friction between sand and feet is less than that between concrete and feet

• The sand is grainy but concrete is smooth

Which among the following is an accurate depiction for the deceleration when a car is travelling in a north direction and produces a deceleration of 80 m/s² to stop?

• Westwards, 80 m/s²

• Southwards, 80 m/s²

• Eastwards, 80 m/s²

• Northwards, 80 m/s²

Tags

NGSS.HS-PS2-1

Which among the following activities is not an example of the third law of motion?

• Running

• Cycling

• Skiing

• Walking on a boat

Tags

NGSS.MS-PS2-1

Which among the following is a vector quantity?

• Mass

• Displacement

• Temperature

• Density

A body is said to have the power of 1 Watt if it does work at the rate of ______.

• 1 joule

• 1 joule in 1 second

• 1 second

• 1 radian / second

Why can lights travel in a vacuum but not sound?

• Light waves are dual in nature

• Due to the electromagnetic nature of light waves.

• Due to the electromagnetic nature of sound waves.

• Speed of sound is very slow than light

Tags

NGSS.HS-PS4-3

A candela is an SI unit for what?

• Radioactivity

• Luminous intensity

• Amount of substance

• Inductance