Explanation

The location below the earth's surface where the earthquake starts is called the hypocenter, and the location directly above it on the surface of the earth is called the epicenter

. Sometimes an earthquake has foreshocks.

Explanation

The James Webb Space Telescope (JWST) primarily uses infrared rays to capture images of distant objects in the univers

Explanation

Explanation

The quantity of matter in a body is called its mass.

Explanation

In gases, heat transfers mainly by convection.

Convection is the process of heat transfer by the actual movement of medium particles.

To some extent, gases also transfer heat by conduction when they are in static conditions.

Explanation

In circular motion, the centripetal force  𝐹 required to keep an object moving in a circular path is given by the formula:

𝐹= 𝑚 𝑣^2/ 𝑟

Where:

m is the mass of the object,

v is the velocity of the object,

r is the radius of the circular path.

If the velocity v is doubled, the centripetal force becomes:

F ′ =  m(2v) ^2/r = 4mv ^2/r =4F

This means that if the velocity is doubled, the force will be four times the original, not twice or half the original.

Therefore, neither of the options provided is correct.

Explanation

Potential divider is a circuit that gives us continuously varying potential.

Examples of the potential dividers are Rheostat and Potentiometer

Explanation

In the metric system, the SI unit of length is a meter which is

defined as: “The length of the path traveled by light in a vacuum within 1⁄299792458 seconds.”

Common symbols: l

ND18-9-2023

Explanation

• The hottest stars appear blue in color.
• Blue stars are very hot, with surface temperatures reaching tens of thousands of degrees Celsius.
• It emitting predominantly blue and ultraviolet light.

Explanation

The sun rises in the East and sets in the West.

which means that the Earth is rotating from West to East. 

Earth revolves in orbit around the Sun in 365 days, 6 hours, 9 minutes.

with reference to the stars, at a speed ranging from 29.29 to 30.29 km/s.

The 6 hours, 9 minutes add up to about an extra day every fourth year,

which is designated a leap year, with the extra day added as February 29th.