Explanation

The variation of Electric field (E) with distance (r) is observed as 1/r² for a spherical shell.

This is consistent with Gauss's Law for a spherical shell.

Explanation

• Global Positioning System (GPS) is a scientific method that uses a network of satellites to provide location data and track the movement of vehicles, ships, and aircraft.
• GPS technology allows for accurate navigation, tracking, and monitoring of movements.

Explanation

• A Spectroscope is used to identify the chemical elements present in a star and determine its composition.
• By analyzing the light spectrum, astronomers can also determine the star's temperature, velocity, and distance from Earth.

Explanation

Explanation

• Resistance (C) is the opposition to the flow of electric current.
• It is measured in ohms (Ω).

Explanation

• Pascal's Principle is the fundamental principle behind the operation of hydraulic systems.
• They are used in a wide range of applications, including construction equipment, brakes, lifts, and presses.
• It allows for the multiplication of force and motion, making it a crucial concept in engineering and technology.

Explanation

To determine the height of the fluid above the orifice, we use Torricelli's law, which states:

v= √2gh

where:

v is the speed of efflux (9.8 m/s)

𝑔 is the acceleration due to gravity (9.8 m/s²)

h is the height of the fluid above the orifice

We need to solve for h: 9.8=  2×9.8×h

Square both sides to eliminate the square root:

9.8 ^2 = √2×9.8×h

96.04=19.6h

Divide both sides by 19.6 to isolate ℎ:

ℎ = 96.04/ 19.6

h=4.9m

Explanation

Explanation

• The invention of the Lever is attributed to Archimedes.
• The lever was first described in 260 B.C.E. by Archimedes.

Explanation

• The speed of sound in aluminium is approximately 6420 meters per second.
• It is significantly faster than the speed of sound in air due to aluminium's higher density and elastic properties.

The speed of sound in different materials:

• Air: 332 m/s
• Sea water: 1530 m/s
• Lead: 2160 m/s
• Gold: 3240 m/s
• Brick: 3650 m/s
• Copper: 4760 m/s
• Glass: 5100 m/s
• Aluminium: 6420 m/s