Explanation

A voltmeter is used to measure the potential difference (voltage) across two points in a circuit.

It is connected in parallel with the component whose voltage is being measured.

Explanation

Given:

Sum of numbers = -8

Product of numbers = 15

The algebraic expression representing this is:

x^2 - (sum)x + (product) = 0

x^2 - (-8)x + 15 = 0

x^2 + 8x + 15 = 0

The correct answer is: x^2 + 8x + 15

Explanation

Explanation

The surface area of a sphere is given by the formula: 4πr².

Substituting r = 7 cm, we get 4 × 3.1416 × (7)² = 616 cm².

Explanation

The Indus River Valley Civilization, 3300-1300 BCE.

It is also known as the Harappan Civilization.

It extended from modern-day northeast Afghanistan to Pakistan and northwest India.

Explanation

A central angle of 90° represents one-quarter of the full circle (360°).

Therefore, the proportion of that part is 25%.

Explanation

Refraction is the bending of light as it passes from one medium to another (e.g., air to water).

This occurs due to a change in the speed of light in different media.

Explanation

In terrestrial ecosystems, plants are the main producers that convert sunlight into energy via photosynthesis.

They form the base of the food chain and support all other life forms.

Explanation

The medulla oblongata is part of the hindbrain and plays a key role in transmitting messages between the brain and the spinal cord.

It also controls essential functions such as breathing, heart rate, and blood pressure.

Explanation

Conduction is the process through which heat is transferred from the hotter to the colder area of a conductor, like a metal rod.

It occurs when particles in the hot region collide with particles in the cooler region, transferring energy.