Explanation

Explanation

Explanation

Explanation

Telstar, launched in 1962 by the US, was the first active communications satellite.

It successfully relayed television, telephone, and data signals across the Atlantic.

Explanation

Nuclear fusion reactions in a star's core produce outward thermal pressure, which balances the inward pull of gravity.

This balance between gravitational force and nuclear pressure keeps the star stable and prevents collapse during its main life phase.

Explanation

CaCO₃ → CaO + CO₂

This reaction absorbs heat to break calcium carbonate into calcium oxide and carbon dioxide.

It is a classic endothermic decomposition reaction, requiring continuous heating to proceed.

Explanation

To find the greatest possible length of each piece, we need to find the greatest common divisor (GCD) of 18, 42, and 24.

Factors of 18: 1, 2, 3, 6, 9, 18

Factors of 42: 1, 2, 3, 6, 7, 14, 21, 42

Factors of 24: 1, 2, 3, 4, 6, 8, 12, 24

The greatest common factor is 6.

Explanation

Existentialism in education emphasizes individual choice, freedom, and personal responsibility in learning.

It focuses on student-centered learning, allowing learners to explore what is personally meaningful to shape their identity.

Explanation

The word "kindly" suggests a polite request, so we use "requested" in indirect speech.

The sentence changes from direct to indirect without quotes and in the correct verb form.

Explanation

Supplementary angles are two angles whose sum is exactly 180 degrees.

They often form a straight line when placed adjacent to each other.