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Question 7

Complete the sentences to explain why a main sequence star remains stable:

"A main sequence star is stable because the inward gravitational force, caused by ________, is balanced by the outward force of radiation pressure, which is produced by the energy released during nuclear ________."

[2]

Write down the equation that links distance travelled ( $s$ ), speed ( $v$ ), and time ( $t$ ).

[1]

The mean distance between the Sun and Neptune is $4.5 \times 10^{12}\text{ m}$ . Light travels at a speed of $3.0 \times 10^8\text{ m/s}$ . Calculate the time taken for sunlight to reach Neptune.

[2]

Markscheme

5 Forces Questions

GCSE
Physics
5 Forces

5 Forces

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Question 7

Complete the sentences to explain why a main sequence star remains stable:

[2]

Write down the equation that links distance travelled ( $s$ ), speed ( $v$ ), and time ( $t$ ).

[1]

The mean distance between the Sun and Neptune is $4.5 \times 10^{12}\text{ m}$ . Light travels at a speed of $3.0 \times 10^8\text{ m/s}$ . Calculate the time taken for sunlight to reach Neptune.

[2]

Markscheme

5 Forces Questions

GCSE
Physics
5 Forces