1.1 Energy changes in a system, and the ways energy is stored before and after such changes

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Question 5

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This question is about a high-power laser array used for deep-space propulsion.

Write down the equation which links energy ( $E$ ), power ( $P$ ), and time ( $t$ ).

[1]

The laser array has a continuous power output of $MW820\text{ MW}$ . Calculate the total energy emitted by this array during a continuous test firing of 5500 s. Give your answer in Joules ( $J\text{J}$ ) in standard form.

[3]

Due to scheduled cooling cycles and system maintenance, the laser array cannot be operated every day. In a given year ( $days1\text{ year} = 365\text{ days}$ ), the array is operational for 68% of the year. Calculate the number of days during that year that the array is operational.

[2]

This question is about a high-power laser array used for deep-space propulsion.

Write down the equation which links energy ( $E$ ), power ( $P$ ), and time ( $t$ ).

[1]

[3]

1.1 Energy changes in a system, and the ways energy is stored before and after such changes

Question 5

Markscheme

1.1 Energy changes in a system, and the ways energy is stored before and after such changes

Question 5

Markscheme

1.1 Energy changes in a system, and the ways energy is stored before and after such changes

Question 5

1.1 Energy changes in a system, and the ways energy is stored before and after such changes Questions

1.1 Energy changes in a system, and the ways energy is stored before and after such changes

Question 5

1.1 Energy changes in a system, and the ways energy is stored before and after such changes Questions