Course home

1 Energy

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56

Question 10

81%

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]

Markscheme

1 Energy Questions

GCSE
Physics
1 Energy

1 Energy

Question bank

1 Energy

Easy Medium

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56

Question 10

81%

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]

[2]

Markscheme

1 Energy Questions

GCSE
Physics
1 Energy