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

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Question 12
Easy

An autonomous deep-sea submersible is being prepared for a research mission.

a.

State the equation that links energy transferred (EEE), power (PPP), and time (ttt).

[1]
b.

The submersible has an emergency auxiliary battery that stores 5.76×106 J5.76 \times 10^6\text{ J}5.76×106 J of energy. During a backup procedure, the vehicle's telemetry system operates at a power level of 240 W240\text{ W}240 W. Calculate the maximum operating time, in seconds, of the telemetry system when powered solely by a fully charged auxiliary battery.

[2]
c.

State the equation that links current (III), potential difference (VVV), and resistance (RRR).

[1]
d.

The submersible's main hydraulic pump motor operates at a potential difference of 48 V48\text{ V}48 V. When active, it draws a current of 15.0 A15.0\text{ A}15.0 A. Calculate the electrical resistance of this pump motor.

[2]

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

  1. GCSE
  2. /Physics
  3. /Energy changes in a system, and the ways energy is stored before and after such changes