A light bulb uses 60 W of power. How much energy does it consume in 5 hours?

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Question: A light bulb uses 60 W of power. How much energy does it consume in 5 hours?

Options:

Correct Answer: 108000 J

Solution:

Energy consumed can be calculated using E = P * t. Here, E = 60 W * (5 * 3600 s) = 108000 J.

A light bulb uses 60 W of power. How much energy does it consume in 5 hours?

A light bulb uses 60 W of power. How much energy does it consume in 5 hours?

Step 1: Understand that power (P) is the rate at which energy is used. In this case, the light bulb uses 60 watts (W) of power.
Step 2: Know that 1 watt is equal to 1 joule per second (1 W = 1 J/s).
Step 3: Convert the time from hours to seconds. Since there are 3600 seconds in 1 hour, for 5 hours, calculate: 5 hours * 3600 seconds/hour = 18000 seconds.
Step 4: Use the formula for energy consumed, which is E = P * t, where E is energy, P is power, and t is time.
Step 5: Substitute the values into the formula: E = 60 W * 18000 s.
Step 6: Calculate the energy: E = 60 * 18000 = 108000 joules (J).

Power and Energy Relationship – Understanding the relationship between power (in watts) and energy (in joules) through the formula E = P * t, where E is energy, P is power, and t is time.