1. What is Power?

Power is the rate at which work is done or energy is transferred. In the International System of Units (SI), the unit of power is the watt (W), which is equal to one joule per second.

2. How Does the Calculator Work?

The calculator uses the power formula:

Where:

• \( W \) — Power in watts (W)
• \( E \) — Energy in joules (J)
• \( t \) — Time in seconds (s)

Explanation: This formula calculates how much energy is transferred or converted per unit time.

3. Importance of Power Calculation

Details: Calculating power is essential in physics, engineering, and everyday applications to understand energy efficiency, device performance, and electrical systems.

4. Using the Calculator

Tips: Enter energy in joules and time in seconds. Both values must be positive numbers. The calculator will compute the power in watts.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between power and energy?
A: Energy is the capacity to do work, while power is how fast that energy is used or transferred.

Q2: How many watts are in a horsepower?
A: 1 horsepower ≈ 745.7 watts.

Q3: Can I use this for electrical power calculations?
A: Yes, when you know the energy in joules and time in seconds, this gives you electrical power in watts.

Q4: What's a typical power consumption for household appliances?
A: LED bulb: 5-15W, Laptop: 50W, Refrigerator: 100-400W, Microwave: 600-1200W.

Q5: How can I convert watt-hours to joules?
A: 1 watt-hour = 3600 joules (since 1W = 1J/s and 1 hour = 3600s).