One joule is approximately equal to

Options

A. 0.28 cal
B. 0.32 cal
C. 0.24 cal
D. 4.2 cal

Explanation

To find out what one joule is approximately equal to, we can follow these steps:

### Step 1: Understand the Definition of Joule
1 Joule (J) is defined as the amount of work done when a force of 1 Newton (N) acts on an object and moves it through a distance of 1 meter (m) in the direction of the force.

### Step 2: Write the Formula for Work Done
The formula for work done (W) is given by:
\[ W = F \times d \]
where:
- \( W \) is work done in joules,
- \( F \) is the force in newtons,
- \( d \) is the distance in meters.

For 1 joule:
\[ 1 \, \text{J} = 1 \, \text{N} \times 1 \, \text{m} \]

### Step 3: Convert Joules to Calories
To convert joules to calories, we use the conversion factor:
\[ 1 \, \text{calorie} = 4.2 \, \text{joules} \]
From this, we can derive that:
\[ 1 \, \text{joule} = \frac{1}{4.2} \, \text{calories} \]

### Step 4: Calculate the Value
Now, we can calculate the value:
\[ 1 \, \text{joule} \approx 0.24 \, \text{calories} \]

### Conclusion
Thus, one joule is approximately equal to 0.24 calories.

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