Body A has the temperature `100^(@)F` and body B has temperature 100 K. If they are brought in contact, then

Options

A. heat flows from A to B
B. heat flows from B to A
C. no heat flows
D. depends on their thermal energies

Explanation

To solve the problem of determining the heat transfer between body A and body B, we will follow these steps:

### Step 1: Convert the temperature of body A from Fahrenheit to Kelvin.
To compare the temperatures of body A and body B, we need to convert the temperature of body A from Fahrenheit to Kelvin. The conversion formula between Fahrenheit (°F) and Kelvin (K) is:

\[ K = \frac{(F - 32) \times 5}{9} + 273.15 \]

Substituting the temperature of body A (100°F):

\[ K_A = \frac{(100 - 32) \times 5}{9} + 273.15 \]

Calculating this:

\[ K_A = \frac{68 \times 5}{9} + 273.15 = \frac{340}{9} + 273.15 \approx 37.78 + 273.15 \approx 310.93 \, K \]

### Step 2: Identify the temperature of body B.
Body B has a temperature of 100 K, which is already in Kelvin.

### Step 3: Compare the temperatures of body A and body B.
Now we have:
- Temperature of body A (converted): \( K_A \approx 310.93 \, K \)
- Temperature of body B: \( K_B = 100 \, K \)

Since \( K_A > K_B \), it is clear that body A is at a higher temperature than body B.

### Step 4: Determine the direction of heat flow.
According to the second law of thermodynamics, heat flows from a body at a higher temperature to a body at a lower temperature. Therefore, heat will flow from body A to body B.

### Conclusion:
When body A (100°F) and body B (100 K) are brought into contact, heat will flow from body A to body B.

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