solve:

The exposure rate from a point source of radiation can be calculated using the formula:

Exposure Rate= Activity*Exposure Rate Constant​*(Distance)^(-2)

For Cobalt-60 (Co-60),

The exposure Rate Constant (Γ) is 1.32 R m² hr⁻¹ Ci⁻¹1.

Given:

Activity (A) = 100 Ci

Distance (d) = 2 m

Substituting these values into the formula, we get:

Exposure Rate=100Ci×1.32R (m² hr⁻¹ Ci⁻¹)​*(2m)^(-2)=33R/hr

This is approximately 32 R/hr, which is the exposure rate you mentioned. Please note that this is a simplified calculation and actual exposure rates can vary based on other factors such as shielding, air absorption, and energy of the emitted radiation.

The exposure rate from a 100 Ci point source of Co-60 at 2 meters is given as 32 R/hr. To convert this to mSv/h, we can use the conversion factor that 1 Roentgen per Hour (R/h) is equivalent to 10 Millisievert per Hour (mSv/h)1.

So, if we have 32 R/hr, we can convert it to mSv/h using the following calculation:

32 R/hr * 10 mSv/h/R = 320 mSv/h

Therefore, the dose rate D in mSv/h is 320 mSv/h.