In your opinion, which of the following muds yield a higher penetration rate (rop)? and why?
salt-water mud
salt-saturated mud
fresh water mud
oil base mud

here's the link to your question!

explanation:

the transfer of heat by electromagnetic radiation is called thermal radiation . it is usually carried out by electromagnetic waves in an energy range just below the visible spectrum, which is the infrared range.

so the answer would be radiation.

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