Nwhich of these situations is convection most likely the main form of heat transfer? warm air from a heater on the first floor of a house moves to the upper floors. the sides of a metal pan become hot when the pan is placed on a stove burner. a person gets a sunburn from lying on the beach too long. an ice cube melts when a person holds it in his hand.

the first one. movement through fluids by brownian motion and advection

the results is a decrease in air temperature with an increase of altitude.

explanation:

when a device is used in a circuit in which the voltage is 81 v, the current flowing through the device is 3 a. what is the resistance of the device?

a. 27 ω

b. 40.5 a

c. 243 ω

d. 243 a

the correct answer is a. 27