How does an object's rate of cooling vary with size? a. a larger object cools more slowly than a smaller object. b. a smaller object cools more slowly than a larger object. c. size has no effect on an object's rate of cooling.

A

smaller object cools faster than larger object

Explanation:

rate of cooling and adjusting of temperature to its surroundings is dependent on the objects surface area to volume ratio - which a smaller object would have higher than a large object.

provided they are both of the same shape and material

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

does anyone know or what?