As an object becomes hotter, the rate of heat transfer from the object to a cooler body with which it is in contact would

a. decrease
b. increase
c. not change
d. no determination can be made from the information given

b. increase

Explanation:

According to fourier's law of conduction the rate of transfer of heat from a hot body to cold body is directly proportional to the temperature difference of the bodies

L= length of the object

A= area of contact

ΔT= temperature difference

k= thermal conductivity.

therefore we can say that As an object becomes hotter, the rate of heat transfer from the object to a cooler body with which it is in contact would

b. increase

first let us lay out the formula for potential

and kinetic energy:

pe = mgh

ke = (mv^2)/2

where: m=mass, v=velocity, g=gravitational

acceleration, h=height

calculating for mass using the known values of

pe:

340j = m (9.81 m/s^2) (50ft) (1m/3.28ft)

m = 2.27 kg

the law of conservation of energy states that

energy is neither created nor destroyed. therefore, the change in kinetic

energy from 50 ft to 35 ft would be equal to the change in potential energy

from 50 ft to 35 ft. however it would be opposite in signs since one is losing

while other is gaining.

ke(35ft) – ke(50ft) = - [ pe(35ft) – pe(50ft]

ke(50ft) = 0 since the brick is initially at rest

ke(35ft) = 340j - 2.27kg (9.81 m/s^2) (35ft)

(1m/3.28 ft)

ke(35ft)

= 102.38 j