Suppose a woman does 463 j of work and dissipates 8,854 j of heat in the process. (a) what is the decrease in her internal energy, assuming no change in temperature or consumption of food? (that is, there is no other energy transfer.) kcal (b) what is her efficiency? %

Part a)

decrease in internal energy is 2.23 k Cal

Part b)

Efficiency will be 4.9 %

Explanation:

Part A)

As per first law of thermodynamics we know that

here we have

Q = -8854 J

W = 463 J

now we have

so we have

So decrease in internal energy is 2.23 k Cal

Part B)

Efficiency of the woman is given as

here we have

So efficiency will be 4.9 %

coil wire, increase current, put iron inside the coil

emily ruth's annual premium is $1058.50

step-by-step explanation:

emily ruth is a female of 27 years age purchasing 20 year endowment insurance with face value $25000.

from the given table,

for females, the age of a male 3 years younger should be used.

so, we have to check for 24 year male for 20 year endowment.

it is 42.34 for every $1000 face value.

for a face value of $25000,

it is 25 * 42.34 = $1058.50

∴ emily ruth's annual premium is $1058.50