Question 27 (3 points)
if p equals an amount of energy, which equation correctly expresses n, or energy
efficiency?
a. n=p out + p in
b. n- pout - pin
c. n = p out / p in

C. n = P out / P in

Explanation:

Efficiency, in terms of energy, is generally defined as the amount of useful energy in output from a system divided by the amount of energy in input needed to make the system working.

Mathematically:

Or, since in our problem the energy is labelled with P,

No machine can have an efficiency of 1.0 (100 %), because not all the energy in input can be converted into useful output energy: part of it, in fact, is wasted because of internal frictions, and converted into thermal energy (heat).

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

answer:   you might love summer weather, but you don’t want it to feel like the sun is inside your car. but a hot car that just won’t seem to cool down might be a bigger of a problem than you think. your car relies on being at the right temperature.

explanation: