A 400-W computer (including the monitor) is turned on for 8.0 hours per day. If electricity costs 10¢ per kWh, how much does it cost to run the computer annually for a typical 365-day year?

11680 cents

Explanation:

The computer turned on 8 hours per day.

So, In 365 day the computer turn on 2920 hours (365*8 hours).

Power P = 400 W

the consumption of energy,

E = Pt

E = 400*2920

E = 1168 kWh

Now, electricity cost is 10 cents per kWh.

So, for 1168 kWh the electricity cost is 1168*10 = 11680 cents.

Hence, the electricity cost in 365 days is 11680 cents.

weight of the box is given as

here this is placed on the inclined of angle 42 degree

now this weight will have two components one is along the incline other is perpendicular to it

so here we need to apply a force parallel to incline opposite to its component of weight

so here the component of weight is given as

here we have

so it requires 75 n force to move it upwards

a 2,000 calorie based diet.