A 120 V potential difference is applied to a space heater whose resistance is 11.5 Ω when hot. At what rate is electrical energy being transferred to thermal energy?

1250 W

Explanation:

The rate of energy transfer is the power of the heater. The power of the heater is given by

From Ohm's law, .

Then

Hence, power can be written as

Using values from the question,

i believe it is b. what was the cause of the big bang

hope this !

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