In doing a load of clothes, a clothes dryer uses 19 A of current at 240 V for 29 min. A personal computer, in contrast, uses 2.7 A of current at 120 V. With the energy used by the clothes dryer, how long (in hours) could you use this computer to "surf" the internet

The time taken is 6.80 h.

Explanation:

The expression for the electric energy in terms of voltage and current is as follows;

E= V'It

Here, V' is the voltage, I is the current and t is the time.

Calculate the electric energy of the clothes dryers.

E= VIt

Convert time taken from minutes to hours.

t= 29 min

Put I= 19 A, V= 240 V and .

E= 2204 W

Calculate time which is used to surf the internet on the computer by rearranging the expression for the electric energy.

Put E= 2204 W, I= 2.7 A and V= 120 V.

t= 6.80 h

Therefore, the time taken is 6.80 h.

the box does not move because you need to use a force greater than 300 n. you are only using 50 n. it needs to at least be 301 n for the box to move because then it is an unbalanced force and it will move the way that the greater force is pushing it. if you use only 300 n it will be a balanced force and will not move because the force you are exerting on the   box is the same as its force.

hope this !

im sorry if i went too in depth, i am going to include a link to a video on khan academy that will explain this.   hope that you like the video and that it explains more in detail to you.

that is the link.