If a current flowing through a lightbulb is 0.75 ampere and the voltage difference across the lightbulb is 120 volts, how much resistance does the light bulb have

Explanation:

According to Ohm's law:  

Where:  

is the voltage difference across the light bulb

is the resistance of the light bulb   (the value we want to find)

is the electric current

Isolating :  

Finally:

 This is the resistance of the light bulb

wind moving at higher speeds will transfer more energy to the water, resulting in stronger waves.

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.