A Joule best represents which of the following? An amount that relates to the amount of energy in a system
The amount of electrical sparks throughout a system
A quantity representing the amount of matter in a closed system
A discrete value that represents the degrees of temperature of an open or closed system
A device that is considered contraband at your local high school

check my last question please

Explanation:

I really need the points check my last question it's due tomorrow please help me

Please help me, i have an essay and its due tomorrow. Basically i have to write a blurb (the summary of the book in the back text). it needs to be 150 words, so please be creative. Dont copy it from google. Thanks so much it really means alot, this will affect my apply to college.

when insulating materials rub against each other, they may become electrically charged . electrons , which are negatively charged, may be 'rubbed off' one material and on to the other. the material that gains electrons becomes negatively charged. the material that loses electrons is left with a positive charge.

force is based upon mass and acceleration.the statement is not always true.

it can be explained from newton's second law of motion.

as per newton's second law of motion the rate of change of momentum is directly proportional to the applied force and takes place along the direction of force.

mathematically it can be written as -

                                              ⇒      

here   k is the proportionality constant whose value is 1.

                                                            [a is the acceleration=dv/dt]

hence we see that force not only depends on mass and acceleration but also on velocity and rate of change of mass. force f will depend on mass and acceleration only when mass is constant.

hence the statement that force is based upon mass and acceleration is false.