A truck and a car are traveling down the highway at the same speed. If the truck has a greater mass than the car, how do their kinetic energies compare?

Julia would be observing a. static electricity was caused by her sweater rubbing against her shirt and transferring electrons. she didn't touch anything metal, so that would cancel out b.she most likely didn't rub her sweater against her hair either, so that cancels out c.she also didn't scoot across the carpet while trying to take her sweater off, that cancels out d.so that leaves a.a. is correct.

Electoral current force mechanical advantage if the wheel and axle is 2 n and the output force is 20 n

No because a circle or pie graph usually shows percentages you'd need a line graph

This is what a calorimeter is used for simpler ex, to measure calories in food.