What is the relationship between the mass of an object and the amount of force required to drag it across the table?

In a closed system, the total energy prior to an energy transformation is the total energy after. a. equal to b. unrelated to c. greater than d. less than

Orange juice has a lower or higher viscosity than chocolate syrup

Which of the following changes will result in a stronger electromagnet? a. using fewer coils of wire b. using a higher voltage c. using a shorter nail d. using a longer wire