Which of the following materials is an insulator against electric current

A - a sliver spoon

B - aluminum foil

C-a glass pane

D - a copper penny

Disadvantages of energy

As a ball falls freely toward the ground, its total mechanical energy (1) decreases (2) increases (3) remains the same

What additional information is needed for velocity that uis not needed for speed?

Earth exerts a gravitational force on the moon. why doesn't the force of gravity pull the moon into the earth?

What is the current in a 160V circuit if the resistance is 2Ω?

A conductor, with outer surface labelled a, contains a cavity, inner surface b. In this cavity there is a conducting sphere of radius r, and surface c. The sphere carries a charge of 1 C, while the conductor a charge of 2 C.

A spring (k = 790 N/m) has a length of 48 cm when zero net force is applied to it. What will its length be when 230 N of force is applied to stretch it? Question 3 options: 3.4 m 0.77 m 3.9 m 0.29 m

Inert gas used to make bright city lights True or False

A boulder on top of a cliff has a potential energy of 12400J. How high above is the boulder?

If the graph represents speed what is measured on the x and y axes