If element X has 78 protons, how many electrons does it have?

if a current flowing through a lightbulb is 0.75 ampere and the voltage differences across the lightbulb is 120 volts how much resistance does the lightbulb have

What is the best explanation of work? A. Work occurs when a force acts on an object. B. Work occurs when force acts to hold an object in place. C. Work occurs when energy acts on an object. D.

A small glass bead has been charged to + 30 nc. part a what is the the acceleration of a proton that is 1.

How many total atoms are in one molecule of nickel hydroxide, Ni (OH) 2?

What is one reason supporting genetic modifications to food

How to identify additional materials

Tarzan runs at 6 m/s and grabs a vertical vine (negligible mass) 4.1 m long which is tied to a tree at the top. Tarzan swings up. Determine the maximum height Tarzan will swing up and the angle the vine makes respect to vertical.

What is the safest place to be amid the coronavirus?

What is the change in internal energy if 60 J of heat are added to a system and the system does 40 J of work on its surroundings? Use AU = Q-W.

A 35-N bucket of water is lifted vertically 3.0 m and then returned to its original position. How much work did gravity do on the bucket during this process?