How many protons are in an element with an atomic number of 8 and a mass number of 18?

18

10

8

3

What is difference between static electricity and current elecity ... ?

How does an electromagnet become permanent

A string of 18 identical Christmas tree lights are connected in series to a 130 V source. The string dissipates 61 W. What is the equivalent resistance of the light string? Answer in units of Ω.

This type of telescope uses a lens to collect light.

When a court has "___ ___" they can hear a case once a lower court has ruled on it. original jurisdiction appellate jurisdiction

What's the difference between the offspring of an asexual organism and a sexual organism

The contamination that results from the spread of bacteria from meat to vegetables is called

A rock has a mass of 5 kg on the moon. What is the mass of the rock on the earth

A battery applies 45 volts to a circuit, while an ammeter reads 10 ma. later, the ammeter reading drops to 7 ma. assuming the resistance has not changed, the voltage must have

A 150-kg object takes 1.5 minutes to travel a 2,500 - meter straight path. It begins the trip traveling 120 m/s and decelerates to a velocity of 20 m/s. What is the acceleration?