How can you calculate the number of electrons in an atom

A boy and his skateboard have a combined mass of 65 kg. What is the speed of the boy and skateboard if they have a momentum of 275 kg •?

Why is having a scientific model of an Atom important

Why do you think baseball in referred as "America's past time" A) because it's enormous popularity as a spectator sport B) because the founding fathers liked to play C) Becouse Americans would rather play baseball then work D) none of the above

What is the speed of a light ray (f   5.09 x 10 14 Hz) in corn oil?

On the electromagnetic spectrum, microwaves are located between infrared waves and radio waves. Which is true for microwaves? A) They have a higher frequency than visible light. B) They have a shorter wavelength than ultraviolet rays.

Which are strong bases? Check all that apply. HCI NaOH NH3 H2CO3 ΠΗΝΟΣ OKOH

The universal force that is effective over the longest distance is called? A:electromagnetic B: strong nuclear C: weak nuclear D: gravity

What is a string theory?

Two two advantages and hazards of nuclear reaction.

Magnetic fields and electric fields are identical in that they both-