The atomic mass of potassium is 39. if its atomic number is 9, it has how many neutrons within each potassium atom?

Two satellites, X and Y, are orbiting Earth. Satellite X is 1.2 * 10^6 m from Earth, and Satellite Y is 1.9 * 10^5 m from Earth. Which best compares the satellites? Satellite X has a greater period and a faster tangential speed than Satellite Y.

What would a permanently magnetic substance be called?

Suppose we wrap a string around the surface of a uniform cylinder of radius 38.0 cm that is supported by an axle passing through its center.

Electromagnetic waves carry energy. This phenomenon is also called electromagnetic radiation. How is energy transferred in electromagnetic waves?

A uniform brick of length 26 m is placed over the edge of a horizontal surface. (x=26 m) What maximum overhang is possible for the single brick (without tipping) ?

In air an object weighs 15N. when immersed in water it weighs 12N. when immersed in another liquid it weighs 13N. determine the density of d object and that of d other liquid

You wash the dishes. when you let the water down the drain, where is the water flowing the fastest?

Are good conductors of heat also good conductors of electricity? Explain your answer.

Restate newtons first law of motion

This is the body of law that codifies what a state defines as legal and/or illegal as well as the punishments for the violations of the laws.