4. When referring to the element phosphorus on the periodic table

osphorus on the periodic table, the number 15 represents

A. energy level.

B. atomic weight.

C. atomic number.

D number of atoms.

A 385-g tile hangs from one end of a string that goes over a pulley with a moment of inertia of 0.0125 kg ⋅ m2 and a radius of 15.0 cm. A mass of 710 g hangs from the other end of the string.

Many military submarines are powered by on-board nuclear reactors. This type of energy source is favored because A. They can be converted into nuclear weapons at a moment's notice for use in wartime B.

You have a cylindrical balloonship with the mass of 25 000kg, how should I calculate the airfriction on it's speed?

Why can we see liquids and solids but not gases?

Factors that affect your fitness health and wellness are called

It is difficult to lift a heavy stone than the lighter one on the earth, why?

The vapor pressure of ethanol at 25 degrees C is 7.83 kPa. Calculate the vapor pressure in atm. Round answer to 3 significant digits.

According to Newton's second law of motion acceleration or an object depends upon the ___ of the object and the ___ Acting on it. I'm confused on what the blanks are. I can't find them.

What is the concentration of H + ions at a pH = 7?

Suppose that Paul D. Trigger fires a bullet from a gun. Will the speed of the bullet leaving the muzzle will be the same as the speed of the recoiling gun? Explain.