Which standard unit is used to express frequency?

Which atom has the greatest mass? A. an atom with 8 protons, 7 neutrons, and 8 electrons B. an atom with 8 protons, 8 neutrons, and 8 electrons C. an atom with 9 protons, 6 neutrons, and 9 electrons D.

Could a volcanoe be thermal energy

Two cups of the same size are filled to the brim with clear liquids. Cup A holds water. Cup B contains alcohol. Your teacher challenges you to figure out which cup holds water.

A solution is measured to have a pH of 2.3. What is most likely also true about the solution? 1.) It has a low hydroxide ion concentration. 2.) It has a low hydronium ion concentration. 3.) It is neutral. 4.) It has no H2O molecules.

How much heat in joules is required to melt an ice cube with a mass of 18.6 g at 0 °C? The Lf for water is 333 J/g.

A boulder on top of a cliff has a potential energy of 12400J. How high above is the boulder?

If the graph represents speed what is measured on the x and y axes

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.