Why must a measurement include both a number and a unit?

Which of the following is true for a dry cell? a) It contains boric acid, which is a solid acid. b) The graphite rod does not undergo reduction, even though it is the cathode. c) It can be recharged many times. d) all of the above

Name two properties that display periodicity across the periodic table.?

How does a scientist form a hypothesis? A. A scientist forms the hypothesis after carefully analyzing the data. B. A scientist makes a theory about the outcome of the experiment. C.

How is heating of sugar and heating of ammonium chloride different from each other? Explain your answer.

What is an ionic bond in an electron?

What kind of energy can be lost in a system?

Why the output force exerted by a rake must be less than the input force

Two body systems that are affected by common cold

The cell theory has three main components. Which three scientists' conclusions formed these components?

Which of the following is not an organic molecule? a. glucose b. triglyceride c. protein d. water e. dna