How is the mass number calculated for an element? a. the difference between the mass and the protons b. the sum of protons and neutrons c. there is no calculation. d. the product of neutrons and protons

An object is 10. cm from the mirror, its height is 3.0 cm, and the focal length is 2.0 cm. what is the image height? (indicate the object orientation by including the + or - sign with the answer.) hi = cm +1.33 -1.33 +0.75 -0.75

Which is an example of gaining a static charge by conduction? a) rubbing a balloon against your hair. b) shuffling your shoes across a carpet. c) bringing a charged rod near an electroscope. d) touching your car on a cold day and getting a shock.

The frequencies refer to the sample data collected from a population of interest when performing a hypothesis test comparing two or more population proportions.