How many significant figures should be the product 62.25 x 37.4 have

a 2

b 3

c 4

d 7

What 2 characteristics of stars are shown in an H-R diagram?

When a chemical change happens we sometimes see a colour change. What other observations tell you that a chemical change is happening?

A gamma ray with an energy of 3.40 * 10-14 joules strikes a photographic plate. We know that Planck's constant is 6.63 * 10-34 joule·seconds. What is the frequency of the photon? 5.13 * 1019 hertz 5.60 * 1017 hertz 2.45 * 1017 hertz 2.

A lightbulb has an efficiency of 13.1%. How much light energy (not heat energy) is generated by the bulb every second if the bulb has a power of 8 W?

The speed of sound in liquids, gases, and solids is as follows, from fastest to slowest a Gas, liquid, solid b - Liquid, solid, gas c - Solid, liquid, gas

What is the mass of an object with a density if 4.0g/cm3 that displaces 3.0cm3 of water?

aluminum has 13 electrons. how many electrons are found in the outermost energy level for this atom which energy level is the outermost

For an ideal fluid flowing through a horizontal pipe, Bernoulli's principle and the continuity equation state that the pressure within the pipe does which of the following? (Assume measurements are taken along the pipe in the direction of fluid flow.

Which of the following is not part of testing a hypothesis? A. Making a theory B. Making a model C. Gathering evidence D. Collecting data

What are two types of charges that particles possess