Which unit of length in the metric system would be most appropriate in size for measuring each of the following items?

d. the diameter of a baseball

Sketch two pieces of glassware: one that can measure volume to the thousandths place, and one that can measure volume only to the ones place.

(a) Name some words that contain the prefix "pro" or "proto" (b) Explain how someone who did not know the meaning of the word "protostar" could derive its meaning by looking at the word itself.

Which unit of length in the metric system would be most appropriate in size for measuring each of the following items?

a. the dimensions of this page
b. the size of the room in which you are sitting
c. the distance from New York to London
d. the diameter of a baseball
e. the diameter of a common pin

An astronomer observes several stars and records their respective colours, as shown in Table below. Using this data, order the stars by temperature from warmest to coolest.

$$\begin{matrix} \text{Star} & \text{Colour}\\ \text{10 Lacertra} & \text{bluish}\\ \text{Antares} & \text{reddish}\\ \text{Aldebaran} & \text{orange-ish}\\ \text{Canopus} & \text{bluish white}\\ \end{matrix}$$

For the piece of glassware, provide a sample measurement and discuss the number of significant figures and uncertainty.

For the pin discussed earlier, why is the third digit determined for the length of the pin uncertain? Considering that the third digit is uncertain, explain why the length of the pin is indicated as 2.85 cm rather than, for example, 2.83 or 2.87 cm.

If you were to measure the width of this page using a ruler, and you used the ruler to the limits of precision permitted by the scale on the ruler, the last digit you would write down for the measurement would be uncertain no matter how careful you were. Explain.

If you were to measure the width of this page using a ruler, and you used the ruler to the limits of precision permitted by the scale on the ruler, the last digit you would write down for the measurement would be uncertain no matter how careful you were. Explain.

When writing numbers using scientific notation, numbers greater than 1 have___ exponents and numbers less than 1 have___ exponents.

(a) Quasars are some of the most distant objects in the Universe. In which direction do the light waves from quasars most likely shift? (b) A scientist observing a quasar in 2009 is actually seeing the quasar as it existed in the early Universe. Explain why this is so.

Write a paragraph describing the relationships among our solar system, the Milky Way, the Local Group, and the Virgo Supercluster.

Describe two celestial bodies that may form in the final stages of the life cycle of a star that is more massive than the Sun.

If Polaris is 400 ly from Earth, what its distance from Earth in kilometers?