Introduction to MasteringAstronomy

Practice entering numbers that include a power of 10 by entering the diameter of a hydrogen atom in its ground state, dH=1.06×10−10m , into the answer box. Express the diameter of a ground-state hydrogen atom in meters using a power of 10. Do not enter the units; they are provided to the right of the answer box. dH

1.06x10^-10m

What value should you use as the area of the base when calculating the answer to Part C?

11.76 cm^2

(Figure 1) (The link above tells you that this Part has an illustration.) How many months of the year have 28 days?

12

Suppose you are asked to find the area of a rectangle that is 2.1-cm wide by 5.6-cm long. Your calculator answer would be 11.76 cm2 . Now suppose you are asked to enter the answer to two significant figures. (Note that if you do not round your answer to two significant figures, your answer will fall outside of the grading tolerance and be graded as incorrect.) Enter your answer to two significant figures and include the appropriate units.

12 cm^2

If you have a gross of items, you have 144 items. If you buy a gross of eggs, how many dozen eggs do you have? Express your answer in dozens. Do not enter the units; they are provided to the right of the answer box.

12 dozen

When entering large numbers in the answer box, do not use commas. For example, enter 1276400‎ for the number 1,276,400. Do not enter 1,276,400‎. If you accidentally enter commas, you will receive feedback as a reminder. Answer the following question by typing the numeric answer into the answer box. What is the sum of 9260 and 3240? Express your answer numerically to at least three significant figures.

12500

Rank these shapes from greatest to fewest number of sides. To rank items as equivalent, overlap them.

Octogon Hexagon Pentagon Square, rectangle triangle

___ Is the capital of Norway

Oslo

(Figure 2) contains eight boxes. One of the boxes contains something different from the others. (The link provided in this part tells you that there is a different figure for Part B. Click on the link or click on the dropdown menu to the left to change from the Part A figure to the Part B figure.) Which box contains something different from the other boxes? (You could guess randomly, but if you are not sure about an answer, select View Available Hint(s) to view the hints.)

Box C

The capital of Argentina is___

Buenos Aires

Using the correct answer from Part B, calculate the volume of a rectangular prism with a length of 5.6 cm, a width of 2.1 cm, and a height of 6.6 cm . Enter your answer to two significant figures and include the appropriate units.

78 cm^3

If you are asked to provide a set of two or more numeric answers, separate them with commas. For example, to provide the year that Sputnik (the first satellite to be sent into orbit around the Earth) was launched and the year humans first walked on the Moon, you would enter 1957,1969 in the answer box. A rectangle has a length of 5.50 m and a width of 12.0 m . What are the perimeter and area of this rectangle? Enter the perimeter and area numerically separated by a comma. The perimeter should be given in meters and the area in square meters. Do not enter the units; they are provided to the right of the answer box.

35.0 m, 66.0 m^2

You can find more information about how you are graded by clicking on the Grading Policy link at the top of each assignment page.To view your instructor's grading policy now, return to your assignment page. When you come back and open this item again, your work will continue from where you left off. Which of the following actions do not cause you to lose credit?

Answering a part correctly

Would an answer that generated the response below be considered correct and give you full credit? Significant Figures Feedback: Your answer 12499 was either rounded differently or used a different number of significant figured required for this part.

Yes

Fruits

apple, tomato, banana, avocado

___ is the capital of australia

canberra

veggies

carrot, potato

___ is the capital of indonesia

jakarta

the capital of kenya is ____

nairobi

The capital of canada is

ottowa