In a recent year, the United States consumed 29,000,000,000,000 kWh of energy. Express this value in MWh, GWh, TWh, and PWh. See Table 2.2 for the list of decimal multiples and prefixes used with SI base units.
What will be an ideal response?
29,000,000,000,000 kWh
= 29,000,000,000 MWh = 29,000,000 GWh = 29,000 TWh = 29 PWh
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Distinguish between AC and DC. When you plug a light bulb into a wall socket, where do the electrons come from?
What will be an ideal response?
What type of graph would be best for showing the relationship between two quantitative variables?
A) statistics table B) bar graph C) scatter plot D) pie chart E) data table
What topographic evidence (other than the glaciers entering the water) suggests that the Tracy Arm is a fjord?
The question is based on Map T-14, the “Sumdum (D-4), Alaska” quadrangle (scale 1:63,360; contour interval 100 feet). The map shows two glaciers entering the “Tracy Arm.” The Tracy Arm is a fjord just south of Juneau, Alaska (see Exercise 49 for a brief discussion of fjords). The “Sawyer Glacier” enters the Tracy Arm from the north and the “South Sawyer Glacier” enters the Tracy Arm from the southeast (57°52'27"N, 133°10'33"W). What will be an ideal response?
The present-day tilt of Earth's axis of rotation is 23.5º. What would be the result of less tilt, as shown here?
A. more hours of sunlight on the equator, resulting in warmer global temperatures B. high latitudes would receive less direct sunlight during the summer, causing cooler temperatures C. a decrease in glaciers D. All of these choices are correct.