The United States' most abundant fuel supply is ______________

Fill in the blank(s) with correct word


coal

Physics & Space Science

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It is important for the continued existence of all life that not all the copies of deoxyribonucleic acid (DNA) be exact duplicates

Indicate whether the statement is true or false

Physics & Space Science

The H? line has a wavelength of 434.0 nm when observed in the laboratory. If the H? line appears in a stars spectrum at 434.5 nm, what is the radial velocity of the star?

a. 346 km/s away from the observer b. 346 km/s toward the observer c. 1.3 × 10^8 m/s away from the observer d. 1.3 × 10^8 m/s toward the observer e. The radial velocity of the star cannot be determined from this information.

Physics & Space Science

A heat engine operating at maximum efficiency has an efficiency of 25%. The temperature of the cold reservoir is 300 K. What is the temperature of the hot reservoir?

A) 350 K B) 375 K C) 400 K D) 450 K E) 500 K

Physics & Space Science

Large, flat areas of sediments on the ocean basins are called

a. abyssal plains. b. guyots. c. continental shelves. d. atolls.

Physics & Space Science