A plane has an airspeed of 142 m/s. A 16.0 m/s wind is blowing southward at the same time as the plane is flying. If the velocity of the plane relative to Earth is due east, what is the magnitude of that velocity?
A) 16.2 m/s
B) 16.0 m/s
C) 158 m/s
D) 141 m/s
E) 48 m/s
D
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An engineer wants to use a river (minimum temperature of 
to cool his electrical plant which heats water with a boiler operating at 
If he wishes to produce 185 kW of power using this plant, what is the minimum energy he must supply to his boiler if it is maximally efficient?
A. 233 kW B. 187 kW C. 332 kW D. 418 kW
While ________ gas is the main atmospheric component of both Mars and Venus, its density means it plays a far larger role in heating Venus
Fill in the blank(s) with correct word
How do we learn about Earth’s core, mantle, and crust?
a. magnetic field studies b. seismic waves c. x-ray imaging d. all of the above e. a and b
When monochromatic X-rays are scattered by a material, the wavelength of the scattered radiation does not depend upon
A) the scattering angle. B) mass of the interacting particle. C) incident wavelength. D) the type of atom.