Pedalling a bicycle into a 30 km/h wind requires how much more effort compared to pedalling into a 10 km/h wind?

A. eighteen times as much
B. nine times as much
C. six times as much
D. three times as much


Answer: B

Environmental & Atmospheric Sciences

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One social science principle of sustainability is that we should leave the planet's life-support systems in at least as good a condition as that which we now enjoy, if not better, for future generations.

Answer the following statement true (T) or false (F)

Environmental & Atmospheric Sciences

Blowing a threatening extraterrestrial object into small pieces would likely increase the hazard to Earth

Indicate whether the statement is true or false

Environmental & Atmospheric Sciences

Energy is the capacity to do work

Indicate whether the statement is true or false

Environmental & Atmospheric Sciences

An example of a silicate mineral with a double-chain structure is:

a. augite b. hornblende c. corundum d. plagioclase feldspar

Environmental & Atmospheric Sciences