Two paths lead to the top of a big hill. One is steep and direct, while the other is twice as long but less steep. How much more potential energy would you gain if you take the longer path?

a) the same
b) twice as much
c) four times as much
d) half as much
e) you gain no PE in either case


Ans: a) the same

Physics & Space Science

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What is the wavelength of the matter wave associated with an electron moving with a speed of 2.5 × 107 m/s? (melectron = 9.11 × 10-31 kg, h = 6.626 × 10-34 J ? s)

A) 29 pm B) 35 pm C) 47 pm D) 53 pm

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You are driving a late model convertible at the 55 mph limit with its soft ragtop roof up and the windows closed. You observe that the roof

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The canals of Mars were eventually found to be crustal faults

Indicate whether the statement is true or false

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