Chapter 1: Q14. (page 18)
One hectare is defined as. One acre is. How many acres are there in one hectare?
Short Answer
There are possibly acres in one hectare.
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Chapter 1: Q14. (page 18)
One hectare is defined as. One acre is. How many acres are there in one hectare?
There are possibly acres in one hectare.
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A storm dumps 1.0 cm of rain on a city that is 6 km wide and 8 km long in a 2 h period. How many metric tons (1 metric ton =) of water fell on the city? (of water has a mass of.) How many gallons of water was this?
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What are the dimensions of density, which is mass per volume?
The smallest meaningful measure of length is called the Planck length, and it is defined in terms of three fundamental constants in nature: the speed of light , the gravitational constant , and Planck’s constant . The Planck length is given by the following combination of these three constants:
Show that the dimensions ofare length [L], and find the order of magnitude of. [Recent theories (Chapters 32 and 33) suggest that the smallest particles (quarks, leptons) are ‘strings’ with lengths on the order of the Planck length,. These theories also suggest that the ‘Big Bang’, with which the universe is believed to have begun, started from an initial size on the order of the Planck length.]
You are lying on a beach, with your eyes 20 cm above the sand. Just as the sun sets, fully disappearing over the horizon, you jump up. Your eyes are now 150 cm above the sand, and you can just see the top of the sun. If you count the number of seconds (= t) until the sun fully disappears again, you can estimate the earth’s radius. However, for this problem, use the known radius of the earth to calculate the time t.
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