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AleksandrR [38]
3 years ago
7

iagara Falls is a set of very large waterfalls located on the border between New York and Ontario, Canada. Over 200,000 cubic fe

et of fast-moving water falls approximately 180 feet every second. Water at the top of the Falls possesses
Physics
1 answer:
MissTica3 years ago
3 0

Water at the top of Iagara Falls possesses gravitational potential energy
because of its height, and kinetic energy because of its motion. 

A lot of this energy is tapped off of the stream as the water falls, and is
used to generate electrical energy.

180-ft = about 54.9 meters

1 kilogram (1 liter) of water loses about

                     (1 kg) x (9.8 m/s²) x (54.9 m)

                 =      about 538 joules of potential energy,
                         while falling from the top of Iagara Falls
                         to the pool at the bottom.
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A sample of nitrogen gas has a volume of 5.0 ml at a pressure of 1.50 atm. what is the pressure exerted by the gas if the volume increases to 30.0 ml, at constant temperature is 0.25atm.

On constant temperature, the pressure and volume relation become constant before and after the change in quantitities have occurred.

According to Boyle's Law,

P₁V₁ = P₂V₂

where, P₁ is pressure exerted by the gas initially

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V₂ is the volume of gas finally

Given,

P₁ = 1.5 atm

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On substituting the given values in the above equation:

P₁V₁ = P₂V₂

1.5 atm × 5 ml = P₂ × 30 ml

P₂ = 0.25 atm

Hence, pressure exerted by the gas is 0.25atm.

Learn more about Boyle's Law here, brainly.com/question/1437490

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Two resistors, R1 and R2, are
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Answer:

The value of R₂ is equal to 24.75 ohms.

Explanation:

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When two resistors are connected in parallel. The equivalent resistance is given by :

\dfrac{1}{R_{eq}}=\dfrac{1}{R_1}+\dfrac{1}{R_2}\\\\\dfrac{1}{14.5}=\dfrac{1}{35}+\dfrac{1}{R_2}\\\\\dfrac{1}{R_2}=\dfrac{1}{14.5}-\dfrac{1}{35}\\\\\dfrac{1}{R_2}=0.04039\\\\R_2=\dfrac{1}{0.04039}\\\\R_2=24.75\ \Omega

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