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3 years ago

How is a dam used to generate electric energy?

Physics

2 answers:

Alexxandr [17]3 years ago

5 0

Answer:

Hydroelectric

Explanation:

Hydroelectric energy is usually generated by constructing a dam on a river, such that the water which flows through the dam is used to power turbines that generate electricity.

The quantity of energy that can be generated depends on the volume of water available and the difference in height between the water’s source and its outflow.

timofeeve [1]3 years ago

4 0

Hi have a nice day 464

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which of the following is an example of a compound machine. a. a bicycle chain. b. a coffee mug. c. a paper cutter

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A. a bicycle chain is an example of a compound machine

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2 years ago

Observe yourself breathing and count the number of times you inhale per second. During each breath you probably inhale 0.66 L of

Pavel [41]

To solve this exercise it is necessary to apply the concepts related to Robert Boyle's law where:

$PV=nRT$

Where,

P = Pressure

V = Volume

T = Temperature

n = amount of substance

R = Ideal gas constant

We start by calculating the volume of inhaled O_2 for it:

$V = 21\% * 0.66L$

$V = 0.1386L$

Our values are given as

P = 1atm

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$PV=nRT$

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$n = 5.761*10^{-3}mol$

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3 years ago

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3 years ago

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2 years ago

Read 2 more answers

5.An ice skater pushes against a wall with a force of 59 N. Ignoring friction, if the ice skater has

natali 33 [55]

Answer:

<em>Answer: (A) 0.75 m/s^2</em>

Explanation:

The Second Newton's law states that an object acquires acceleration when an external unbalanced net force is applied to it.

That acceleration is proportional to the net force and inversely proportional to the mass of the object.

It can be expressed with the formula:

$\displaystyle a=\frac{F_n}{m}$

Where

Fn = Net force

m = mass

The ice skater pushes against a wall with a force of 59 N. The wall returns the force and the skater now has a net force of Fn=59 N that makes him accelerate. Being m=79 kg the mass of the skater, the acceleration is:

$\displaystyle a=\frac{59}{79}$

$a = 0.75\ m/s^2$

Answer: (A) 0.75 m/s^2

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3 years ago