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lianna [129]
4 years ago
7

A capacitor has 10 V initially across and it is instantaneously connected to a resistor. What is the voltage across the capacito

r after one time constant?
Physics
1 answer:
viva [34]4 years ago
7 0

Answer:

3.69 V

Explanation:

By connecting across the resistor, the capacitor starts discharging.

The voltage across the capacitor when discharging is given by

V = V_0e^{-t/T}

V is the voltage across it at time t,

V_0 is the initial voltage when fully charged,

T is the time constant

After one time constant, t = T. Then

V = V_0e^{-T/T}= 0.369V_0

From the question, V_0 =10 \text{ V}

V = 10\text{ V}\times0.369 = 3.69 \text{ V}

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Missing Details, Most Are Approximations,Simplicity

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3 years ago
The food calorie, equal to 4186 J, is a measure of how much energy is released when food is metabolized by the body. A certain b
rewona [7]

Answer:

The hiker has to climb 941.26 to ''work off'' the calories.

Explanation:

Let's first find out how much energy the hiker gets from 150 food calories.

This is:

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To burn all of this off, we set it equal to the gravitational potential energy, and then solve for the height.

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Gravitational Potential Energy (G.P.E) = 629700

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5 0
3 years ago
Solve -7= sqrt 2x-9​
Sauron [17]

Answer:

x = 2

Explanation:

if it was -7 = the square root of both 2x-9 together, it would be false.

if it was square root of just 2x in the equation, the answer is:

x = 2

°°°°°°°°°

-7 = √2x - 9

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4 0
3 years ago
A sled drops 50 meters in height on a hill. The mass of the rider and sled is 70 kg and the sled is going 10 m/s at the bottom o
navik [9.2K]

Answer:

Efficiency = 10.2 %

Explanation:

Given the following data;

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We know that acceleration due to gravity is equal to 9.8 m/s².

To find the efficiency of energy conversion from potential to kinetic;

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P.E = 34300 J

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Therefore, Input energy, I = 34300 J

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Efficiency = 3500/34300 * 100

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4 0
3 years ago
Figure 15-1 shows how a(n) ____________________ breeze works.
Firlakuza [10]
<h2>Right answer: Sea breeze </h2>

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Then, the air rises as the land warms it and the colder air located on the surface of the sea forms a high pressure zone that makes this air mass tend to occupy the space left by the warmer air that has ascended on the coast. Therefore, the mass of air of a high pressure on the ocean always tends to move towards the zone of low pressure located on the coast.

It is important to note that the <u>sea breeze blows perpendicularly to the coast</u> and that the best breezes are formed in the spring and summer seasons because during the spring the water temperature is still cold and during the summer the sun produces high temperatures over the land in the coast.


<h2>So, <u>the greater the temperature contrast </u>between the land and the sea, <u>the greater the force of the wind generated</u>.</h2>
8 0
4 years ago
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