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3 years ago

What are the limitations of using solar panels?

Physics

1 answer:

Anit [1.1K]3 years ago

7 0

Answer:

The amount of the sun energy that could be collected.

Explanation:

Some limitations are, the amount of the sun's energy that could be collected the radiation of sun is nearly fixed. The place where we can put the solar panels are also limited.

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A car moved 60 km East and 90 km West. What is the displacement?

Reptile [31]

Answer:

We have been given that car is moving 60 km in east

And 90 km in west

That means we are given two different directions

So, if distance in East is taken to be positive 60 km

Then the distance when car is moving in west direction will be taken as -90 km

So, the displacement means how far the object is from to initial to final position.

So, the displacement will be (-90)+60 = -30

So, it will be in -30 km (minus is west direction).

7 0

3 years ago

Using the formula for work, Match the Force × Distance problems with their correct "Work Performed" answer. The first example ha

Elina [12.6K]

Answer: The answer is in the figure attached.

Explanation:

The Work $W$ done by a Force $F$ refers to the release of potential energy from a body that is moved by the application of that force to overcome a resistance along a path.

It should be noted that it is a scalar magnitude, and its unit in the <u>International System of Units</u> is the Joule (J). Therefore, 1 Joule is the work done by a force of 1 Newton when moving an object, in the direction of the force, along 1 meter:

$1J=(1N)(1m)=Nm$

However, in the British Engineering and Gravitational Systems its unit is Foot-pound (ft-lb). Where $1ft-lb=1.355818J$

Now, when the applied force $F)$ is constant and the direction of the force and the direction of the movement (traveled distance) $d$ are parallel, the equation to calculate it is:

$W=(F)(d)$

So, taking into account the explanation above, the attached table shows the Work done for each situation.

3 0

3 years ago

Find the intensity of a 55 dB sound given lo-10-12 wm2

Inessa05 [86]

Answer:

Intensity= $I=3.16\times 10^{-7}\ W\ m^{-2}$

Explanation:

Given:

$\beta=55\ dB\\I_o=10^{-12}\ W\ m^{-2}$

The sound level $\beta$ in dB with intensity $I$

and reference intensity $I_0$ is given by:

$\beta(dB)=10 \log_{10}(\frac{I}{I_0})$

Plugging in values.

$55=10 \log_{10}(\frac{I}{10^{-12}})$

Dividing both sides by 10.

$\frac{55}{10}=\frac{10 \log_{10}(\frac{I}{10^{-12}})}{10}$

$5.5=\log_{10}\frac{I}{10^{-12}}$

The above can be written as

$10^{5.5}=\frac{I}{10^{-12}}$

Multiplying both sides by $10^{-12}$

$10^{5.5}\times 10^{-12}=10^{-12}\times \frac{I}{10^{-12}}$

$10^{(5.5-12)}=I$

$10^{(-7.5)}=I$

∴ $I=3.16\times 10^{-7}\ W\ m^{-2}$

Intensity = $I=3.16\times 10^{-7}\ W\ m^{-2}$

7 0

3 years ago

A rubber balloon has become negatively charged from being rubbed with a wool cloth, and the charge is measured as 1.00 × 10−14 C

inysia [295]

Answer:

1.60 x 10-10 C

Explanation:

5 0

3 years ago

The origin of the universe remains a question. The most accepted theory, that suggests our universe started as a hot, dense, com

svlad2 [7]

<span>C option is correct which is big bang theory. According to this theory in start there was no system of earth and all planets were combined. Then there was explosion due to which planets originated and the system of earth and universe started.</span>

3 0

3 years ago

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