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3 years ago

What are the answers?

Physics

1 answer:

White raven [17]3 years ago

3 0

19 incisions me know the status of my order if it is still mad at me for not get to the you're not get the email from the other side of all of zoee the present time the way back to the house to get to the bank to get to go home and get it done today if that works with each of cuts off the present moment and pay the rest of the day off to work till 12 pm on my way to work till 12 the way home and then she was so happy to see me now that the weather is for a call from a present from my home computer and lighter than the one the best teacher and she is doing better but it's 6 this is only for school tomorrow and lighter note to self don't know how much much more to say but it's the best thing that ever since the way home from my way to the airport now waiting now to get to go home yesterday the present and lighter and will not have the money to give the present and lighter than the last time she said she was confused on what time to pick me know what the next steps are the best teacher ever since that was so sweet and pay pay being in my home computer now but i no this is the first I've heard of it before and pay for it but it's 6 your phone so if it's ok I'll answer the present and the way they were he was going to call from my phone to the bank to see me today and pay the present moment and lighter than the last time to pick up the present moment to look for school and pay the way to the end of zoee the woods and lighter and pay the rest of the day so i no your fine if not then I'll have no internet at school today to see how it said that she said she was so happy dance class now and then and there at school tomorrow so that she could see the woods with our new home and then and pay for school tomorrow on my way back to the bank to the airport now to see me now or hey hey hey i was just typing random words

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In Burglar alarm LDR acts as a/an a. off switch b. on switch c. AND gate d. OR gate

Gelneren [198K]

In Burglar alarm, LDR acts an AND gate.

Answer: C

Explanation

The LDR is light dependent resistor. The principle used in the working of LDR is that the resistance is inversely proportional to the intensity of light falling on the diode.

In burglar alarm, LDR diode is combined with an IC 555.

Normally an LED source is made to be incident on the LDR diode with same intensity such that the resistance will be maintained constant.

As the LDR is connected with IC, the voltage will be high when light is falling on the diode.

The IC will give only two output states that is high and low. This confirms that LDR in burglar alarm act as AND gate.

As the thief enters and crosses the LED light, the intensity of the light falling on the diode will decrease leading to decrease in the voltage which will cause the alarm to beep.

4 0

3 years ago

A small segment of wire contains 10 nC of charge. The segment is shrunk to one-third of its original length. A proton is very fa

Alik [6]

To solve this problem we will apply the concepts related to the electric field, linear charge density and electrostatic force.

The electric field is

$E = \frac{\lambda}{2\pi \epsilon_0 r}$

Here,

$\lambda$ = Linear charge density

$\epsilon_0$ = Permittivity of free space

r = Distance

The linear charge density can be written as,

Linear charge density is given as

$\lambda = \frac{q}{L}$

Replacing,

$E = \frac{\frac{q}{L}}{2\pi \epsilon_0 r}$

$E = \frac{q}{2\pi \epsilon_0 rL}$

The initial and final electric Force can be written as function of the charge and the electric field as

$F_i = E_i q$

$F_f = E_f q$

If we replace the value for the electric field we have,

$F_i = (\frac{q}{2\pi \epsilon_0 rL})q = (\frac{q^2}{2\pi \epsilon_0 rL})$

Length is one third at the end, then

$F_f = (\frac{q}{2\pi \epsilon_0 r(L/3)})q = (\frac{3q^2}{2\pi \epsilon_0 rL})$

The ratio of the force is

$\frac{F_f}{F_i} = \frac{(\frac{3q^2}{2\pi \epsilon_0 rL})}{(\frac{q^2}{2\pi \epsilon_0 rL})}$

$\frac{F_f}{F_i} = 3$

Therefore the required ratio is 3

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3 years ago

What is specific latent heat mean in simple word?

Nuetrik [128]

Answer:

Amount of energy required to change the 1kg of a substance without changing its temperature.

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2 years ago

HELP ASAP!!!!!!! PLEASE WILL GIVE BRAINLIEST

svp [43]

Answer:

cell membrane- controls what goes in and out of a cell

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3 years ago

Is force a vector, scalar, both, neither

AysviL [449]

Answer:

Hello Adam Here! :D

Explanation:

A scalar quantity is defined as the physical quantity that has only magnitude, for example, mass and electric charge. On the other hand, a vector quantity is defined as the physical quantity that has both magnitude as well as direction like force and weight. The other way of differentiating these two quantities is by using a notation.

OH YEAH! XD

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3 years ago

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