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4 years ago

For which optical devices does d sometimes have a positive value

Physics

1 answer:

Vlad [161]4 years ago

8 0

Answer:

B) A & C

Explanation:

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A parallel-plate capacitor has circular plates and no dielectric between the plates. Each plate has a radius equal to 2.8 cm and

Snezhnost [94]

Answer: $1.88\times 10^{14} V/m-s$

Explanation:

Given

radius of capacitor Plate $r=2.8 cm$

Area $A=\pi r^2=\pi \times 2.8^\times 10^{-4} m^2$

$A=24.63\times 10^{-4} m^2$

current $I=4.1 A$

separation $d=1.1 mm$

Electric Field strength is given by

$E=\frac{Q}{\epsilon _0A}$

$E=\frac{I\cdot t}{\epsilon _0A}$

$\frac{\mathrm{d} E}{\mathrm{d} t}=\frac{I}{\epsilon _0A}$

$\frac{\mathrm{d} E}{\mathrm{d} t}=\frac{4.1}{8.85\times 10^{-12}\times 24.63\times 10^{-4}}$

$\frac{\mathrm{d} E}{\mathrm{d} t}=1.88\times 10^{14} V/m-s$

8 0

3 years ago

Unlike an observational study, an experiment can prove:

Zinaida [17]

A. Cause and effect.

Explanation:

An experiment can prove cause and effect in a study unlike observational studies.

Observational studies is a non-experimental system of investigation.
It helps to identify the causes(independent variable) and the effect(dependent variables).
In observational studies, the variables cannot be controlled and so it is difficult to prove the cause and effect.
An experiment can prove cause and effect because the parameters are tested and can be controlled.

Learn more:

Experiment brainly.com/question/5096428

#learnwithBrainly

3 0

3 years ago

While hiking in the mountains, tanya observed a narrow and steep valley with a stream at the bottom of it. what most likely caus

Juliette [100K]

Erosion over thousands of millennia from the stream or river in the valley

5 0

3 years ago

Read 2 more answers

If an oxygen molecule traveling at the rms speed bounces back and forth between opposite sides of a cubical vessel of 0.10 m on

Alisiya [41]

Answer:

1.25x10^-19N

Explanation:see attached file pls

5 0

3 years ago

As a train accelerates away from a station, it reaches a speed of 4.9 m/s in 5.1 s. If the train's acceleration remains constant

vodomira [7]

Acceleration is the rate of change of the velocity of a moving object. To determine the speed the object has at a certain time, we need to determine the acceleration first by dividing the speed with the time given. We do as follows:

acceleration = 4.9 m/s / 5.1 s = 0.96 m/s^2

To determine the velocity after 7.1 s, we multiply 7.1 s to the acceleration.

speed or velocity = 0.96 x 7.1 = 6.52 m/s

3 0

3 years ago

Read 2 more answers