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3 years ago

Which is style of conclusion used in research reports

1 answer:

4 0

A conclusion is, in some ways, like your introduction. You restate your thesis and summarize your main points of evidence for the reader.You can usually do this in one paragraph.

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A 2.0-cm-diameter parallel-plate capacitor with a spacing of 0.50 mm is charged to 200 V?What is the total energy stores in the

Rama09 [41]

1) $1.11\cdot 10^{-7} J$

The capacitance of a parallel-plate capacitor is given by:

$C=\frac{\epsilon_0 A}{d}$

where

$\epsilon_0$ is the vacuum permittivity

A is the area of each plate

d is the distance between the plates

Here, the radius of each plate is

$r=\frac{2.0 cm}{2}=1.0 cm=0.01 m$

so the area is

$A=\pi r^2 = \pi (0.01 m)^2=3.14\cdot 10^{-4} m^2$

While the separation between the plates is

$d=0.50 mm=5\cdot 10^{-4} m$

So the capacitance is

$C=\frac{(8.85\cdot 10^{-12} F/m)(3.14\cdot 10^{-4} m^2)}{5\cdot 10^{-4} m}=5.56\cdot 10^{-12} F$

And now we can find the energy stored,which is given by:

$U=\frac{1}{2}CV^2=\frac{1}{2}(5.56\cdot 10^{-12} F/m)(200 V)^2=1.11\cdot 10^{-7} J$

2) 0.71 J/m^3

The magnitude of the electric field is given by

$E=\frac{V}{d}=\frac{200 V}{5\cdot 10^{-4} m}=4\cdot 10^5 V/m$

and the energy density of the electric field is given by

$u=\frac{1}{2}\epsilon_0 E^2$

and using

$E=4\cdot 10^5 V/m$ , we find

$u=\frac{1}{2}(8.85\cdot 10^{-12} F/m)(4\cdot 10^5 V/m)^2=0.71 J/m^3$

7 0

4 years ago

(Please help asap)

umka2103 [35]

Answer:

kiligrams

Explanation:

3 0

4 years ago

Calculate the mechanical advantage of a pulley system if only 10 lb is required to lift a 500 lb block

ExtremeBDS [4]

As we know that mechanical advantage is defined as the ratio of output force and input force for the pulley system

Here we know that it required 10 lb of input force in order to lift the block of 500 lb so here output force is 500 lb

now we have

$MA = \frac{F_{out}}{F_{in}}$

here we have

$F_{out} = 500 lb$

$F_{in} = 10 lb$

now from above formula we have

$MA = \frac{500}{10}$

$MA = 50$

so mechanical advantage of this system is 50

3 0

3 years ago

Calculate the resistance of a lamp if the current through it is 0. 4 A and the potential differnces across it is 8 V

Fofino [41]

Answer:

20 volts per amp (ohms), sorry the doesn't let me to type below than 20 characters

6 0

2 years ago

Which statement about types of waves and energy is correct?

evablogger [386]

Answer:

I think it's D and good luck

6 0

3 years ago

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