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3 years ago

What is the reaction force of the table with a weight of 558N

Physics

1 answer:

Delicious77 [7]3 years ago

8 0

Answer: reaction force = -558N

Explanation:

w = f = 558N

since action force and reaction force are equal in magnitude and opposite in direction,

reaction force = -(f)

reaction force = -558N

if that helps.

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When two capacitors are connected in parallel across a 12.3 v rms, 1.46 khz oscillator, the oscillator supplies a total rms curr

Nana76 [90]

3.32ÂµF and 1.64ÂµF

Since, you haven't actually asked a question, I am going to make a guess on what the question is based upon the data provided. My educated guess is "What are the values of the two capacitors?"

The formula for the Capacitive reactance is

X = 1/(2*pi*f*C)

where

X = reactance

f = frequency

C = capactance

Let's solve for C

X = 1/(2*pi*f*C)

CX = 1/(2*pi*f)

C = 1/(2*pi*f*X)

Now with the capacitors in parallel, we have a reactance of:

I = V/X

IX = V

X = V/I

X = 12.3/0.56

X = 21.96428571

So the capacitance is:

C = 1/(2*pi*f*X)

C = 1/(2*pi*1460*21.96428571)

C = 4.96307x10^-6 = 4.96307 ÂµF

And with the capacitors in series we have a reactance of:

X = V/I

X = 12.3/0.124

X = 99.19354839

So the capacitance is:

C = 1/(2*pi*f*X)

C = 1/(2*pi*1460*99.19354839)

C = 1.09896x10^-6 = 1.09896 ÂµF

Now we can setup two equations with 2 unknowns.

4.96307 = x + y

1.09896 = 1/(1/x + 1/y)

y = 4.96307 - x

1.09896 = 1/(1/x + 1/(4.96307 - x))

1.09896 = 1/((4.96307 - x)/(x(4.96307 - x)) + x/(x(4.96307 - x)))

1.09896 = 1/(((4.96307 - x)+x)/(x(4.96307 - x)))

1.09896 = 1/(4.96307/(x(4.96307 - x)))

1.09896 = x(4.96307 - x)/4.96307

5.45422 = x(4.96307 - x)

5.45422 = 4.96307x - x^2

0 = 4.96307x - x^2 - 5.45422

0 = -x^2 + 4.96307x - 5.45422

We now have a quadratic equation. Use the quadratic formula to solve, getting roots of 3.320460477 and 1.642609523. You may notice that those 2 values add up to 4.96307. This is not coincidence. Those are the values of the two capacitors in ÂµF. Rounding to 3 significant figures gives us 3.32ÂµF and 1.64ÂµF.

5 0

3 years ago

Which best describes cosmic microwave background radiation? radiation thought to exist but not yet measured radiation predicted

grigory [225]

Answer: leftover radiation from the big bang

Microwave background radiation is a form of electromagnetic radiation that is present in the whole universe and completely fills it.

Its frequency belongs to the microwaves range and is one of the main demonstrations of the of the Big Bang theory model.

It is important to note the Big Bang occurred 400,000 years before the events related to the microwave cosmic radiation, this means the Big Bang occurred first.

8 0

3 years ago

As the result of a thermal inversion the prevailing air temperature profile increases 1°C/100m above the ground level. To what m

astra-53 [7]

Answer:

909.1 m

Explanation:

Rate of temperature increase with 100 m elevation = 1°C

h = Maximum Height

Adiabatic lapse rate = -0.65°C/100 m

We have the relation

$\dfrac{1^{\circ}C}{100}=\dfrac{15^{\circ}C}{h}+\left(-\frac{0.65}{100}\right)\\\Rightarrow \dfrac{1^{\circ}C}{100}+\left(-\frac{0.65}{100}\right)=\dfrac{15^{\circ}C}{h}\\\Rightarrow h=\dfrac{15^{\circ}C}{1.65^{\circ}C}\times 100\\\Rightarrow h=909.1\ m$

The maximum height is 909.1 m

5 0

3 years ago

How do i do this is hard

Zolol [24]

Answer:

I believe it would be E)none of the above.

Explanation:

7 0

3 years ago

What are the units for the spring constant, k? A. newton meters B. newton seconds C. newtons/meter D. newtons/second E. newtons/

mr Goodwill [35]

Answer:

C. N/m (newtons/meter)

Explanation:

Since the equation for potential energy for a spring is PE = 1/2kx², after you know <em>k </em>and <em>x</em>, you will get an answer in Joules.

Please let me know if you want me to explain further!

Thanks!

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3 years ago

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