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3 years ago

ElectroMagnetic---WaveLength Range (Meters)

Physics

1 answer:

MrRa [10]3 years ago

4 0

Electronegativity, symbol χ, measures the tendency of an atom to attract a shared pair of electrons (or electron density). An atom's electronegativity is affected by both its atomic number and the distance at which its valence electrons reside from the charged nucleus.

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A coaxial cable is 10 meters long, and is filled with lossless Teflon, having a relative permittivity of 2.1. There is a matched

sattari [20]

My milkshake brings all the boys to the yard

And they're like, it's better than yours

Dam right it's better than yours

I can teach you, but I have to charge

My milkshake brings all the boys to the yard

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My milkshake brings all the boys to the yard…

6 0

3 years ago

ALWAYS use significant figure rules. Remember that these rules apply to all numbers that are measurements.

natali 33 [55]

Answer:

Well I'm going to go with A.

Explanation:

As per the question the mass of the boy is 40 kg.

The boy sits on a chair.

We are asked to calculate the force exerted by the boy on the chair at sea level.

The force exerted by boy on the chair while sitting on it is nothing else except the force of gravity of earth i.e the weight of the body .The direction of that force is vertically downward.

At sea level the acceleration due to gravity g = 9.8 m/s^2

Therefore, the weight of the boy [m is the mass of the body]

we have m = 40 kg.

Therefore, w = 40 kg ×9.8 m/s^2

=392 N kg m/s^2

= 392 N

392 is not an option but I'm guessing you can round down 2 .to option A. 390...?

8 0

3 years ago

A circuit has a voltage drop of 12.0 V across a 30.0 resistor that carries a current of 0.400 A. What is the power used by the r

Aloiza [94]

Option ( c ) is correct.

Using the formula for power

$P= i^2 R$

P= power

i= current= 0.4 A

R= resistance= 30 ohm

so power= (0.4)² (30)

Power=4.8 W

7 0

3 years ago

Read 2 more answers

What is known physical quantity

jeka94

The quantities which are measured is called physical quantity.

Ex - Time, Length, Density. etc.

I hope it's help you..

Thanks♥♥

5 0

2 years ago

A 780 g , 54-cm-long metal rod is free to rotate about a frictionless axle at one end. While at rest, the rod is given a short b

evablogger [386]

Answer:

The angular velocity is 35.5 rad/s.

Explanation:

Step 1: Find the moment of Inertia for the rod

The moment of inertia, I, of a rod:

$I=\frac{1}{12} ML^{2}$ .......... (1)

where M = mass of rod (0.78 Kg); L = Length of rod (0.54 m).

$I=\frac{1}{12} (0.78)(0.54)^{2} =0.019\frac{Kg}{m^{2} }$

Step 2: Calculate the angular acceleration from Rotational kinetic notation

F.r = I.α ........... (2)

where F is the force acting upon the rod; r is the half length of the rod; I is the moment of Inertia and; α is the angular acceleration.

∴ (1000 N)(0.27 m) = 0.019α

α = 270 Nm / 0.019 Kgm²

α = 14210.5 rad/s

Step 3: We find the angular velocity by using the equation below:

ωf = ωi + αt ......... (3)

where

ωf is the angular velocity after the blow

ωi is the angular velocity before the blow = 0

t is the time taken for the blow to occur = 2.5 ms

ωf = 0 + (14210.5 rad/s)(2.5 ms) = 35.5 rad/s.

6 0

3 years ago

ElectroMagnetic---WaveLength Range (Meters)​

ElectroMagnetic---WaveLength Range (Meters)