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IRINA_888 [86]
2 years ago
11

Whether microwaves are produced by rotational spectrum​

Physics
1 answer:
lara [203]2 years ago
5 0

Answer:

<h2>Occipital : from Latin occiput "back of the skull", from ob "against, behind" + caput "head". Distinguished from sinciput (anterior part of the skull).</h2>

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Electric current flows through a long rod generating thermal energy at a uniform volumetric rate of
mario62 [17]
I don't know if you need to complete this question or do it otherwise, however, I managed to find on the Internet on several places this completion of your sentence:
<span>Electric current flows through a long rod generating thermal energy at a uniform volumetric rate of q = 2 x 10</span>⁶ W/m³. 
I'm not sure whether that is the answer you were looking for, but that's what I found.
5 0
2 years ago
You are looking down on a N = 9 turn coil in a magnetic field B = 0.5 T which points directly down into the screen. If the diame
Novay_Z [31]

Answer:

The magnitude of the voltage is 2.27\times10^{-4}\ V and the direction of the current is clockwise.

Explanation:

Given that,

Number of turns = 9

Magnetic field = 0.5 T

Diameter = 3 cm

Time t = 0.14 s

We need to calculate the flux

Using formula of flux

\phi=NAB

Put the value into the formula

\phi=9\times\pi\times(1.5\times10^{-2})^2\times0.5

\phi=0.003180

We need to calculate the emf

Using formula of emf

\epsilon=-\dfrac{d\phi}{dt}

\epsilon=-\dfrac{0.003180}{0.14}

\epsilon =-0.000227\ V

\epsilon=-2.27\times10^{-4}\ V

Negative sign shows the direction of current.

Hence, The magnitude of the voltage is 2.27\times10^{-4}\ V and the direction of the current is clockwise.

8 0
3 years ago
Can anyone help me with this please​
Anastasy [175]

Answer:

1270 J

Explanation:

Recall that the mechanical energy of a system is the addition of the Potential energy and the Kinetic energy at any given time.

As the skier descends, potential energy is converted into kinetic energy, but the total mechanical energy should remain the same.

We see that it is not the case, so that difference is what has gone into thermal energy;  19500 J - 18230 J = 1270 J

7 0
3 years ago
what is the power of an electrical device which operates with a current of 12.4 A and a potential difference of 12 V​
jek_recluse [69]

148.8 Watts

Explanation:

P = VI

= (12 V)(12.4 A)

= 148.8 Watts

3 0
2 years ago
Assume that the operating cost of a certain truck (excluding driver's wages) is 12+x/6 cents per mile when the truck travels at
podryga [215]

Answer:

x = 60 mph

Explanation:

Given that the operating cost is

c = 12 + \frac{x}{6} cents per mile

total miles covered is given as

d = 400 miles

so total cost of drive is given as

C = (12 + \frac{x}{6})(4) $

time taken by the truck to move the distance is given as

t = \frac{400}{x}

So total earnings of the driver is given as

E = \frac{400}{x} \times 6 $

now total profit of the driver is given as

P = \frac{2400}{x} - (48 + \frac{2x}{3}) $

to maximize the profit we have

\frac{dP}{dx} = 0

-\frac{2400}{x^2} + \frac{2}{3} = 0

so we have

x = 60 mph

8 0
3 years ago
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