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4 years ago

Cold plasma used in TVs is different from the solar plasma because ___________.

Physics

1 answer:

Arisa [49]4 years ago

5 0

Answer: B i believe

Explanation:

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tiny-mole [99]

Answer:

Red = 126 - 57 = 69 in positive direction

Blue = Red + 12 = 81 mph

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3 years ago

If potential energy at point A is 12 joules, what is the potential energy at D?

Irina-Kira [14]

Answer:

In D: 3J

Explanation:

Potential energy: Ep=mgh where m is the mass, h altitude.

In point A: h=20cm=0.2m

Epa=12=0.2×mg. Thus mg=12/0.2=60N

For point D: hd=5cm=0.05m

Epd=mg×0.05=60×0.05=3J

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3 years ago

Sound waves cannot travel in a vacuum because A) there is no medium for the sound waves to travel through. B) sound waves move t

nirvana33 [79]

The aswer is A. Hope I helped! :D

7 0

3 years ago

Read 2 more answers

An astronomer observes electromagnetic waves emitted by oxygen atoms in a distant galaxy that have a frequency of 5.710 × 10^14

Dmitry_Shevchenko [17]

Answer:

$v = 6.72 \times 10^6 m/s$

Explanation:

As we know by the doppler's effect of light that when source moves with respect to stationary observer then the frequency of light received is different from its actual frequency

the relative change in the frequency of light is given by the formula

$\frac{\Delta \nu}{\nu} = \frac{v}{c}$

here we know that

$\Delta \nu = 5.841 \times 10^{14} - 5.710\times 10^14$

$\Delta \nu = 1.31 \times 10^{13} Hz$

now we have

$\frac{1.31 \times 10^{13}}{5.841 \times 10^{14}} = \frac{v}{2.9979 \times 10^8}$

$v = 6.72 \times 10^6 m/s$

5 0

3 years ago

Gravitational Potential Energy: You and your friend, who weighs the same as you, want to go to the top of the Eiffel Tower. Your

ololo11 [35]

Answer:

Gravitational Potential Energy of both will be equal

Explanation:

The gravitational potential energy is given by the following formula:

$P.E = mgh$

where,

P.E = Gravitational Potential Energy

m = mass of object

g = acceleration due to gravity

h = height of object

Therefore, the gravitational potential energy of an object depends only upon the height of the object and its mass.

Since, both masses and the heights achieved by both people is equal. <u>Therefore, their gravitational potential energies will also be equal</u>

7 0

3 years ago