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3 years ago

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An electromagnet wave has a wavelengths of 9.4E2 m which can also be written as 9.4X10^2 m. What is the frequency of this wave?

What type of wave is this?

1 answer:

ivanzaharov [21]3 years ago

3 0

Electromagnetic wave is that wave which doesn't need any medium to travel

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The cunninghams are moving across the country. Mr.cunningham leaves 2.5 hours before mrs.cunningham. If he averages 40 mph and s

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When she starts out, he is (40x2.5)= 100 miles ahead of her.

She gains (65-40)= 25 miles on him every hour.

It takes her (100/25)= 4 hours to catch up to him.

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Answer:

$40

Explanation:

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or

10 + 10 + 10 + 10 = 40

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When g=a, that means everything on earth fall at the same rate.

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Paul [167]

Explanation:

Given that,

Weight of water = 25 kg

Temperature = 23°C

Weight of mass = 32 kg

Distance = 5 m

(a). We need to calculate the amount of work done on the water

Using formula of work done

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$W=32\times9.8\times5$

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The amount of work done on the water is 1568 J.

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Using formula of internal energy

The change in internal energy of the water equal to the amount of the work done on the water.

$\Delta U=W$

$\Delta U=1568\ J$

The change in internal energy is 1568 J.

(c). We need to calculate the final temperature of the water

Using formula of the change internal energy

$\Delta U=mc_{p}\Delta T$

$\Delta U=mc_{p}(T_{2}-T_{1})$

$T_{2}=T_{1}+\dfrac{\Delta U}{mc_{p}}$

$T_{2}=23+\dfrac{1568}{25\times4.18\times10^{3}}$

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