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3 years ago

Radio waves can be sent directly through the earth.

1 answer:

8 0

Not true, because the radio waves are at the longest wavelengths, which means it carries one of the weakest energy levels, whereas gamma rays have the shortest but most powerful, able to pierce the bone and cause cancer within the marrow.

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• 500 waves pass by in 2 second. These waves have a wavelength of 6

tamaranim1 [39]

Answer:

6/2times500=1500

Explanation:

s = d/t which means speed equals distance divided by time.

7 0

3 years ago

What must be the distance (in meters) between a point charge q1 = 16 μC and a point charge q2 = 32 μC for the electrostatic forc

adoni [48]

Answer:

d = 0.71 meters

Explanation:

It is given that,

Charge 1, $q_1=16\ \mu C=16\times 10^{-6}\ C$

Charge 2, $q_2=32\ \mu C=32\times 10^{-6}\ C$

Electrostatic force between charges, F = 9 N

Let d is the distance between the charges. The electrostatic force between the charges is given by the product of charges and divided by square of distance between them. Mathematically, it is given by :

$F=k\dfrac{q_1q_2}{d^2}$

$d=\sqrt{\dfrac{kq_1q_2}{F}}$

$d=\sqrt{\dfrac{9\times 10^9\times 16\times 10^{-6}\times 32\times 10^{-6}}{9}}$

d = 0.71 meters

So, the distance between the charges is 0.71 meters. Hence, this is the required solution.

6 0

4 years ago

Can you explain why number 3 is correct?

lukranit [14]

No waves because Q19 waves would going at the surface at regions

7 0

3 years ago

What is a force?

yulyashka [42]

Answer:

A. push or pull

Explanation:

When you are applying force to an object, you can do so by pushing or pulling the object. Newtons first law applies to this. The object will stay at rest until a force is applied. The force can be pushing or pulling.

8 0

3 years ago

Read 2 more answers

I need help with both 3 and 4 please help?

sveticcg [70]

1.A
2.D
Hope this helps

4 0

3 years ago