Why do we say that a baseball falls toward Earth, and not Earth toward the baseball?

1 answer:

4 0

Probably because the earth is stationary rotating on its axis whereas the baseball is the one doing all of the movement after being thrown

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When light falls on objects, it interacts with them in different ways as shown in the images. What type of interaction is seen i

agasfer [191]

Answers with explanation

Transmission

If all the light passes through a medium without any absorption then transmittance is 100%.

Refraction

Refraction is the bending of a wave when it enters a medium where its speed is different and rays are again refracted when they leave that medium,

Reflection

Reflected rays don't pass through the medium instead rays bounces off an object at an angle.

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3 years ago

The Event Horizon Telescope needs a 22 micro-arcsecond resolution to view the event horizon regions around black holes. If the a

likoan [24]

Answer:

14869817.395 m

Explanation:

$\theta$ =22 microarcsecond

λ = Wavelength = 1.3 mm

Converting to radians we get

$22\times 10^{-6}\frac{\pi}{180\times 3600}\ radians$

From Rayleigh Criterion

$\theta=1.22\frac{\lambda}{D}\\\Rightarrow D=1.22\frac{\lambda}{\theta}\\\Rightarrow D=1.22\frac{1.3\times 10^{-3}}{22\times 10^{-6}\frac{\pi}{180\times 3600}}\\\Rightarrow D=14869817.395\ m$

Diameter of the effective primary objective is 14869817.395 m

It is not possible to build one telescope with a diameter of 14869817.395 m. But, we need this type of telescope. So, astronomers use an array of radio telescopes to achieve a virtual diameter in order to observe objects that are the size of supermassive black hole's event horizon.

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3 years ago

________ in the ear change sound waves to electrical signals that the brain can interpret as sounds

Assoli18 [71]

Answer:

ear

Explanation:

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2 years ago

What is the total amount of heat in a substance

Setler [38]

The specific heat capacity of a substance is the amount of energy needed to change the temperature of 1 kg of the substance by 1 degree Celsius.