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3 years ago

Why are satellites placed into orbit at least 150 km above Earth’s surface?

2 answers:

8 0

Because its just enough to where its not out f the gravitational pull and not close enough to be pulled back to earth. Hope it helps

Anna007 [38]3 years ago

7 0

It's TO AVOID AIR RESISTANCE on E2020. Hope I helped :)

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The resolution of a microscope describes the scale of the smallest detail that is clearly observable through the microscope. For

VikaD [51]

Answer:

Resolution = Wavelength = 252.101 nm

Explanation:

The relation between frequency and wavelength is shown below as:

$c=frequency\times Wavelength$

c is the speed of light having value $3\times 10^8\ m/s$

Given, Frequency = $1.19\times 10^{15}\ Hz$

Thus, Wavelength is:

$Wavelength=\frac{c}{Frequency}$

$Wavelength=\frac{3\times 10^8}{1.19\times 10^{15}}\ m$

$Wavelength=2.52101\times 10^{-7}\ m=252.101\times 10^{-9}\ m$

Also, 1 m = $10^{-9}$ nm

So,

Resolution = Wavelength = 252.101 nm

7 0

3 years ago

Using your knowledge of momentum explain why cars are designed to have crumple zones?

Molodets [167]

Answer: I think cars are designed to have crumble zone because lets say you're going 60-70 mph and you hit a brick wall that cant move, it would be a very hard jolt causing the beings inside to get thrown forward, but if it has a crumble zone it would slow the the jolt from is slowing down in the hit.

4 0

3 years ago

Calculate the mass of a gas with a density of 0.0065 g/cm3 and volume of 260 cm3

Anuta_ua [19.1K]

$\sf Density = \frac{mass}{volume }\\\\0.0065 = \frac{mass}{260} \\\\{\boxed {\sf {mass =1.69 ~grams}}$

6 0

3 years ago

Write an Hypothesis whether land or water heats faster

Hatshy [7]

Answer:

Land heats faster

Explanation:

Land heats faster because absorbs much more solar radiation.

5 0

3 years ago

What is sound wave and examples

Nezavi [6.7K]

★ « what is sound wave and examples » ★

A sound wave is the pattern of disturbance caused by the movement of energy traveling through a medium (such as air, water, or any other liquid or solid matter) as it propagates away from the source of the sound. The source is some object that causes a vibration, such as a ringing telephone, or a person's vocal chords.

hope it helps

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3 years ago