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kompoz [17]
3 years ago
7

Which atmospheric layer prevents meteoroids from reaching earth’s surface

Physics
1 answer:
Natalija [7]3 years ago
5 0
Stratosphere because the atmosphere get denser
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A car has a mass of 8000 kg and a kinetic energy of 24,000 J. What is its<br> speed?
Liula [17]

Answer:

30 mph

Explanation:

8 0
3 years ago
A 2 eV electron encounters a barrier 5.0 eV high and width a. What is the probability b) 0.5 that it will tunnel through the bar
denis23 [38]

Answer:

The tunnel probability for 0.5 nm and 1.00 nm are  5.45\times10^{-4} and 7.74\times10^{-8} respectively.

Explanation:

Given that,

Energy E = 2 eV

Barrier V₀= 5.0 eV

Width = 1.00 nm

We need to calculate the value of \beta

Using formula of \beta

\beta=\sqrt{\dfrac{2m}{\dfrac{h}{2\pi}}(v_{0}-E)}

Put the value into the formula

\beta = \sqrt{\dfrac{2\times9.1\times10^{-31}}{(1.055\times10^{-34})^2}(5.0-2)\times1.6\times10^{-19}}

\beta=8.86\times10^{9}

(a). We need to calculate the tunnel probability for width 0.5 nm

Using formula of tunnel barrier

T=\dfrac{16E(V_{0}-E)}{V_{0}^2}e^{-2\beta a}

Put the value into the formula

T=\dfrac{16\times 2(5.0-2.0)}{5.0^2}e^{-2\times8.86\times10^{9}\times0.5\times10^{-9}}

T=5.45\times10^{-4}

(b). We need to calculate the tunnel probability for width 1.00 nm

T=\dfrac{16\times 2(5.0-2.0)}{5.0^2}e^{-2\times8.86\times10^{9}\times1.00\times10^{-9}}

T=7.74\times10^{-8}

Hence, The tunnel probability for 0.5 nm and 1.00 nm are  5.45\times10^{-4} and 7.74\times10^{-8} respectively.

6 0
3 years ago
Which type of wave can travel without a medium
Norma-Jean [14]
Electromagnetic waves can travel not only through air and solid materials, but also through the vacuum of space.
7 0
3 years ago
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What are the units for the spring constant, k?
Mnenie [13.5K]

C. newtons/meter

Explanation:

The unit of spring constant K is newtons/meter.

The spring constant is also known as the stiffness.

    F = k e

F is the force

k is the spring constant

e is the extension.

 The unit of F is newtons

                    e is meters

Therefore, k becomes newtons/meter

  • Stiffness is the resistance to stretch of a body.

learn more:

Force brainly.com/question/3820012

#learnwithBrainly

4 0
4 years ago
How can you double the acceleration of an object if you cannot alter the object’s mass?
Lyrx [107]

Answer:

If you double the force, you double the acceleration, but if you double the mass, you cut the acceleration in half.

Explanation:

7 0
3 years ago
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