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3 years ago

The energy of a photon is 9.7eV what is the wavelength

Physics

1 answer:

grandymaker [24]3 years ago

4 0

Answer:

Wavelength is 0.1278193 mm.

Explanation:

E (photon energy) = h (Planck constant) times c (speed of light in vacuum) divided by λ (photon's wavelength)

h and λ are constants so photon energy E changes in inverse relation to wavelength λ.

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A car has an initial velocity of 0m/s. It accelerates at a rate of 5m/s2 and travels 30m. What is the final velocity?

Eduardwww [97]

Answer:

2.5m/s1

Explanation:

8 0

2 years ago

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3) venus and earth are nearly the same size and distance from the sun. what are the main differences in the geology of the two p

MissTica

Venus has a surrounding that is approximately one hundred instances thicker than Earth's and has surface temperatures that are extraordinarily hot. Venus no longer has life or water oceans as Earth does.

Venus additionally rotates backward in comparison to Earth and the alternative planets. The geology of Earth is dominated by plate tectonics, Venus has "blob tectonics," wherein the growing of hot material from inside performs a dominant position in sculpting its surface. Venus is also one-of-a-kind from Earth in having miles decrease stage of erosion, because no precipitation and surface wind speeds are very low.

Venus is often called "Earth's dual" because they're similar in size and structure, but Venus has severe floor heat and a dense, poisonous environment. If the sun have been as tall as a typical front door, Earth and Venus could never be about the scale of a nickel.

Learn more about planets here:-brainly.com/question/1286910

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8 0

1 year ago

11. Block A and block B move toward each other on a level frictionless track. Block A has mass m and

Sindrei [870]

Answer:

The correct option is;

d) F, because the net force is equal to the mutual contact force between the blocks

Explanation:

The given information are

The mass of block A = m

The velocity of block A = +v

The mass of block B = 2·m

The velocity of block B = -v

Given that the two blocks collide, we have;

Initial total momentum = m × v + 2·m×(-v) = m·(v - 2·v) = -m·v

Final total momentum = m × v₁ + 2·m×v₂ = m·(v₁ + 2·v₂)

From the law of conservation of linear momentum, we have;

m·(v₁ + 2·v₂) = -m·v

v₁ + 2·v₂ = -v

Therefore, the resultant velocity of the two blocks is -v, and the direction of the block A is reversed and the resultant inertia is equivalent to the inertia of block A

Therefore;

The force exerted on block B = The force exerted on block A = The rate of change of momentum experienced by the two blocks = The mutual contact force experienced between the blocks.

5 0

3 years ago

ustapha Jones is speeding on the interstate in his Ferrari at 231km/hr when he passes a police car at rest . If the cop accelera

Lena [83]

Answer:

461 km/h

Explanation:

In order to solve this problem we must first sketch a drawing of what the situation looks like so we can better visualize it. (See attached picture).

We have two situations there, the first one is Mustapha's car that is traveling at a constant speed of 231km/hr.

The second situation is the police that is accelerating from rest until he reaches Mustapha. (We are going to suppose the acceleration is constant and that he will not stop accelerating until he reaches Mustapha). He has an acceleration of 15m/ $s^{2}$ .

We want to find what the final velocity of the police is at the time he reaches Mustapha. From this we can imply that the displacement x will be the same for both particles.

So let's model the first situation.

The displacement of Mustapha can be found by using the following equation:

$V_{M}=\frac{x}{t}$

when solving the equation for the displacement x we get that it will be:

$x=V_{M}t$

Now let's model the displacement of the cop. Since the cop has a constant acceleration, we can model his displacement with the following formula.

$x=V_{0}t+\frac{1}{2}at^{2}$

Since the initial velocity of the cop is zero, we can get rid of that part of the equation leaving us with:

$x=\frac{1}{2}at^{2}$

We can now set both equations equal to each other so we get:

$\frac{1}{2}at^{2}=V_{M}t$

When solving this for t, we get that:

$t=\frac{2V_{M}}{a}$ (let's call this equation 1)

Now, we know the cop has constant acceleration, so we can model it with the following formula too:

$a=\frac{V_{f}-V_{0}}{t}$

since the initial velocity of the cop is zero, we can get rid of that here too, so we get the following formula:

$a=\frac{V_{f}}{t}$

when solving for the final velocity, we get that:

$V_{f}=at$ (let's call this equation 2)

when substituting equation 1 into equation 2 we get:

$V_{f}=a(\frac{2V_{M}}{a})$

we can now cancel a leaving us with:

$V_{f}=2V_{M}$

This tells us that the final velocity of the cop will not depend on his acceleration. (This is only if the acceleration is constant all the time) So we get that the final velocity of the cop is:

$V_{f}=2(231km/hr)$

$V_{f}=461km/hr$

which is our answer.

8 0

3 years ago

ILL RATE YOU A 5, THANK YOU, AND MARK YOU AS BRAINLIEST! HURRY!

andreyandreev [35.5K]

Answer:

The offspring is homozygous for eye color.

Explanation:

Brown eyes is the shared allele of both parents (meaning homozygous) and an allele for hair type was not inherited from only one parents but from both however will recieve the dominant trait. (This is my best guess; I haven't studied this in awhile though)

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3 years ago

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