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Nutka1998 [239]
3 years ago
15

Find the wavelength of a photon which has 500.0 eV of energy.

Physics
1 answer:
jekas [21]3 years ago
5 0

Answer:

2.5 x 10⁻⁹ m

Explanation:

E = Energy of photon = 500 eV = 500 x 1.6 x 10⁻¹⁹ J

c = speed of photon = 3 x 10⁸ m/s

λ = wavelength of photon = ?

Energy of photon is given as

E = \frac{hc}{\lambda }

inserting the values

500\times 1.6\times 10^{-19} = \frac{(6.63\times 10^{-34})(3\times 10^{8})}{\lambda }

λ = 2.5 x 10⁻⁹ m

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A semicircular plate with radius 6 m is submerged vertically in water so that the top is 2 m above the surface. Express the hydr
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Answer: 313920

Explanation:First, we’re going to assume that the top of the circular plate surface is 2 meters under the water. Next, we will set up the axis system so that the origin of the axis system is at the center of the plate.

Finally, we will again split up the plate into n horizontal strips each of width Δy and we’ll choose a point y∗ from each strip. Attached to this is a sketch of the set up.

The water’s surface is shown at the top of the sketch. Below the water’s surface is the circular plate and a standard xy-axis system is superimposed on the circle with the center of the circle at the origin of the axis system. It is shown that the distance from the water’s surface and the top of the plate is 6 meters and the distance from the water’s surface to the x-axis (and hence the center of the plate) is 8 meters.

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di = 8 − yi

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The area of each strip is,

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5 0
3 years ago
A solid cylinder has a diameter of 17.4 mm and a length of 50.3mm. It's mass is 49g . What is its density of the cylinder in met
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Answer:

4 tonne/m³

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Rounding to one significant figure, the density is 4 tonne/m³.

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A ball is traveling 24° above the horizontal at a speed of 12 m/s. What is the vertical component of its speed?
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Answer:

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Explanation:

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A cyclist and his bicycle have a combined mass of 88 kg and a combined
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