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swat32
3 years ago
14

In what region of the electromagnetic spectrum is a photon found that possesses twice as much energy as one in the blue region (

442 nm) of the visible spectrum?
Physics
1 answer:
iren2701 [21]3 years ago
4 0
<span>The answer is: ultraviolet The energy (E) of a photon is directly proportional to its frequency f, by Planck's formula: E = hf, where h is Planck's constant (6.625 * 10**-34 joule-second). The frequency is inversely proportional to the wavelength w by: f = c/w, where c is the speed of light, 3.0 * 10**8 meters per second. Combine these formulas and we see that the energy is inversely proportional to the wavelength by: E = hc/w If the energy is inversely proportional to the wavelength, a photon with twice the energy has half the wavelength of our 442-nm. photon in this example. So its wavelength is 221 nm. which is in the ultraviolet range.</span>
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An attack helicopter is equipped with a 20- mm cannon that fires 88.7 g shells in the forward direction with a muzzle speed of 9
Svetradugi [14.3K]
The impulse imparted to the shells equals the change in the momentum:
Fav*(Delta t)= Delta m*v.
The mass change is
Delta m= n*m= (89.9shells)*(88.7g)=7.97Kg
So the average force is
F=((v)*(Delta m))/t= ((929)*(7.97))/4.84=1529.78 N
Since the velocity of the shells is much greater than the velocity of the helicopter, there is no need to use relative velocity.



4 0
3 years ago
If do 50 J of Work in 20 seconds, what is my Power ?
pochemuha

Answer: P= W/t so P=50/20 =2.5 W

8 0
2 years ago
A produce distributor uses 800 packing crates a month, which it purchases at a cost of $10 each. The manager has assigned an ann
strojnjashka [21]

Answer:

$364.29

Explanation:

given,

Packing of crates per month (u)= 800

annual carrying cost of 35 percent of the purchase price per crate.

Ordering cost(S) = $ 28

D = 800 x 12 = 9600 crates/year

H = 0.35 P

H = 0.35 x $10

H = $3.50/crate per yr.

Present Total cost

= \dfrac{800}{2}\times 3.50 + \dfrac{9600}{800}\times 28

= 1400 + 336

= $ 1,736

Q_0 = \sqrt{\dfrac{2DS}{H}}

Q_0 = \sqrt{\dfrac{2\times 9600 \times 28}{3.50}}

Q_0 =\$ 391.92

Total cost at EOQ

= \dfrac{391.92}{2}\times 3.50 + \dfrac{9600}{391.92}\times 28

= 685.86 + 685.85

= $ 1,371.71

the firm save annually in ordering and carrying costs by using the EOQ

    = $ 1,736 - $ 1,371.71

    = $364.29

4 0
3 years ago
An aircraft is moving horizontally with a speed of 50m/s, at the height of 2km, an object is dropped from the aircraft. What is
posledela

Explanation:

use the diagram^

horizontal velocity of the object nvr changes, it'll stay 50m/s till it hits the ground

initial vertical velocity = 0

to find the final vertical velocity, use the formula:

v {}^{2}  = u {}^{2}  + 2as

where u = 0m/s, a = 9.8m/s², and s = 2000m

solve for v.

for time taken to reach ground, use the formula:

v = u + at

where v = the value for v u calculated above, u = 0 m/s, a = 9.8m/s² and solve for t.

7 0
2 years ago
Two trains leave the same station at the same time. The first train travels north at 60 mph. The second train travels west at 45
Marizza181 [45]

Answer:

15 mph

Explanation:

Velocity = Distance/time

Distance, D = velocity * time

After 2 hours, the first train would have covered a distance of:

D1 = 60 * 2 = 120 miles

The second train would have covered a distance of:

D2 = 45 * 2 = 90

The difference in the distance covered by the two trains after 2 hours is:

ΔD = D1 - D2

ΔD = 120 -90

ΔD = 30 miles

The rate at which the distance is changing, Rate = ΔD/Δt

Rate = 30/2

Rate = 15 mph

8 0
3 years ago
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