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SOVA2 [1]
3 years ago
15

What is tan(61)? А. 1.80 B. 0.49 C. 0.61 D. 0.87

Physics
1 answer:
pav-90 [236]3 years ago
7 0

Answer:

The answer of tan(61) is:

A= 1.80

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You illuminate a slit with a width of 0.0549 mm with a light of wavelength 735 nm and observe the resulting diffraction pattern
spayn [35]

Answer:

Explanation:

Given

slit width d=0.0549\ mm

wavelength of light \lambda =735\ nm

Screen is placed at a distance of D=2.85\ m

The angle for the first minima is given by

\sin \theta _1=\frac{m\lambda }{d}

for m=1

\sin \theta _1=\frac{1\times 735\times 10^{-9}}{0.0549\times 10^{-3}}

\sin \theta _1=0.0133

and one half of central maxima is given by

Y=D\sin \theta _1

Y=2.85\times 0.0133

Y=0.0381\ m

Width of central maxima =2Y

Width=0.0762\ m\approx 7.62\ cm                                

8 0
4 years ago
Which of the following statements is false?
vladimir1956 [14]

An excited atom can return to its ground state by absorbing electromagnetic radiation is false about the electromagnetic radiation.

Option B

<u>Explanation</u>:

In the scope of modern quantum theory, the term Electromagnetic radiation is identified as the movement of photons through space. Almost all the sources of energy that we utilize today such as coal, oil, etc are a product of electromagnetic radiation which was absorbed from the sun millions of years ago.

Various properties of electromagnetic radiations are a directly proportional relationship between the energy and the frequency, Inverse proportionality between frequency and the wavelength, etc. Hence, we can conclude that an "excited atom" can never return to its ground state by assimilating electromagnetic radiation and the 2nd statement is false.

4 0
3 years ago
What is the net work on the block?
Strike441 [17]

Answer:

A block device is a computer data storage device that supports reading and (optionally) writing data in fixed-size blocks, sectors, or clusters. These blocks are generally 512 bytes or a multiple thereof in size

8 0
3 years ago
Using F=ma, explain why a train is more difficult to start moving and more difficult to bring to a stop than an average sized ca
seropon [69]

Answer:

M_Train>> m_car    a_train <a_car

Explanation:

To start the movement of the train or the car, the motorcycle applies a force on the wheels, which starts the acceleration in the case of the train, it has a much greater mass than that of the car, for which to obtain the same acceleration necessary a much greater force

         a = F / m

as the mass of the train is greater than that of the car.

         a_train <a_car

Something similar happens when the vehicles stop, the engine stops applying force forward and the brakes apply a force backward that creates a negative acceleration that slows down, again as the mass of the train is much greater than the of the car its negative acceleration is much less.

   

It is good to clarify that to compensate for this the trains have a braking system on all wheels

6 0
3 years ago
Which of the following questions could best be answered by the work of Christian Doppler?
Nina [5.8K]
The answer is B
How quickly are the stars in the Milky Way moving away from Earth
8 0
3 years ago
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