1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
kolezko [41]
3 years ago
10

Why don't we use x-ray to communicate information?

Physics
1 answer:
Debora [2.8K]3 years ago
4 0

Answer: The difficulty comes in the modulation, and in the fact that X-rays can't be transmitted via wires or fiber.

Explanation: Mark me as brainlisti

You might be interested in
A rock is dropped from a 110-m-high cliff. How long does it take to fall (a) the first 55.0 m and (b) the second 55.0 m?
Genrish500 [490]

Answer:

a) t = 3.35[s]; b) t = 1.386[s]

Explanation:

We can solve this problem by dividing it into two parts, for the first 55 [m] and then the second part with the remaining 55 [m].

We will take the initial velocity as zero, as the problem does not mention that the Rock was thrown at initial velocity.

And using kinematics equations:

v_{f}^{2}= v_{o}^{2}+2*g*y\\where:\\v_{o}=0\\g=gravity = 9.81[m/s^2]\\y=55 [m]\\v_{f}^{2}=0+2*9.81*55\\v_{f}=\sqrt{2*9.81*55} \\v_{f}=32.85[m/s]

Now we can calculate the time:

v_{f}=v_{o}+g*t\\t=\frac{v_{f}-v_{o}}{g}\\ t=\frac{32.85-0}{9.81}\\ t=3.35[s]

Now we can calculate the second time, but using as a initial velocity 32.85[m/s].

The final velocity will be:

v_{f}^{2}= v_{o}^{2}+2*g*y\\v_{f}=\sqrt{v_{o}^{2}+2*g*y} \\v_{f}=\sqrt{32.85^{2}+2*9.81*55 } \\v_{f}=46.45[m/s]

Now we can calculate the second time:

t=\frac{46.45-32.85}{9.81} \\t= 1.386[s]

Note: The reason the second time is shorter even though it is the same distance is that the acceleration of gravity increases the speed of the rock more and more as it falls.

7 0
3 years ago
Miss Hu taught her class what makes night and day on Earth. She could not use the real Sun. She used a light bulb instead. In th
kherson [118]

B. model; it is the model of the sun

5 0
3 years ago
Read 2 more answers
Use the impulse-momentum theorem to find how long a stone falling straight down takes to increase its speed from 5.6 m/s to 10.6
Nezavi [6.7K]

As stated, the impulse and momentum definitions will be used to later find the value of time through the force of gravity. According to the theory, the impulse formula is given as,

I = F\Delta t

Here,

F = Force

\Delta t = Change in time

Now using the impulse theorem we have that,

Change in Impulse = Change in momentum

F\Delta t = \Delta p (1)

The change in momentum is given as

\Delta p = p_f -p_i

\Delta p = (-10.6)-(-5.6)

\Delta p = -5m/s

The force due to gravity is through the Newton's second law

F_g = -mg

Here,

m = mass

g = Acceleration due to gravity

Substitute the value in (1)

-mgt = -5m/s

9.8t = 4.9

t = \frac{5}{9.8}

t = 0.51s

Therefore it will take 0.51s.

7 0
3 years ago
Four bicyclists travel different distances and times along a straight path. Which cyclist traveled with the greatest average
riadik2000 [5.3K]

Answer:

The cyclist with the greatest average speed is Cyclist 4 with average speed of 4.5 m/s

Explanation:

Given;

Cyclist 1 travels 9 m    in    27 s

Cyclist 2 travels 87 m  in    22 s

Cyclist 3 travels 106 m  in   26 s

Cyclist 4 travels 108 m   in   24 s

Determine the average speed of the cyclists as follows;

Average speed of Cyclist 1:    v =  9/27  = 0.33 m/s

Average speed of Cyclist 2:    v = 87/22 = 3.96 m/s

Average speed of Cyclist 3:    v =   106/26 = 4.08 m/s

Average speed of Cyclist 4:     v =   108/24 = 4.5 m/s

Therefore, the cyclist with the greatest average speed is Cyclist 4 with average speed of 4.5 m/s

6 0
4 years ago
I need help on a physics problem!! Please help
Ksivusya [100]
What you need help with?
5 0
4 years ago
Other questions:
  • If the sun were to suddenly stop providing energy to earth, what would happen to Earth and its inhabitants?
    7·1 answer
  • If the magnitude of the electric field at a distance of 7.8 cm from the center is 30500 n/c , what is the magnitude of the elect
    13·1 answer
  • [C]utting programs that were not effective or essential and even some that were, but are now unaffordable; and precisely targeti
    10·2 answers
  • A swimmer enters a gloomier world (in one sense) on diving to greater depths. Given that the mean molar absorption coeffi cient
    14·1 answer
  • Rays of light strike a bumpy road and are reflected.
    9·2 answers
  • A hungry 11.5 kg predator fish is coasting from west to east at 75.0 cm/s when it suddenly swallows a 1.25 kg fish swimming from
    11·1 answer
  • If there is gravity where the International Space Station (ISS) is located above Earth, why doesn’t the space station get pulled
    12·1 answer
  • Which two actions would weaken an electromagnet?
    12·1 answer
  • A guitar string is supposed to have a fundamental frequency 256 Hz. It currently has a fundamental frequency 248 Hz when the str
    6·1 answer
  • A device that detects small current differences and prevents electrocution that is often required as a safety measure for bathro
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!