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
irinina [24]
4 years ago
9

Cell phone conversations are transmitted by high-frequency radio waves. Suppose the signal has wavelength 36.5 cm while travelin

g through air. What is the frequency as the signal travels through 3-mm-thick window glass into your room?
Physics
1 answer:
tia_tia [17]4 years ago
7 0

Answer:

f=8.219*10^{8}Hz

Explanation:

We are going to use the formula  v=fλ

Where v= velocity of radio waves

f= frequency

λ= wavelength of wave

  • radio waves are electromagnetic waves and as such they have the speed of light which is 3*10^{8}m/s.
  • also when a wave travels from one medium to another, the wavelength changes while the frequency remains the same.
  • calculating for the frequency of the wave in air also gives us the frequency in the window glass.

f=\frac{v}{λ}

v=3*10^{8}m/s.

λ=36.5 cm = 36.5/100= 0.365m

f=\frac{3*10^{8}m/s.}{0.365m}

f=8.219*10^{8}Hz

You might be interested in
An nfl linebacker can go from 0 m/s to 2.5 m/s in 2.5s. What is his acceleration?
dybincka [34]

Answer:

a= 1 m/s^2

Explanation:

a= (Vf-Vi)/t

a=(2.5m/s - 0m/s)/2.5 s

a=2.5 m/s / 2.5 s

a= 1 m/s^2

5 0
3 years ago
Which of the following is the best name for a compound made from calcium and bromine? (CaBr2) calcium bromide calcium dibromide
8_murik_8 [283]

By definition, we have to:

Calcium Bromide is an inorganic salt formed by granular white crystals that responds to the formula CaBr2.

Calcium bromide has no odor, is colorless and has a bitter taste.

It is obtained by adding Hydrobromic Acid to Calcium Oxide, Calcium Carbonate or Calcium Hydroxide.

The substance that results is then subjected to a crystallization process, which involves evaporating the water.

From here, you get then:

CaBr2.

Answer:

CaBr2 = Calcium bromide.

6 0
3 years ago
Read 2 more answers
The frequency of a wave remains constant if the medium, temperature, and pressure do not change.
Shalnov [3]

Trueeeeeee

The frequency of a wave remains constant if the medium, temperature, and pressure do not change.

7 0
3 years ago
Read 2 more answers
An electron moves with velocity v⃗ =(5.9i−6.4j)×104m/s in a magnetic field B⃗ =(−0.63i+0.65j)T. Determine the z-component of the
HACTEHA [7]

Answer:

Explanation:

Force on the electron = q ( v x B )

q = - 1.6 x 10⁻¹⁹

v = (5.9i−6.4j)×10⁴

B = (−0.63i+0.65j)

v x B = (5.9i−6.4j)×10⁴  x (−0.63i+0.65j)

= (3.835  - 4.032 ) x 10⁴ k

= - 1970 k

Force on the electron = q ( v x B )

= - 1.6 x 10⁻¹⁹ x -1970 k

= 3.152 x 10⁻¹⁶ k

z-component of the force on the electron

Fz = 3.152 x 10⁻¹⁶ N  

7 0
3 years ago
A soccer player kicks a ball horizontally off a 40.0-m-high cliff into a pool of water. If the player hears the sound of the spl
JulijaS [17]

the speed of the ball before it reaches the pool of water would be 9.91 m/s.

8 0
3 years ago
Other questions:
  • Tire or false
    12·1 answer
  • Last question! Please help me. You don't have to give the answer, just tell me how to start the equation. BUT if you want to sha
    10·1 answer
  • Communications satellites are placed in a circular orbit where they stay directly over a fixed point on the equator as the earth
    8·2 answers
  • A car accelerates uniformly from rest to a speed of 23.7m/s in 6.5 seconds. Find the distance the
    6·1 answer
  • how does electrical current change when more devices are added to a series circuit? To a parallel circuit?
    6·1 answer
  • A 1540-kg truck has a wheel base of 3.13 m (this is the distance between the front and rear axles). The center of mass of the tr
    10·1 answer
  • Is light a particle or a wave? Is metal a good heat shield? Is the reason that nothing can go faster than light because we have
    15·1 answer
  • A butterfly rests on a leaf floating on the surface of a pond. The butterfly then starts moving to the tip of the leaf at a spee
    12·1 answer
  • Define one newton force...<br>No spam..​
    7·2 answers
  • The symbol or variable to used find initial velocity is
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!