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
Marta_Voda [28]
3 years ago
11

On a topographic map, contour lines create a group of concentric, closed loops. Which of the following features could this indic

ate?
a. a stream channelb. hilltopc. depressiond. a cliff
Physics
1 answer:
posledela3 years ago
3 0

Answer:

b. Hill top

Explanation:

On a topographic map, the closed circles are meant to represent a hill. So if the contour lines are creating a group of concentric closed loops then it must be an indication of a hill.

You might be interested in
What cause earthquakes?
KengaRu [80]
Question; what causes earthquakes? 
Answer; what causes earthquakes are mainly when rocks are underground and then suddenly break along a fault. 
6 0
3 years ago
Read 2 more answers
An experiment is set up to test the angular resolution of an optical device when red light (wavelength ????r ) shines on an aper
Neko [114]

Explanation:

As per Rayleigh criterion, the angular resolution is given as follows:

\theta=\frac{1.22 \lambda}{D}

From this expression larger the size of aperture, smaller will be the value of angular resolution and hence, better will be the device i.e. precision for distinguishing two points at very high angular difference is higher.

4 0
3 years ago
7.22 Ignoring reflection at the air–water boundary, if the amplitude of a 1 GHz incident wave in air is 20 V/m at the water surf
Serga [27]

Answer:

z = 0.8 (approx)

Explanation:

given,

Amplitude of 1 GHz incident wave in air = 20 V/m

Water has,

μr = 1

at 1 GHz, r = 80 and σ = 1 S/m.

depth of water when amplitude is down to  1 μV/m

Intrinsic impedance of air = 120 π  Ω

Intrinsic impedance of  water = \dfrac{120\pi}{\epsilon_r}

Using equation to solve the problem

  E(z) = E_0 e^{-\alpha\ z}

E(z) is the amplitude under water at z depth

E_o is the amplitude of wave on the surface of water

z is the depth under water

\alpha = \dfrac{\sigma}{2}\sqrt{\dfrac{(120\pi)^2}{\Epsilon_r}}

\alpha = \dfrac{1}{2}\sqrt{\dfrac{(120\pi)^2}{80}}

\alpha =21.07\ Np/m

now ,

  1 \times 10^{-6} = 20 e^{-21.07\times z}

  e^{21.07\times z}= 20\times 10^{6}

taking ln both side

21.07 x z = 16.81

z = 0.797

z = 0.8 (approx)

5 0
3 years ago
a wave in a rope is traveling at 6 m/s and at a frequency of 2 Hz. what is the wavelength of the wave producced
Tems11 [23]

Answer:

3

Explanation:

4 0
2 years ago
ANSWER ASAP
Hoochie [10]
The answer to this would inFact be A
6 0
2 years ago
Other questions:
  • A temperature of 34 fereheight is equal to blank kelvin
    5·2 answers
  • Sound will not travel through <br> A. A vacuum<br> B. Solids<br> C. Liquids <br> D. Gases
    5·1 answer
  • Most of the bright stars in our galaxy are located in the galactic
    6·1 answer
  • What type of friction prevents a pile of rocks from falling apart?
    13·1 answer
  • Moving a neutral wire in a(n) ____ field will induce a(n) _____.
    15·1 answer
  • During which type of change can an atom of carbon become an atom of nitrogen?
    9·2 answers
  • What does your slope stand for?​
    8·1 answer
  • How do you think the weight and the lift should not be one of the same magnitude​
    5·1 answer
  • Which statement is correct about waves?
    14·1 answer
  • A driver of a car traveling at 15.0 m/s applies the brakes, causing a uniform acceleration of -2.0 m/s² and a final velocity of
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!