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
slamgirl [31]
3 years ago
7

A medical ultrasound imaging system sends out a steady stream of very short pulses. To simplify analysis, the reflection of one

pulse should be received before the next is transmitted.
If the system is being used to create an image of tissue 15 cm below the skin, what is the minimum time between pulses?

Also how many pulses per second does this correspond to?
Physics
1 answer:
arlik [135]3 years ago
5 0

Answer:

Minimum time = 1.95x10^-4 s

Number of pulses = 5128.21 pulses/s

Explanation:

We have the speed of sound waves through human tissue with a value of 1540 m/s, to calculate the time it takes for the pulse to travel a distance of 30 cm (since the pulse will first travel a distance of 15 cm and then it will return another 15 cm to be detected by the equipment), therefore, the time between the two pulses will be equal to:

tminimum = 0.30 m/1540 m/s = 1.95x10^-4 s

To calculate the number of pulses, one second must be divided over the minimum time between the two pulses, as follows:

npulses = 1 s/1.95x10^-4 s = 5128.21 pulses/s

You might be interested in
PLEASE HELP!!! WILL MARK THE BRAINLIEST! HIGH SCHOOL PHYSICAL SCIENCE List the independent, dependent, controlled variables of t
serious [3.7K]

Answer:

Explanation:

You didn't last any of the variables. You have to list the variables to tell which are which.

3 0
3 years ago
Read 2 more answers
Does the earths magnetic field change with time?
ZanzabumX [31]

Answer:

As per the fossil fuel records, magnetic field reversal does not impact living beings. It will take almost a century for the poles to complete the shift. Meanwhile, the earth is left with almost zero magnetic field.

6 0
3 years ago
How are problems best solved by scientists?
spin [16.1K]
One scientist proposes an idea and other scientists repeat his or her experiments so they can Accept the Idea.
3 0
3 years ago
Read 2 more answers
A woman launches a boat from one shore of a straight river and wants to land at the point directly on the opposite shore. If the
I am Lyosha [343]

Answer:

If she stands on the North side of a river flowing to the East at 5 mph,

she must head towards the SouthWest to arrive on the South side of the river directly across from her starting point and we have

x^2 + 5^2 = 10^2 where x is her speed directly across the river

x = (75)^1/2 = 8.66 mph towards the South

sin theta = 5 / 10 = 1/2

She must angle the boat at 30 deg from straight South

4 0
2 years ago
Select the correct answer.
r-ruslan [8.4K]

Answer:

That would be B. Hope this helps!

Explanation:

Orion's Belt or the Belt of Orion, also known as the Three Kings or Three Sisters, is an asterism in the constellation Orion. It consists of the three bright stars Alnitak, Alnilam and Mintaka. Looking for Orion's Belt in the night sky is the easiest way to locate Orion in the sky.

3 0
3 years ago
Read 2 more answers
Other questions:
  • A mover hoists a 50 kg box from the ground to a height of 2 m. What was the change in the box's energy
    11·1 answer
  • HELP PLEASE!<br>Can anyone help with any of these?
    12·1 answer
  • Which of the following is an example of the effect of a natural force ?
    13·2 answers
  • Which atomic model is missing from this set?
    6·1 answer
  • If a toy has a mass of 1 kg, it has an Earth weight of​
    14·1 answer
  • Un cuerpo gira con movimiento circular uniforme un ángulo total de 1080° en 20
    13·1 answer
  • When a compass needle settles down in a magnetic field, _______. the needle aligns itself with the field, the south end of the c
    8·1 answer
  • In which of the following situation is work being done?
    8·1 answer
  • Suppose the Moon rose at 6 p.m. yesterday. What are the approximate rising times and phase of the Moon today?
    14·1 answer
  • A 20 kg box rests on the ground. Round all answers to the hundredths, if necessary. What is the weight of the box?​
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!