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
ICE Princess25 [194]
3 years ago
10

An ultrasound wave vibrates 30,000 times per second. what is the frequency

Physics
1 answer:
erica [24]3 years ago
5 0
Frequency is given in units of Hertz (Hz) and is defined as the number of cycles per second.  The sound wave has 30,000 cycles per second, so its frequency is 30,000Hz.
This is more conveniently expressed as 30kHz, where the k indicates a multiplier of 1,000.
You might be interested in
An athlete is working out in the weight room. He steadily holds 50 kilograms above his head for 10 seconds. Which statement is t
postnew [5]

Answer:

A. The athlete isn’t doing any work because he doesn’t move the weight.

Explanation:

We must remember the definition of work, which says that work is equal to the product of mass by the distance displaced. In this case, the athlete only does work when he lifts the weight from the ground to the point where he holds the weight suspended.

So when he's holding the weight, he doesn't do any work.

3 0
3 years ago
Compare and contrast the general characteristics of a gas giant planet and one of the inner planets (such as Mercury, Earth, Ven
yKpoI14uk [10]
The gas planets usually have extremely high gravitational pulls, the surface isn't solid (since its a gas planet), and gas planets are larger than the inner planets. 
<span>Similarities- These planets all have moons and they both revolve around the sun (obviously).


Hope this helps.</span>
6 0
3 years ago
What force cause the rod to become charged
gtnhenbr [62]

Answer:

electricity

If a rod is charged it is because of the electrical force acting on it

6 0
3 years ago
a projectile is launched at an angle of 30 degrees and lands later at the same level. if it's initial speed is 50 m/s, solve for
Mrrafil [7]
using \: the \: formula \\ t = \frac{2u \sin( \alpha ) }{g} where \: u = initial \: speed \: \\ \alpha = angle \: of \: projection \\ g = acceleration \: due \: to \: gravity \\ \frac{2 \times 50 \times \sin(30) }{10} \\ \frac{100 \times 0.5}{10} = \frac{50}{10} = 5seconds

Maximum height
= (Usinα)^2/2g
(50*0.5)^2/20
25^2/20
625/20
=31.25metres
horizontal distance = Range= [U^2 * sin2α]/g
[50^2 * sin60]/10
2500 * 0.8660/10
2165/10=216.5metres
3 0
3 years ago
What is the wavelength of an AM radio wave in a vacuum if its frequency is 810 kHz?
dalvyx [7]
Answer- 370.114 meters
6 0
2 years ago
Other questions:
  • Consider an object moving in the plane whose location at time t seconds is given by the parametric equations: x(t)=5cos(πt) y(t)
    7·1 answer
  • One form of energy can be _____ another type of energy.
    7·1 answer
  • A material that water is not able to move through?
    5·2 answers
  • A parallel plate capacitor is charged up by a battery. The battery is then disconnected, but the charge remains on the plates. T
    9·1 answer
  • Which form of energy does a plant store when light is transformed during photosynthesis
    15·1 answer
  • A man standing in front of a mountain beats a drum at regular intervals. The rate of drumming is generally increased and he find
    10·1 answer
  • Which describes a virus?
    10·1 answer
  • As the velocity of the sound source approaches the speed of sound, the wave fronts ahead of the object begin to appear as:
    5·1 answer
  • ANSWER FAST PLEASE!
    8·1 answer
  • A ball is dropped off a building and falls past a window that is 2.2m long. If it takes .28s for the ball to cross the window wh
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!