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
FromTheMoon [43]
3 years ago
7

Two loudspeakers 42.0 m apart and facing each other emit identical 115 Hz sinusoidal sound waves in a room where the sound speed

is 345 m/s. Susan is walking along a line between the speakers. As she walks, she finds herself moving through loud and quiet spots. ?

Physics
1 answer:
Tems11 [23]3 years ago
3 0

Answer:

She passes through a loud spot at x = 19.5m from the first speaker. Constructive interference occurs here.

At the quiet spot destructive interference occurs. The minimum distance for this to occur is 20.25 from the first speaker.

Explanation:

You might be interested in
Point X is midway between the charges. In what section of the line will there be a point where the resultant electric field is z
Fiesta28 [93]

Answer:

I believe the answer is in fact section (VW) on the line where the electric field result will be zero.

Explanation:

The direction of the electric field due to a positive charge is away from it and the direction of the electric field due to a negative one is towards it.

3 0
3 years ago
I NEED HELP WITH THE LAST QUESTION ASAP D':
VMariaS [17]
Where’s the question page at??
6 0
3 years ago
A rock is thrown from the top of a 20-m building at an angle of 53° above the horizontal. If the horizontal range of the throw
NemiM [27]

Answer:

28.5 m/s

18.22 m/s

Explanation:

h = 20 m, R = 20 m, theta = 53 degree

Let the speed of throwing is u and the speed with which it strikes the ground is v.

Horizontal distance, R = horizontal velocity x time

Let t be the time taken

20 = u Cos 53 x t

u t = 20/0.6 = 33.33 ..... (1)

Now use second equation of motion in vertical direction

h = u Sin 53 t - 1/2 g t^2

20 = 33.33 x 0.8 - 4.9 t^2     (ut = 33.33 from equation 1)

t = 1.17 s

Put in equation (1)

u = 33.33 / 1.17 = 28.5 m/s

Let v be the velocity just before striking the ground

vx = u Cos 53 = 28.5 x 0.6 = 17.15 m/s

vy = uSin 53 - 9.8 x 1.17

vy = 28.5 x 0.8 - 16.66

vy = 6.14 m/s

v^2 = vx^2 + vy^2 = 17.15^2 + 6.14^2

v = 18.22 m/s

6 0
3 years ago
When water change into ice it contracts or expand<br> plz answer fast..
mihalych1998 [28]

Answer:Yes, water indeed expands when it changes form from liquid to solid. And this is because water has a property called “hydrogen bonds”, and these bonds occur between each water molecule. But when water is in a liquid form these hydrogen bonds break more easily and occur less frequently. When the temperature drops the kinetic energy also drops, which in turn makes hydrogen bonds form more frequently. So the water molecules form a lattice, which is less dense than regular liquid water.

Explanation:

4 0
3 years ago
Read 2 more answers
Based on the diagram which of the following statements is true of a helium atom
snow_lady [41]

Answer: Option 2

Explanation:

Option 1 is wrong because there are 2 protons and 2 neutrons in nucleus.

Option 3 is wrong because there are two electrons moving around nucleus.

Option 4 is wrong because electrons are negatively charged and are moving around the nucleus.

Option 5 is wrong because there equal amount of protons and electrons with 2 each.

8 0
3 years ago
Other questions:
  • Explain the advantages and disadvantages of using concentric circles in describing the solar system to an elementary school chil
    9·1 answer
  • A student decides they need a cup of coffee. The energy lost as the coffee cools down is _____ the energy gained by the surround
    5·2 answers
  • The age of the solar system is closest to _____ years old.
    5·1 answer
  • A 4.0-kg mass is moving with speed 2.0 m/s. A 1.0-kg mass is moving with speed 4.0 m/s. Both objects encounter the same constant
    8·1 answer
  • A concave lens is used to form an image. The diagram shows three incident rays that pass the object and then reach the lens. How
    13·2 answers
  • A skiy diver, with parachute unopened, falls 625 m in 15.0s.
    13·1 answer
  • A spring scale can be used on
    10·2 answers
  • The point during heat transfer at which both materials or objects are the same temperature.
    11·1 answer
  • Can I have an anime weirdo friend that's a girl pwease cuz guys are mean and don't understand. I'm a 16 yo guy​
    9·2 answers
  • When frequency is increased what happens to the amplitude?
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!