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
RUDIKE [14]
3 years ago
12

A child is swinging back and forth with a constant period and amplitude. Somewhere in front of the child, a stationary horn is e

mitting a constant tone of frequency fs Five points are labeled in the drawing to indicate positions along the arc as the child swings. At which position(s) will the child hear the lowest frequency for the sound from the whistle?
Physics
1 answer:
Amanda [17]3 years ago
3 0

Answer:

Explanation:

  We shall apply concept of Doppler's effect of apparent frequency to this problem . Here observer is moving sometimes towards and sometimes away from the source . When observer moves towards the source , apparent frequency is more than real frequency and when the observer moves away from the source , apparent frequency is less than real frequency . The apparent frequency depends upon velocity of observer . The formula for apparent frequency when observer is going away is as follows .

f = f₀ ( V - v₀ ) / V , f is apparent , f₀ is real frequency , V is velocity of sound and v is velocity of observer .

f will be lowest when v₀ is highest .

velocity of observer is highest when he is at the equilibrium position or at middle point .

So apparent frequency is lowest when observer is at the middle point and going away from the source  while swinging to and from before the source of sound .

You might be interested in
Molecules rearrange and form new molecules reversible
STALIN [3.7K]
1. <span>Molecules rearrange and form new molecules - exchange (they exchange some material in order to produce new things)
2. </span><span>simultaneous decomposition and synthesis - reversible (it can go back)
3. </span><span>bonds broken and elements released - decomposition
4. </span><span>molecules formed from components - synthesis (these components merge and create molecules)</span>
6 0
3 years ago
Read 2 more answers
Determine the average speed of a runner who runs 15 Km in one hour and 30 minutes
igor_vitrenko [27]
V=d/t
v=15/90
v=0.16 km/min
7 0
2 years ago
An elevator car weighs 5500 N. If the car accelerates upwards at a rate of 4.0 m/s2, what is the tension in the support cable li
nadya68 [22]

Answer:

Explanation:

The equation for this, since we are talking about weight on an elevator, is Newton's 2nd Law adjusted to fit our needs:

F_n=ma+w where the Normal Force needed to lift that elevator car is the tension. So the equation then becomes

T = ma + w where T is the tension in the cable to lift the elevator, m is the mass of the elevator (which we have to solve for), a is the acceleration of the elevator (positive since it's going up), and w is the weight of the elevator (which we have as 5500 N). Solving first for mass:

w = mg and

5500 =- m(10) so

m = 550 kg. Now we have what we need to solve for the tension:

T = 550(4.0) + 5500 and

T = 2200 + 5500 so

T = 7700 N

4 0
3 years ago
If you can throw a stone straight up to height h, what’s the maximum horizontal distance you could throw it over level ground?
Mariana [72]
To answer this question, first we take note that the maximum height that can be reached by an object thrown straight up at a certain speed is calculated through the equation,
                            Hmax = v²sin²θ/2g
where v is the velocity, θ is the angle (in this case, 90°) and g is the gravitational constant. Since all are known except for v, we can then solve for v whichi s the initial velocity of the projectile. 

Once we have the value of v, we multiply this by the total time traveled by the projectile to solve for the value of the range (that is the total horizontal distance). 
8 0
3 years ago
Read 2 more answers
Atoms of two different elements must have different
sergejj [24]

Explanation:

C. Atomic numbers....

4 0
3 years ago
Other questions:
  • What is the relationship between the internal energy of a substance and its state of matter? A) As a gas loses internal energy i
    11·2 answers
  • A car travels a distance of 320 km in 4 hours. What is your average speed in meters per second?
    8·1 answer
  • One safety precaution that you would take when carrying out experiments using resistance wires
    7·1 answer
  • What would decrease the resistance of wires carrying an electric current
    15·2 answers
  • A cylinder of mass 14.0 kg rolls without slipping on a horizontal surface. At a certain instant its center of mass has a speed o
    10·2 answers
  • 1. A body whose mass is 2 kg and has a volume of 500cm just floats
    12·1 answer
  • কে প্রথম Anti particle এর অস্তিত্ব ঘোষণা করেন?
    14·2 answers
  • A current of 0.2A flows through a component with a resistance of 40ohms calculate the potential difference
    5·1 answer
  • An engine causes a car to move 10 meters with a force of 100 N. The engine produces 10,000 J of energy. What is the efficiency o
    6·1 answer
  • Red Riding Hood sat down to rest and placed her 1.20-kg basket of goodies beside her. A wolf came along, spotted the basket, and
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!