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
10

You are standing on a street corner and you hear an ambulance siren. The pitch of the siren seems to be getting higher. What do

you expect will happen next?
A. The pitch of the siren will change unpredictably as it approaches you.
B. The siren will get louder and higher as the ambulance moves towards you.
C. The siren will eventually fade as the ambulance moves away from you.
D. The pitch of the siren will continue to get higher, but you will not see the ambulance because it is moving away.
Physics
2 answers:
Ira Lisetskai [31]3 years ago
8 0

The answer is B

I know this because if the siren seems to be getting higher that means that the Ambulance is coming towards you. Which is was answer b is saying.


Hope this helps please make me brainliest.

Gre4nikov [31]3 years ago
4 0

B.The siren will get louder and higher as the ambulance moves towards you


Hope this helped !

You might be interested in
Everyone i need help so much
Veronika [31]

Answer:

b

Explanation:

3 0
3 years ago
Read 2 more answers
As blood passes through the capillary bed in an organ, the capillaries join to form venules (small veins). If the blood speed in
Semenov [28]

Answer:

A_2 = 2.5\ cm^2

Explanation:

given,

velocity factor = 4

Cross-sectional area of venules(A₁) = 10 cm²

cross sectional area of capillaries(A_2) = ?

continuity equation = Q = AV

now,

\dfrac{A_1}{A_2} = \dfrac{V_2}{V_1}

\dfrac{10}{A_2} =4

\dfrac{10}{4} =A_2

A_2 = 2.5\ cm^2

hence, the area of capillaries is equal to 2.5 cm₂

4 0
3 years ago
What will a spring scale read for the weight of a 75.0-kg woman in an elevator that moves upward with constant speed of 5.8 m/s
Sholpan [36]
<span>On the scale the only external forces are the man's weight acting downwards and the normal force which the scale exerts back to support his weight. So F = Ma = mg + Fs The normal force Fs (which is actually the reading on the scale) = Ma + Mg But a = 0 So Fs = Mg which is just his weight. Fs = 75 * 9.8 = 735N</span>
7 0
3 years ago
A ball is dropped off the side of a bridge.<br> After 1.55 s, how far has it fallen?
KengaRu [80]

Answer:11.7 meters

Explanation: Gravitational acceleration (g)

9.8 m/s²

Initial velocity (v₀)

0 ft/s

Height (h)

11.77225 m

Time of fall (t)

1.55 sec

Velocity (v)

15.19 m/s

6 0
3 years ago
You're driving down the highway late one night at 20 m/s when a deer steps onto the road 38 m in front of you. Your reaction tim
Bingel [31]

Answer:

given,

speed of the car = 20 m/s

final speed of car = 0 m/s

distance between car and the deer = 38 m

reaction time, t = 0.5 s

deceleration of the car = 10 m/s².

a) distance between deer and car

  distance travel in the reaction time

   d₁ = v x t

   d₁ = 20 x 0.5 = 10 m

   distance travel after you apply brake

   using equation of motion

   v² = u² + 2 a s

   0 = 20² - 2 x 10 x s

    s =  20 m

total distance traveled by the car

D = d₁ + d₂

D = 20 + 10 = 30 m

  distance between car and the deer = 38 m - 30 m

                                                              = 8 m

b) now, maximum speed car.

   distance travel in reaction time

    d₁ = s x t

    d₁ = 0.5 V

distance left between them

   d₂ = 38 - d₁

   d₂ = 38 - 0.5 V

   distance travel after you apply brake

   using equation of motion

    v² = u² + 2 a d₂

    0 = (V)² - 2 x 10 x (38 - 0.5 V)

     V² + 10 V - 760 = 0

now, solving the quadratic equation

  x = \dfrac{-b\pm \sqrt{b^2-4ac}}{2a}

  V = \dfrac{-10\pm \sqrt{10^2-4(1)(-760)}}{2(1)}

         V = 23.01 , -33.01

rejecting the negative term.

hence, maximum speed of the car could be V = 23.01 m/s

 

7 0
3 years ago
Other questions:
  • A 10 kg bowling ball would require what force to accelerate down an alleyway at a rate of 3 m/s2?
    7·1 answer
  • The prismatic bar has a cross-sectional area
    13·1 answer
  • The wavelength of some violet light is 420.0 nm. what is the frequency of this violet light?
    10·2 answers
  • What causes sedimentary rock to change into metamorphic rock
    7·1 answer
  • The acceleration due to gravity at the north pole of Neptune is approximately 11.2 m/s2. Neptune has mass 1.02×1026 kg and radiu
    11·1 answer
  • Why isn't solar energy usually the only power source for a region​
    13·1 answer
  • Conservation of energy
    15·1 answer
  • When a jet plane is cruising at high altitude, the flight attendants have more of a "hill" to climb as they walk forward along t
    12·1 answer
  • Which is one factor that contributes to the formation of polar, temperate, and tropical zones?
    14·1 answer
  • a piston has an external pressure of 8.00 atmatm . how much work has been done in joules if the cylinder goes from a volume of 0
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!