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
seropon [69]
3 years ago
13

An ambulance driver traveling at 31.0 m/s (69.3 mph) honks his horn as he sees a motorist ahead on the highway traveling in the

same direction. The motorist hears a frequency of 392 Hz and notices that his own speedometer reads 44.7 mph (20.0 m/s). Calculate the frequency that the ambulance driver hears. (Speed of sound is 340 m/s) (in Hz)
Physics
1 answer:
IrinaVladis [17]3 years ago
4 0

Answer:

fo = 378.52Hz

Explanation:

Using Doppler effect formula:

f'=\frac{C-Vb}{C-Va}*fo

where

f' = 392 Hz

C = 340m/s

Vb = 20m/s

Va = 31m/s

Replacing these values and solving for fo:

fo = 378.52Hz

You might be interested in
A block of wood is 4 cm wide, 5 cm long, and 10 cm high. It weighs 100 grams. Calculate its volume. Calculate its density. Will
77julia77 [94]

Answer:

V=200cm^3\\\\\rho =0.500g/cm^3

It will float.

Explanation:

Hello.

In this case, given the width, length and height, we can compute the volume as follows:

V=W*L*H\\\\V=4cm*5cm*10cm\\\\V=200cm^3

Moreover, since the density is computed via the division of the mass by the volume:

\rho =\frac{m}{V}

We obtain:

\rho =\frac{100g}{200cm^3} \\\\\rho =0.500g/cm^3

In such a way, since the solid has a lower density than the water, we infer it will float.

Best regards.

3 0
3 years ago
how much energy must be transferred to a normal incandescent bulb (efficiency 0.05) for it to transfer 9J of energy by light?
oksian1 [2.3K]

Answer:

Revise energy transfers and use sankey diagrams to calculate the efficiency of these conversions with BBC ... Efficiency is a measure of how much useful energy is converted. Part of ... This is the Sankey diagram for a typical filament lamp: 100 joules of electrical energy is converted to 10 joules of light energy and 90 joules.

Explanation:

3 0
3 years ago
In which region of the periodic table do the elements NOT normally react chemically with other elements?
horsena [70]

We would say that it would be metals.

6 0
2 years ago
Read 2 more answers
To have momentum, an object must be ______. A. heavy B. massive C. moving D. accelerating
Amiraneli [1.4K]
Momentum of the object can be calculated by multiplying the mass of the object and the velocity of the moving object. In this case, the starting situation should be the object should be moving, else there is no velocity and thus momentum is equal to zero .Answer is C
3 0
3 years ago
Read 2 more answers
What is the amount of space taken up by an object
Fittoniya [83]

Answer:MATTER IS ANYTHING THAT HAS VOLUME AND MASS. ALL MATTER TAKES UP SPACE. THE AMOUNT OF SPACE TAKEN UP, OR OCCUPIED, BY AN OBJECT IS KNOWN AS THE OBJECT'S VOLUME. THE CURVE THAT YOU SEE AT THE LIQUID'S SURFACE HAS A SPECIAL NAME - THE MENISCUS.

Explanation:

7 0
3 years ago
Read 2 more answers
Other questions:
  • A rollerblader is blading along the sidewalk. Which forms of measurement would be the best to use to determine the rollerblader'
    5·1 answer
  • Waves that move the particles of the medium parallel to the direction in which the waves are traveling are called
    6·1 answer
  • Many counties in Florida missed many school days in the fall of 2004 due to hurricanes that year. A solution for how to make up
    15·1 answer
  • The cytoplasm is the watery fluid found within cells. The cytoplasm holds all of the organelles, except _______, in place within
    15·1 answer
  • Find the magnitude of the force needed to accelerate a 300 g mass with a⃗ = -0.205 m/s2 i^+0.700 m/s2 j
    6·1 answer
  • Willing to give out brainliest... A vat of ethyl alcohol expands by 0.00823 m^ 3 when the temperature is raised by 44.8 °C . Wha
    8·1 answer
  • What is a transverse wave​
    11·2 answers
  • Why do sound engineers use spongy materials in the walls? (1 point)
    7·1 answer
  • A 10kg crate sits on a distant planet. The planet has the same mass as Earth, but 80% of the radius of Earth (Earth radius = 637
    6·1 answer
  • A place-kicker must kick a football from a point 36.0 m (about 40 yards) from the goal. half the crowd hopes the ball will clear
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!