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
saveliy_v [14]
3 years ago
7

An echo is heard from a cliff 3.71 s after a rifle is fired. How many feet away is the cliff

Physics
1 answer:
LenKa [72]3 years ago
3 0

The cliff is 2042 ft away.

We know that the speed of sound in air is directly proportional to the absolute temperature.

First convert the Fahrenheit temperature to Celsius;

 °C = 5/9(44.5 - 32)

°C = 6.9 °C

Applying the formula;

V1/V2 = √T1/T2

Where; V1 = velocity of sound in air at  0°C

V2 = Velocity of sound in air at 6.9 °C

1087/V2 = √273/279.9

V2= 1101 ft/s

Given that; V = 2s/t

Where s is the distance of the cliff

t is the time taken

1101 ft/s = 2s/3.71 s

s = 1101 ft/s × 3.71 s/2

s = 2042 ft

Learn more:brainly.com/question/15381147

You might be interested in
A 75.0 Ohm resistor uses 0.285 W of power. What is the voltage across the resistor?
Brilliant_brown [7]

Answer:4.62

Explanation:

Acellus

6 0
3 years ago
There are many risks associated with nuclear power. Which is NOT a risk associated with nuclear power?
andrew11 [14]
1. I think is letter b.
2. I thinks it's letter c.
6 0
3 years ago
Read 2 more answers
Match the term with its description.
Mrac [35]

A=Ion

B=pH

C=Acid

D=Alkaline

6 0
3 years ago
Water is boiled at sea level in a coffeemaker equipped with an immersion-type electric heating element. The coffee maker contain
Luden [163]

Answer:

P=1362\ W

t'=251.659\ s is time required to heat to boiling point form initial temperature.

Explanation:

Given:

initial temperature of water, T_i=18^{\circ}C

time taken to vapourize half a liter of water, t=18\ min=1080\ s

desity of water, \rho=1\ kg.L^{-1}

So, the givne mass of water, m=1\ kg

enthalpy of vaporization of water, h_{fg}=2256.4\times 10^{-3}\ J.kg^{-1}

specific heat of water, c=4180\ J.kg^{-1}.K^{-1}

Amount of heat required to raise the temperature of given water mass to 100°C:

Q_s=m.c.\Delta T

Q_s=1\times 4180\times (100-18)

Q_s=342760\ J

Now the amount of heat required to vaporize 0.5 kg of water:

Q_v=m'\times h_{fg}

where:

m'=0.5\ kg= mass of water vaporized due to boiling

Q_v=0.5\times 2256.4

Q_v=1.1282\times 10^{6}\ J

Now the power rating of the boiler:

P=\frac{Q_s+Q_v}{t}

P=\frac{342760+1128200}{1080}

P=1362\ W

Now the time required to heat to boiling point form initial temperature:

t'=\frac{Q_s}{P}

t'=\frac{342760}{1362}

t'=251.659\ s

6 0
3 years ago
How far is the region from the equator or helps control climate
alexira [117]

could you please specify?

4 0
3 years ago
Other questions:
  • A child goes down a slide with an initial height of 4m. What is his speed at the bottom of the slide? There is no other informat
    9·1 answer
  • 15. The
    7·1 answer
  • How are chargeable cells different from ordinary dry cells​
    13·1 answer
  • PLS HELP I NEED THIS BY TODAY
    9·1 answer
  • R: Law of Conservation of Energy Pre-Write
    12·1 answer
  • Why does a Parallel Circuit still continue to function after a switch turns off one bulb but continues to pass through the secon
    5·1 answer
  • A body floats at a volume of 2/5 when it is placed in oil, how dense the object is ....s=900km/m3​
    10·1 answer
  • What are the examples of Inertia of motion​
    14·1 answer
  • The speed of a star, can you measure it? Is it constant?
    7·1 answer
  • USE INTERNET TO ANSWER THE FOLLOWIN 6. Research about the causes of the following: (use diagrams were necessary
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!