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
frosja888 [35]
3 years ago
9

A column of soldiers, marching at 114 steps per minute, keep in step with the beat of a drummer at the head of the column. It is

observed that the soldiers in the rear end of the column are striding forward with the left foot when the drummer is advancing with the right. What is the approximate length of the column? (Take the speed of sound to be 343 m/s.)
Physics
1 answer:
kipiarov [429]3 years ago
5 0

Answer:

length of column is 140.42 m

Explanation:

in 1 min the soldiers travels 114 steps

so to complete 1 step the time taken by the soldiers =

t =  \dfrac{1\ min}{114}

t =  \dfrac{60}{114}  

t = 0.526 s

speed of sound = 343 m/s

length of the column = v × t

                                   = 343 m/s × 0.526 s

                                   = 140.42 m

hence the length of column is 140.42 m

You might be interested in
Calculate the mass of -1.5C of electrons​
algol13
The electron is a type of low-mass, very negatively charged with a particle. As such, it can easily be deflected by passing close to other electrons or the positive nucleus of an atom. m = mass of an electron in kg = 9.10938356 × 10-31 kilograms. e = magnitude of the charge of an electron in coulombs = 1.602 x 10-19 coulombs. Hope this helps!
8 0
3 years ago
SP: Calculate the moment
ipn [44]

Answer:

Moment of the force is 20 N-m.

Explanation:

Given:

Force exerted by the person is, F=80\ N

Distance of application of force from the point about which moment is needed is, d=25\ cm=\frac{25}{100}\ m=0.25\ m

Now, we know that, moment of a force 'F' about a point at a perpendicular distance of 'd' from the same point is given as the product of the force and the perpendicular distance.

Therefore, the moment of the force about the end of the claw hammer is given as:

M=F\times d\\\\M=(80\ N)(0.25\ m)\\\\M=20\textrm{ N-m}

Hence, the moment of the force exerted by the person about the end of the claw hammer is 20 N-m.

6 0
3 years ago
Which of the following is an example of an electromagnetic wave ?
Alex

Answer:

Its a wave

Explanation:

THis is one

3 0
3 years ago
Read 2 more answers
How many significant digits should the answer to the following problem have? (2.49303 g) * (2.59 g) / (7.492 g) =
Feliz [49]

The number of significant digits to the answer of the following problem is four.

<h3>What are the significant digits?</h3>

The number of digits rounded to the approximate integer values are called the significant digits.

The following problem is

(2.49303 g) * (2.59 g) / (7.492 g) =

On solving we get

= 0.86184566204

The answer is approximated to  0.86185

Thus, the significant digits must be four.

Learn more about significant digits.

brainly.com/question/1658998

#SPJ1

6 0
2 years ago
Geocentric theory:
grandymaker [24]
I believe d all of the above
3 0
3 years ago
Other questions:
  • If we have less power, we most likely have (2 points)
    14·1 answer
  • If a car has an initial velocity of 20 m/s and accelerates at 2.0 m/s² for 100 m, what is its final velocity?
    8·1 answer
  • Which of the following would increase friction?
    14·1 answer
  • Which is the correct life sequence of a star?  
    11·2 answers
  • The gravity tractor is a proposed spacecraft that will fly close to an asteroid whose trajectory threatens to impact the Earth.
    6·1 answer
  • Need help now due in 2 minutes
    10·1 answer
  • What’s the answer ???
    15·1 answer
  • Mary is investigating the densities of objects. She is going to use the table below to record her results. Which of these can sh
    6·1 answer
  • 20 POINTS! PLZ HELP ME. :-)
    10·1 answer
  • Watch Bill Nye the Science Guy wave and I will make you brainlist yes and I will give you 25 points and pls do the notes
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!