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
finlep [7]
3 years ago
9

A plane flying against the wind covers the 900-kilometer distance between two aerodromes in 2 hours. The same plane flying with

the wind covers the same distance in 1 hour and 48 minutes. If the speed of the wind is constant, what is the speed of the wind?
Physics
1 answer:
Mashcka [7]3 years ago
4 0

Answer:

The speed of the wind is 25 km/hr.

Explanation:

Let us call v_p the speed of the plane and v_w the speed of the wind. When the plane is flying against the wind, it covers the distance of 900-km in 2 hours (120 minutes); therefore;

(1). v_p - v_w = \dfrac{900km}{120min}

And when the plane is flying with the wind, it covers the same distance in 1 hour 48 minutes (108 minutes)

(2). v_p+v_w= \dfrac{900km}{108min}

From equation (1) we solve for v_p and get:

v_p = \dfrac{900km}{120min}+v_w,

and by putting this into equation (2) we get:

\dfrac{900km}{120min}+v_w+v_w= \dfrac{900km}{108min}

2v_w= \dfrac{900km}{108min}-\dfrac{900km}{120min}

2v_w = 8.3km/min - 7.5km/min

2v_w = 0.83km/min

v_w = 0.4165km/min

or in km/hr this is

\boxed{v_w= 25km/hr }

You might be interested in
What are some ways you could demonstrate parliamentary procedure skills during a meeting? Which parliamentary rule do you think
Ierofanga [76]

The parliamentary procedural skills which can be emulated during a meeting include but are not limited to;

  • Creating a manual to develop a working format for proper parliamentary procedure.

  • Creating an agenda. This follows from the fact that the absence of am agenda makes it quite difficult to conduct the meeting and hence, the meeting may become uncontrollable.

  • The importance of a "minutes" document cannot be overemphasized. The minutes will contain a brief, but comprehensive review of the previous meeting as this can serve as an anchor to the current one.

  • It is also important to appoint a member to be the parliamentarian if the chairman isn't already.

<h3>What are the ways to demonstrate parliamentary procedural skills?</h3>

The parliamentary procedure in its simplicity may seem like a guide for the conduct of analogous gatherings.

Hence, the parliamentary rules are as listed above in which case, the most important is to create an agenda as the meeting can become rowdy otherwise.

Read more on parliamentary rules;

brainly.com/question/23265511

#SPJ1

8 0
2 years ago
Assume the following values: d1 = 0.880 m , d2 = 1.11 m , d3 = 0.560 m , d4 = 2.08 m , F1 = 510 N , F2 = 306 N , F3 = 501 N , F4
dsp73

Answer:

= 2630.6 N.m

Explanation:

(FR)x = ΣFx = -F4 = -407 N

(FR)y = ΣFy =-F1-F2 -F3 = -510 - 306 - 501 = -1317 N

(MR)B =ΣM + Σ(±Fd)

= MA + F1(d1 +d2) + F2d2 - F4d3

= 1504 + 510(0.880+1.11) +306(1.11) - 407(0.560)

= 2630.64 N.m (counterclockwise)

6 0
4 years ago
Consider a 2-kg bowling ball sits on top of a building that is 40 meters tall. It falls to the ground. Think about the amounts o
likoan [24]

Answer:

1) At the highest point of the building.

2) The same amount of energy.

3) The kinetic energy is the greatest.

4) Potential energy = 784.8[J]

5) True

Explanation:

Question 1

The moment when it has more potential energy is when the ball is at the highest point in the building, that is when the ball is at a height of 40 meters from the ground. It is taken as a point of reference of potential energy, the level of the soil, at this point of reference the potential energy is zero.

E_{p} = m*g*h\\E_{p} = 2*9.81*40\\E_{p} = 784.8[J]

Question 2)

The potential energy as the ball falls becomes kinetic energy, in order to be able to check this question we can calculate both energies with the input data.

E_{p}=m*g*h\\ E_{p} = 2*9.81*20\\ E_{p} = 392.4[J]\\

And the kinetic energy will be:

E_{k}=0.5*m*v^{2}\\  where:\\v =  velocity = 19.8[m/s]\\E_{k}=0.5*2*(19.8)^{2}\\  E_{k}=392.04[J]

Therefore it is the ball has the same potential energy and kinetic energy as it is half way through its fall.

Question 3)

As the ball drops all potential energy is transformed into kinetic energy, therefore being close to the ground, the ball will have its maximum kinetic energy.

E_{k}=E_{p}=m*g*h = 2*9.81*40\\  E_{k} = 784.8[J]\\ E_{k} = 0.5*2*(28)^{2}\\ E_{k} = 784 [J]

Question 4)

It can be easily calculated using the following equation

E_{p} =m*g*h\\E_{p}=2*9.81*40\\E_{p} =784.8[J]

Question 5)

True

The potential energy at 20[m] is:

E_{p}=2*9.81*20\\ E_{p}= 392.4[J]\\The kinetic energy is:\\E_{k}=0.5*2*(19.8)^{2} \\E_{k}=392[J]

3 0
3 years ago
School homework about multiplying fractions <br><br>worth 30 brainly points​
RoseWind [281]

Answer:

Explanation:

1. \frac{1}{3} x \frac{6}{7} = \frac{6}{21}

          = \frac{2}{7}

b. \frac{6}{8} + \frac{4}{9} = \frac{24}{72}

            = \frac{1}{3}

c. \frac{10}{15} x \frac{3}{4} = \frac{30}{60}

            = \frac{1}{2}

d. \frac{7}{10} of \frac{5}{10} = \frac{7}{10} x \frac{5}{10}

                = \frac{35}{100}

                = \frac{7}{20}

e. \frac{3}{8} of \frac{4}{6} = \frac{3}{8} x \frac{4}{6}

            = \frac{12}{48}

            = \frac{1}{4}

f. \frac{7}{12} of \frac{9}{14} = \frac{7}{12} x \frac{9}{14}

              = \frac{63}{168}

              = \frac{3}{8}

2. \frac{22}{6} x \frac{3}{11} = \frac{66}{66}

              = 1

b. \frac{15}{6} x \frac{4}{5} = \frac{60}{30}

             = 2

c. \frac{25}{8} x \frac{4}{10} = \frac{100}{80}

              = \frac{5}{4}

d. \frac{33}{12} x \frac{4}{15} = \frac{132}{180}

             = \frac{11}{15}

4 0
3 years ago
How does a scientific theory compare to a scientific law?
shusha [124]

Answer:

In general, a scientific law is the description of an observed phenomenon. It doesn't explain why the phenomenon exists or what causes it. The explanation of a phenomenon is called a scientific theory. It is a misconception that theories turn into laws with enough research.

Explanation:

Hope this helped

6 0
3 years ago
Read 2 more answers
Other questions:
  • A circuit constrains one light bulb and one battery. What happens to the total resistance in the circuit if you replace one ligh
    9·1 answer
  • Abby throws a ball straight up and times it. she sees that the ball goes by the top of a flagpole after 0.50 s and reaches the l
    8·1 answer
  • Why is it important to balance a chemical equation?
    5·2 answers
  • The Laws of the Game are the rules for playing soccer. <br><br>A. True <br>B. False​
    10·2 answers
  • Which of the following best describes acceleration
    9·1 answer
  • 5. Infer What might happen to sand in a<br><br> valley if more sand is deposited on top of it?
    9·1 answer
  • Mitch holds a pumpkin at waist level. How can he add potential energy to the pumpkin?
    8·1 answer
  • Can somebody plz help me with this one the question is in the screen shot.
    14·1 answer
  • If an object is placed between the focal point and twice the focal length of a convex lens, which type of image will be produced
    9·1 answer
  • Show by dimension that the equation of motion is correct <br>V² = U²+2as​
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!