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
faust18 [17]
3 years ago
6

Una niña juega a saltar con la cuerda, realizando 40 saltos en un minuto. ¿Cuál de los siguientes conceptos se asocia de mejor m

anera con lo descrito en la situación?
Physics
1 answer:
dmitriy555 [2]3 years ago
8 0

Answer:

he angular velocity  w = 4.19 rad / s

Explanation:

The girl is synchronized with the movement of the rope, therefore we can describe the movement of the girl with the angular velocity

       w = θ/t

if we fear 40 jumps and each one is a revolution

       θ = 40 2pi = 80π radiation

       t = 1 min = 60 s

       w = 80π / 60

       w = 4.19 rad / s

this must be the same angular velocity of the rope

You might be interested in
A physics student with too much free time drops a watermelon from a roof of a building, hears the sound of the watermelon going
tatiyna

Answer:

28.6260196842 m

Explanation:

Let h be the height of the building

t = Time taken by the watermelon to fall to the ground

Time taken to hear the sound is 2.5 seconds

Time taken by the sound to travel the height of the cliff = 2.5-t

Speed of sound in air = 340 m/s

For the watermelon falling

s=ut+\frac{1}{2}at^2\\\Rightarrow h=0t+\frac{1}{2}\times 9.81\times t^2\\\Rightarrow h=\frac{1}{2}\times 9.81\times t^2

For the sound

Distance = Speed × Time

\text{Distance}=340\times (2.5-t)

Here, distance traveled by the stone and sound is equal

\frac{1}{2}\times 9.81\times t^2=340\times (2.5-t)\\\Rightarrow 4.905t^2=340\times (2.5-t)\\\Rightarrow t^2=\frac{340}{4.905}(2.5-t)\\\Rightarrow t^2+69.3170234455t-173.292558614=0

t=\frac{-69.31702\dots +\sqrt{69.31702\dots ^2-4\cdot \:1\cdot \left(-173.29255\dots \right)}}{2\cdot \:1},\:t=\frac{-69.31702\dots -\sqrt{69.31702\dots ^2-4\cdot \:1\cdot \left(-173.29255\dots \right)}}{2\cdot \:1}\\\Rightarrow t=2.4158\ s\ or\ -71\ seconds

The time taken to fall down is 2.4158 seconds

h=\frac{1}{2}\times 9.81\times 2.4158^2=28.6260196842\ m

Height of the buidling is 28.6260196842 m

7 0
3 years ago
Copper wire is 1. 9 mm in diameter and carries a current of 20 a. What is the electric field stregnth inside this wire?
Tju [1.3M]

The electric field strength will be 0.6252 V/m. It is the strength at which the field is created by charges.

<h3>What is electric file strength?</h3>

The electric field strength is defined as the ratio of electric force and charge.

The electric field strength is found as;

\rm E = \frac{I \rho }{A} \\\\ \rm E = \frac{20  \times 1.68 \times 10^{-8} }{ (0.6385 \times 10^{-6}} \\\\ E= 0.5262 \  V/m

Hence, the electric field strength will be 0.6252 V/m.

To learn more about the electric field strength, refer to the link;

brainly.com/question/4264413

#SPJ4

3 0
2 years ago
A light ray bounces off a fish in your aquarium. It travels
frutty [35]

Answer:

Correct

Explanation:

Because the light can't travel as quickly in the water as it does in the air, the light bends around the pencil, causing it to look bent in the water. Basically, the light refraction gives the pencil a slight magnifying effect, which makes the angle appear bigger than it actually is, causing the pencil to look crooked.

7 0
3 years ago
Read 2 more answers
A) What is the meaning of specific heat capacity ?​
dem82 [27]

Explanation:

the heat required to raise the temperature of the unit mass of a given substance by a given amount (usually one degree).

3 0
3 years ago
Oceanic crust is much denser than continental crust
Free_Kalibri [48]
Oceanic because it’s denser
8 0
3 years ago
Read 2 more answers
Other questions:
  • What is the equation for an inelastic collision
    6·1 answer
  • Which voice can produce a pitch that has a speed of 343 m/s and a wavelength of 0.68 m?
    9·1 answer
  • according to Bob, on earth, it is 20 ly to planet y. anna has just passed earth, moving at constant speed v in a spaceship. when
    8·1 answer
  • A car travels 35 km west and 90 km north in two hours what is its average velocity?
    8·1 answer
  • At which location could you place the south pole of a bar magnet so that it would be pulled toward the magnet shown?
    14·1 answer
  • Why do you think renewable energy is gaining attention in the U.S?
    8·1 answer
  • According to newton's first law of motion for every action there is an equal and opposite reaction? true or false
    14·1 answer
  • Velocity-time graph worksheet?
    13·2 answers
  • An electron in an atom's orbital shell, labeled X in the model below, released enough energy to move to a different orbital shel
    12·1 answer
  • Match the following ERA’s Question 4
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!