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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

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Determine the acceleration that results when a 12 N net force is applied to a 3 kg object.
Drupady [299]
A I hope it helpsss youuu ;:))))
8 0
3 years ago
In preparation for the final exam, our astronomy study group has reconvened to discuss Mercury's unique orbital properties. They
grigory [225]

Answer:

The only incorrect statement is from student B

Explanation:

The planet mercury has a period of revolution of 58.7 Earth days and a rotation period around the sun of 87 days 23 ha, approximately 88 Earth days.

Let's examine student claims using these rotation periods

Student A. The time for 4 turns around the sun is

           t = 4 88

           t = 352 / 58.7 Earth days

In this time I make as many rotations on itself each one with a time to = 58.7 Earth days

           #_rotaciones = t / to

           #_rotations = 352 / 58.7

           #_rotations = 6

therefore this statement is TRUE

student B. the planet rotates 6 times around the Sun

          t = 6 88

          t = 528 s

The number of rotations on itself is

           #_rotaciones = t / to

           #_rotations = 528 / 58.7

           #_rotations = 9

False, turn 9 times

Student C. 8 turns around the sun

           t = 8 88

           t = 704 days

the number of turns on itself is

            #_rotaciones = t / to

            #_rotations = 704 / 58.7

            #_rotations = 12

True

The only incorrect statement is from student B

6 0
2 years ago
A voltage source provides ___________ required for electric current.
Gnoma [55]
Two terminal device which can maintain a fixed voltage. Hope this help I need more detail in your question this is all I can provide. :)
8 0
3 years ago
Drivers should train themselves to scan ahead two seconds looking for ________ hazards and from 10-12 seconds down the road for
xxTIMURxx [149]

Answer:

Immediate, potential

Explanation:

In america there are many safety council .in which drivers are trained. According to american safety council in america the drivers are trained in such a way that they can ahead two seconds so that there will not be any immediate hazards and 10 to 12 seconds down the road for potential hazards

So in the blanks there will be immediate and potential

3 0
3 years ago
1. A soccer ball is kicked horizontally off a cliff with an initial speed of 8 m/s and lands 16 m from the base of
lana66690 [7]

Answer:

Height of cliff = S = 20 m (Approx)

Explanation:

Given:

Initial velocity = 8 m/s

Distance s = 16 m

Starting acceleration (a) = 0

Computation:

s = ut + 1/2a(t)²

16 = 8t

t = 2 sec

Height of cliff = S

Gravitational acceleration = 10 m/s

S = 1/2a(t)²

S = 1/2(10)(2)²

Height of cliff = S = 20 m (Approx)

3 0
3 years ago
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