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nirvana33 [79]
3 years ago
8

Determina la velocidad de un avión que recorre 459 km en 67 min

Physics
1 answer:
satela [25.4K]3 years ago
4 0

Answer:

122397.7

Explanation:

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The 2-kg collar is attached to a spring that has an un-stretched length of 3.0 m. If the collar is drawn to point B and releases
Bezzdna [24]

Complete Question

The image for this question is shown on the first uploaded image

Answer:

v =  3.4 \ m/s

Explanation:

From the question we are told that

   The mass of the collar is  m =  2 \ kg

    The original length is  L =  3.0 \ m

     The spring constant is  k =  3.0 \ N/m

     

Generally the extension of the spring  is  mathematically evaluated as

        e =  4 -3 =  1 \ m

Now with Pythagoras theorem we can obtain the length from A to B as

        AB  =  \sqrt{5 ^2  + 4^2}

       AB  = 6.4 \ m

The  extension of the spring at B is  

     e_b  =  6.4 -  3 =  3.4 \ m

According to the law of energy conservation

   The energy stored in the spring at point A +  the kinetic energy of the  spring =  The  energy stored on the spring at B

So

     \frac{1}{2}  *  k * e  +  \frac{1}{2}  * m* v^2  =  \frac{1}{2}  *  k * e_b

substituting values

    \frac{1}{2}  *  3 * 1^2  +  \frac{1}{2}  * 2* v^2  =  \frac{1}{2}  *  3 *  3.4^2

=>   v =  3.4 \ m/s

8 0
4 years ago
What type of mirror can produce both<br> converging and diverging rays?
Ivahew [28]

Answer:

A convex mirror is a diverging mirror (f is negative) and forms only one type of image. It is a case 3 image—one that is upright and smaller than the object, just as for diverging lenses.

Explanation:

hope this helps have a good night :)

4 0
3 years ago
Read 2 more answers
Calculate the current in a circuit whose total resistance is 4 ohms and whose emf is 12 volts.
marishachu [46]
V = I R
12 = I x 4
I = 12 ÷ 4 = 3 A
5 0
3 years ago
If a series circuit contains a 12-V battery, a 6-ohm resistor, and a 4-ohm resistor, what is the current in the circuit?
Shalnov [3]

In a series circuit the total current is the same throughout resistors and so:

I_{total}=I_1=I_2

The voltage is distributed throughout the resistors and so:

V_{total}=V_1+V_2

and the total resistance can be calculated by adding up the resistors resistance:

R_{total}=R_1+R_2

First thing is to calculate the total resistance and so:

R_{total}=6\Omega + 4\Omega = 10\Omega

And by Omh's law V=IR we have:

V_{total}=I_{total}R_{total}\\\\I_{total}=\frac{V_{total}}{R_{total}}= \frac{12V}{10\Omega} =1.2A

And so the total current of the circuit is 1.2 amps i.e. 1.2 A.


6 0
3 years ago
Read 2 more answers
Why is it important to learn refusal skills?
Elena L [17]

I'd say C to avoid situations in which alcohol is present and remain alcohol free

Refusal skills help people, most likely children it helps them avoid participating in risky behaviors and choices. such like alcohol in this case

Refusal skills Helps them resist peer pressure and help them make right choices


Hope that helps alrighty bye now!

6 0
3 years ago
Read 2 more answers
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