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GalinKa [24]
3 years ago
5

4. In the image, a rubber balloon is being rubbed back and forth against a wool

Physics
1 answer:
den301095 [7]3 years ago
6 0

lost some electrons I think

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Use the work energy theorem to solve each of these problems and neglect air resistance in all cases. a) A branch falls from the
Sav [38]

Answer:

a)43.8 m/s

b)103.54 m/s

Explanation:

Work energy theorem

ΔE_{k}= ΔE_{g}

E_{k2} - E_{k1}=-(E_{g2} - E_{g1})\\\\ \frac{1}{2} mv^{2}_{2}- \frac{1}{2} mv^{2}_{1}+ mgh_{2} - mgh_{1} = 0

a) In this part v1=0 and h2=0

\frac{1}{2} mv^{2}_{2}- \frac{1}{2} mv^{2}_{1}+ mgh_{2}- mgh_{1} = 0\\\\\\\\\v_{2} =\sqrt{2gh_{1}} = \sqrt{2*9.8*98} =43.8 m/s=0

b) in this part v2=0, h1= 0, and h2= 545m

\frac{1}{2} v^{2}_{1}= gh_{2} \\v_{1} =\sqrt{2gh_{2}}=103.54m/s

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3 years ago
Me izz in canada hehe Xd<br>just in 2 mins wow​<br><br>what is immunization?
Kruka [31]

Answer:

Immunization, or immunisation, is the process by which an individual's immune system becomes fortified against an infectious agent.

Explanation:

<em>HOPE</em><em> </em><em>IT</em><em> </em><em>HELPS</em><em> </em>

<em>HAVE</em><em> </em><em>A</em><em> </em><em>NICE</em><em> </em><em>DAY</em><em> </em><em>:)</em><em> </em>

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3 years ago
A dog has a mass of69kg and an acceleration of 2m/s/s. What is the force of the dog?
Anna35 [415]

Answer:

<h2>138 N</h2>

Explanation:

The force acting on an object given it's mass and acceleration can be found by using the formula

force = mass × acceleration

From the question we have

force = 69 × 2

We have the final answer as

<h3>138 N</h3>

Hope this helps you

7 0
3 years ago
7Which of the following terms describes how glaciers move?
tatuchka [14]

Answer:

D is the answer  I think (0 w 0 )

Explanation:

7 0
4 years ago
Read 2 more answers
I need help by today guys plz help
NISA [10]

radio waves bc they have the longest wave lenthgs in a magnetic spectrum

5 0
3 years ago
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