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jasenka [17]
3 years ago
9

In an atom, the electrons travel outside the____.

Physics
1 answer:
STatiana [176]3 years ago
4 0
Nucleus, made up of protons and neutrons and can be found in the center of the atom
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A pulley system with a mechanical advantage of 15 is used to lift a 1750 N piano to a third floor balcony that is 7 m above the
devlian [24]

Answer:

The  force is E = 117 \  N

Explanation:

From the question we are told that

     The  mechanical advantage is  ME =  15

     The load is L  =  1750 \  N

      The  height is  h  =  7  \  m

Generally mechanical advantage is mathematically represented as

       ME =  \frac{L }{E }

Here E is the force that must be applied to move the piano

=>     E =  \frac{L}{ ME }

=>     E =  \frac{1750 }{15  }

=>     E = 117 \  N

6 0
2 years ago
a horizontal force of 100N is required to push a crate across a factory floor at a constant speed. What is the net force acting
Bas_tet [7]

If the crate is moving along the floor in the same direction with a constant speed, it is in dynamic equilibrium. Equilibrium means there is no net force acting on the crate.

Since there is no net force on the crate, there must be a friction force on the crate equal in magnitude and opposite in direction to the applied horizontal force. Therefore the force of friction acting on the crate is 100N.

8 0
3 years ago
Which of the circuit diagrams shown in Figure 21-1A is a parallel circuit?
Thepotemich [5.8K]
I and II only it’s has multiple paths for the electricity to flow
4 0
3 years ago
Using a simple machine, a student is able to lift a 500N weight by applying only 100N.
pishuonlain [190]
Hey there!

a \ student  \ is \ able \ to \ lift \ a \ 500(n) \\ weight \ by \ applying \ only  \ 100(n) \\ \\ so, \ this \ info \ here, \ we \ simply \ divide \ by \\ how \ much \ this \ kid \ lifted, \ by \ the \ weight \ he/she \\ \ is \ applying. \\ \\   \left[\begin{array}{ccc}\boxed{\boxed{500(n)/100(n)}}\end{array}\right] \\ \\ and \ from \ this,\ your \ answer \ would \ \\ conclude \ to \ be \ (5) \\ \\ \boxed{5} \ would \ be \ your \ answer!

Hope this helps you!
7 0
3 years ago
Female scientist who came to america to study starts at harvard
krok68 [10]
Is that a question? If it is not what its the question?
7 0
3 years ago
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