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Ber [7]
3 years ago
6

What simple machines are used to create the shovel?

Physics
1 answer:
erastovalidia [21]3 years ago
7 0

Answer:

I believe a wedge and a lever

Explanation:

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Electric charge is uniformly distributed inside a nonconducting sphere of radius 0.30 m. The electric field at a point P, which
notsponge [240]

Answer:

The point that would have the same electric field as P is  z = 0.108 \ m from the center of the sphere.

Explanation:

From the question we are told that

  The  radius of the sphere is  r = 0.30 \ m

   The Electric field at point P is  E = 15000N/C  

    The distance of point P from the center is D = 0.50 \ m

Since the electric is directed radially outward it mean this it would be felt both inside and outside the sphere

The Electric field inside the sphere at a distance z is mathematically represented as

            E_i = \frac{k q x}{r^3}

where k is the coulomb's constant with a  value 9 *10^9  \ kg \cdot m^3 \cdot s^{-4 } \cdort A^{-2 }

            q is the charge

             

The Electric field inside the sphere at a distance D  is mathematically represented as            

                E _o = \frac{k q}{D^2}

To obtain the point of equal electric field

           E_i = E_o

          \frac{k q z}{r^3}  =  \frac{kq }{D^2}

 We have that

             z = \frac{r^3 }{D^2}

Substituting values

                z = \frac{(0.3)^3 }{(0.5)^2}

                z = 0.108 \ m

8 0
3 years ago
In which situation is no work considered to be done by a force?
Ber [7]

Answer:

O B. when the angle between the force and displacement is 90°

Explanation:

<h3>work defined as   w = f cos Ф * d. </h3><h3>work  can only be done if object moves(displacement) in the direction of force. now a quick one. if you since the varrious angles into the cosine, you would see that Cos 90 will give zero which implies that no work is done. Again, angle means it is perpendicular and so it is not in the direction of force.</h3>
7 0
3 years ago
Who was th efirst person to come up with the idea of the atoms.
Gwar [14]

Answer:

Democritus

Explanation:

Democritus was a Greek philosopher who was the first person to use the term atom . However ,John Dalton was the first to adapt Democritus’ theory into the first modern atomic

model

7 0
2 years ago
What happens when two aqueous solutions are combined in a precipitation reaction and no precipitate is formed?   A. The solution
inysia [295]

There's no reaction for me.

5 0
3 years ago
Help help help help help help help help help
Stells [14]
Yes yes yes yes yes yes yes yes
4 0
3 years ago
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