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nignag [31]
3 years ago
5

An electron is placed at a position on the x-axis where the electric potential is + 10 V. Which idea below best describes the fu

ture motion of the electron?
(a) The electron will move left (-x) since it is negatively charged.(b) The electron will move right (+x) since it is negatively charged.(c) The electron will move left (-x) since the potential is positive.(d) The electron will move right (+x) since the potential is positive.(e) The motion cannot be predicted with the information given.
Physics
1 answer:
ludmilkaskok [199]3 years ago
7 0

Answer:

option (e)

Explanation:

As the electron is placed at a point where the potential is  + 10 V. electrons moves from lower potential to higher potential, so we cannot predict the direction of motion because we don't have any information about the potential at other point.

So, option (e) is correct.

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Inez uses hairspray on her hair each morning before going to school. The spray spreads out before reaching her hair partly becau
Tamiku [17]

Answer:

7.0\cdot 10^{-13}C

Explanation:

The magnitude of the electrostatic force between two charged objects is

F=k\frac{q_1 q_2}{r^2}

where

k is the Coulomb's constant

q1 and q2 are the two charges

r is the separation between the two charges

The force is attractive if the charges have opposite sign and repulsive if the charges have same sign.

In this problem, we have:

r=0.070 cm =7\cdot 10^{-4} m is the distance between the charges

q_1=q_2=q since the charges are identical

F=9.0\cdot 10^{-9}N is the force between the charges

Re-arranging the equation and solving for q, we find the charge on each drop:

F=\frac{kq^2}{r^2}\\q=\sqrt{\frac{Fr^2}{k}}=\sqrt{\frac{(9.0\cdot 10^{-9})(7\cdot 10^{-4})^2}{8.99\cdot 10^9}}=7.0\cdot 10^{-13}C

8 0
3 years ago
A thin, metallic spherical shell of radius 0.187 m has a total charge of 6.53×10−6 C placed on it. A point charge of 5.15×10−6 C
MAVERICK [17]

Answer: a) 112.88 * 10^3 N/C; b) The electric field point outward from the center of the sphere.

Explanation: In order to solve this problem we have to use the gaussian law so we use a gaussian surface at r=0.965 m and the electric flux is equal to Q inside/εo

E* 4*π*r^2= Q inside/εo

E= k*Q inside/r^2= 9*10^9*(6.53+5.15)μC/(0.965)^2=122.88 * 10 ^3 N/C

5 0
3 years ago
What is the kinetic energy of a 620.0 kg roller coaster moving with a velocity of 9.00 m/s? Round to 3 significant figures.
oee [108]
Im pretty sure it’s 25,100 J because i had seen the same question a few times with this answer, hope it helps!
8 0
3 years ago
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What minimum volume must the slab have for a 75.0 kgkg woman to be able to stand on it without getting her feet wet
Alisiya [41]

V = 0.9375 m3 is minimum volume .

<h3>What is density ?</h3>
  • We use the word "density" to indicate how much space (or "volume") an object or substance occupies in relation to the amount of matter contained therein (its mass).
  • Density can also be defined as the quantity of mass per unit of volume. A dense object is one that is both hefty and small.

Given,

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Learn more about density

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6 0
2 years ago
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a= \omega ^2 r
In our problem, r=6 cm=0.06 m, so we can solve for \omega:
\omega = \sqrt{ \frac{a}{r} } = \sqrt{ \frac{113000 \cdot 9.81 m/s^2}{0.06 m} }=4298 rad/s
However, we must convert it into rpm (revolution per minute).
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4 0
4 years ago
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