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Dimas [21]
2 years ago
9

Answer asap asap! -----------------

Physics
1 answer:
vova2212 [387]2 years ago
7 0

Answer:

Neutral

Explanation:

A neutral atom has an equal number of protons and electrons so that the positive and negative charges exactly balance. Since it is the electrons that determine how one atom interacts with another, in the end it is the number of protons in the nucleus that determines the chemical properties of an atom.

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Vladimir79 [104]
(a) The force exerted by the electric field on the plastic sphere is equal to
F=qE
where q=-3.4 nC=-3.4 \cdot 10^{-9} C is the charge of the sphere and E is the strength of the electric field. This force should balance the weight of the sphere:
F=mg =0.9 g
where m is the mass of the sphere and g is the gravitational acceleration.

Since the two forces must be equal, we have:
qE=mg
and so we find the intensity of the electric field
E= \frac{mg}{q}= \frac{0.9 \cdot 9.81 m/s^2}{3.4 \cdot 10^{-9} C} =2.6 \cdot 10^9 N/C

(b) Now let's find the direction of the field. The electric force must balance the weight of the sphere, which is directed downward, so the electric force should be directed upward. Since the charge is negative, the force is opposite to the electric field direction, and so the direction of the electric field is downward.
4 0
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A surfer is moving at a constant velocity of 5.2 m/s north relative to a wave which is pushing him west at a constant velocity o
Vika [28.1K]
The speed and distances are directly proportional. Use ratios to solve for vertical y-distance. The ratio of x-distance west to y-distance north equals the x-velocity to y-velocity.

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5 0
2 years ago
The table shows the decay in a 59 g sample of bismuth 212 overtime.
Vikki [24]

Answer: C

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Explanation:

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N = No/2 = 59/2

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Answer:

B. silicate rocks and metals

8 0
3 years ago
Can a body have two acceleration at a time?​
bixtya [17]

Answer:

No.

Explanation:

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a = dv/dt

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dt is change in time

At a particular time, its change in velocity can be one only. It would imply that a body cannot have two acceleration at a particular time.

8 0
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