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Lostsunrise [7]
3 years ago
15

A Sodium ion has a positive charge because it has

Physics
2 answers:
Alla [95]3 years ago
5 0

Answer:

One electron in it's outer shell

kolbaska11 [484]3 years ago
4 0

Answer:

This is because the 11 positive protons and 10 negative electrons end up with an overall charge of +1.

Explanation:

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A convex mirror is placed to the right of an object. The image formed by the mirror will be a
kotegsom [21]

Answer:If you look at the image of the toy car in the mirror, it will appear to be the same ... However, there is a virtual focal point on the other side of the mirror if we follow them ... Concave mirrors, on the other hand, can have real images. ... Naturally, in concave mirror, the closer the image to the mirror, the bigger the image formed.

8 0
2 years ago
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You drop a batitin a stationary elevator and the ball hits the floor in o 50 s. How long does it take for the ball to hit the fl
solmaris [256]

Answer:

option (a) 0.61 s

Explanation:

Given;

Time taken by the ball to reach the ground  = 0.50 s

Let us first calculate the distance through which the ball falls on the ground

from the Newton's equation of motion, we have

s=ut+\frac{1}{2}at^2

where,  

s is the distance

a is the acceleration

t is the time

here it is the case of free fall

thus, a = g = acceleration due to gravity

u =  initial speed of the ball = 0

on substituting the values, we get

s=0\times 0.50+\frac{1}{2}\times9.8\times0.50^2

or

s = 1.225 m

Now,

when the elevator is moving up with speed of 1.0 m/s

the initial speed of the ball = -1.0 m/s   (as the elevator is moving in upward direction)

thus , we have

s=ut+\frac{1}{2}at^2

or

1.225=-1.0\times\ t+\frac{1}{2}\times9.8t^2

or

4.9t^2 - t  - 1.225 = 0

or

t = 0.612 s

hence, the correct answer is option (a) 0.61 s

4 0
3 years ago
Which term describes a possible explanation of, or answer to, a scientific question that is based on prior knowledge or research
suter [353]
I think it would be called a hypothesis.
3 0
3 years ago
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If the amplitude of a sound increases, which statement is true?
Aleksandr-060686 [28]
What are the options?
5 0
3 years ago
When two point charges are a distance d apart, the magnitude of the electrostatic force between them is F. If the distance betwe
EastWind [94]

Answer:

The magnitude of the electrostatic force decreases by a factor 9

Explanation:

The electrostatic force between two charges is given by:

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

where

k is the Coulomb's constant

q1 and q2 are the two charges

d is the distance between the two charges

We see that the magnitude of the force is inversely proportional to the square of the distance. If the distance is increased to 3d: d' = 3d, the new electrostatic force would be:

F'=k\frac{q_1 q_2}{(d')^2}=k\frac{q_1 q_2}{(3d)^2}=\frac{1}{9} k\frac{q_1 q_2}{d^2}=\frac{F}{9}

So, the electrostatic force decreases by a factor 9.

3 0
3 years ago
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