How will a positive and a negative charge react to each other?

1 answer:

5 0

Objects with like charge repel each other; meanwhile objects with opposite charge with attract each other.

Ex: A positive and positive charge will push apart and a positive and a negative charge will push together.

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Two spaceships that have different masses but rocket engines of identical force are at rest in space. if they fire their rockets

NISA [10]

Force is calculated F=m×a.
If both ships speed up with the same force, but have a different mass, This means that a also has to be different. If F is the same but ship a has a bigger mass(m) than ship b, then the acceleration(a) of ship b has to be bigger so F of each ship is the same. So the ship with the smaller mass will speed up faster.

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3 years ago

A grasshopper jumps at a 65.0 degree angle at 5.42m/s. At what time does it reach its maximum height?

crimeas [40]

When the grasshoppers vertical velocity is exactly zero.
v = -g•t + v0.
v: vertical part of velocity. Is zero at maximum height.
g: 9.81
t: time you are looking for
v0: initial vertical velocity
Find the vertical part of the initial velocity, by using the angle at which the grasshopper jumps.

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3 years ago

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The molecule arrangement of ice, water and steam are very different. _______ has the most ordered arrangement, ______ has the ne

Elis [28]

<u>Answer </u>

A) Ice, water, steam

<u>Explanation </u>

Ice is inform of a solid. Solids have particles that are tightly packed and they are in a regular pattern. For this reason they have the most ordered arrangement.

Water is a liquid. It has particles that are closely together but they are not in regular arrangement. For this reason they are next after ice.

Steam is in gaseous state. Gases have particles that are well separated with no definite arrangement. Hence they are the least in the order of molecule arrangement.

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3 years ago

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8_murik_8 [283]

Answer: 2.61 s

Explanation:

We are given the following data:

$s=5 ft$ is the initial height of the object

$v=40 ft/s$ is the initial height of the object

In addition, the motion of the object is given by:

$h=-16t^{2}+ vt +s$ (1)

Where:

$h=0 ft$ is the final height of the object

$t$ is the time the object is in the air before hitting the ground

Rewritting (1) with the given data:

$0=-16t^{2}+ 40t +5$ (2)

Solving the quadratic equation with the quadratic formula $t=\frac{-b\pm\sqrt{b^{2}-4ac}}{2a}$ , where $a=-16$ , $b=40$ , $c=5$ and choosing the positive value of time: