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3 years ago

10

Why do atoms have an overall neutral charge?

2 answers:

lbvjy [14]3 years ago

7 0

Answer:

Explanation:

An atom has equal number of protons and electrons. The charge of an electron and a proton is same but opposite in nature. So, the total charge on the atom is zero and thus an atom is said to be neutral.

Y_Kistochka [10]3 years ago

6 0

Atoms have an overall charge that is neutral because atoms have equal number of positive protons and negative electrons thus they cancel each other out. This always true for atoms that are stable and in equilibrium.

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The answer can't be D because I got it wrong when I took my test so it has to be A,B,or C

Cerrena [4.2K]

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3 years ago

What difference will you get from the flying or air filled balloon and the hydrogen filled balloon.

mash [69]

Answer:

the hydrogen filled balloon is denser than the air filled balloon

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3 years ago

A river flows due south with a speed of 2.0 m/s. You steer a motorboat across the river; your velocity relative to the water is

neonofarm [45]

Answer:

a) 25.5°(south of east)

b) 119 s

c) 238 m

Explanation:

solution:

we have river speed $v_{r}$ =2 m/s

velocity of motorboat relative to water is $v_{m/r}$ =4.2 m/s

so speed will be:

a) $v_{m}$ = $v_{r}$ + $v_{m/r}$

solving graphically

$v_{m}=\sqrt{v^2_{r}+v^2_{m/r}}$

=4.7 m/s

Ф= $tan^{-1} (\frac{v_{r}}{v_{m/r}} )$

=25.5°(south of east)

b) time to cross the river: t= $\frac{w}{v_{m/r}}$ = $\frac{500}{4.2}$ =119 s

c) d= $v_{r}t$ =(2)(119)=238 m

note :

pic is attached

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3 years ago

What do butterflies have on their feet which allows them to sense different strengths and types of nectar?

Andru [333]

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3 years ago

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It is determined that a certain wave of infrared light has a wavelength of 8.45 mm. Given that c=2.99 ×108 m/s, what is the freq

irina [24]

Answer:

The frequency of infrared wave is 35.385 GHz

Explanation:

Given data:

Wavelength of infrared light = 8.45 mm = 8.45 x $10^{-3}$ m

Velocity of infrared light = 2.99 x $10^{8}$ m/s

To find: frequency of the infrared wave = ?

We know that the wavelength and frequency are inversely proportional and the formula to derive frequency with velocity and wavelength is:

c = μλ, where

c is velocity of light

μ is frequency of light

λ is wavelength of light

Hence the frequency of light μ = c/λ

= $\frac{2.99 x 10^{8} m/s }{8.45 x 10^{-3}m }$

= $\frac{299}{8.45}$ x $10^{9}$ $s^{-1}$

= 35.385 x $10^{9}$ Hz (since 1 $s^{-1}$ = 1 Hz)

= 35.385 GHz

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3 years ago

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