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12345 [234]
3 years ago
9

Why should a chemical equation be balanced? A. to show ionic compounds B. to show metals from nonmetals C. to show the law of co

nservation of mass D. to show that the reactants are compounds
Physics
1 answer:
yKpoI14uk [10]3 years ago
3 0

Answer:

b

Explanation:

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Two particles having charges of 0.440 nC and 11.0 nC are separated by a distance of 1.80 m . 1) At what point along the line con
Harlamova29_29 [7]

Answer:

a) 0.3 m

b) r = 0.45 m

Explanation:

given,

q₁ = 0.44 n C   and q₂ = 11.0 n C

assume the distance be r from q₁  where the electric field is zero.

distance of point from q₂  be equal to 1.8 -r

now,

        E₁ = E₂

\dfrac{K q_2}{(1.8-r)^2} = \dfrac{K q_1}{r^2}

(\dfrac{1.8-r}{r})^2= \dfrac{q_2}{q_1}

\dfrac{1.8-r}{r}= \sqrt{\dfrac{11}{0.44}}

1.8 = 6 r

r = 0.3 m

<h3>b) zero when one charge is negative.</h3>

let us assume  q₁  be negative so, distance from  q₁ be r

from charge q₂ the distance of the point be 1.8 +r

now,

   E₁ = E₂

\dfrac{K q_2}{(1.8+r)^2} = \dfrac{K q_1}{r^2}

(\dfrac{1.8+r}{r})^2= \dfrac{q_2}{q_1}

\dfrac{1.8+r}{r}= \sqrt{\dfrac{11}{0.44}}

1.8 =4 r

r = 0.45 m

4 0
3 years ago
The picture to the right shows which wave behavior?
kifflom [539]

Answer:

It is refraction

Explanation:

6 0
3 years ago
Read 2 more answers
The radiation per unit area from the Sun reaching the earth is 1400 W/m2 , approximately the amount of radiative power per unit
natka813 [3]

Answer:

83.2 W/m^2

Explanation:

The radiation per unit area of a star is directly proportional to the power emitted, which is given by Stefan-Boltzmann law:

P=\sigma A T^4

where

\sigma is the Stefan-Boltzmann constant

A is the surface area

T is the surface temperature

So, we see that the radiation per unit area is proportional to the fourth power of the temperature:

I \propto T^4

So in our problem we can write:

I_1 : T_1^4 = I_2 : T_2^4

where

I_1 = 1400 W/m^2 is the power per unit area of the present sun

T_1 = 5800 K is the temperature of the sun

I_2 is the power per unit area of sun X

T_2 = 2864 K is the temperature of sun X

Solving for I2, we find

I_2 = \frac{I_1 T_2^4}{T_1^4}=\frac{(1400 W/m^2)(2864 K)^4}{(5800 K)^4}=83.2 W/m^2

6 0
3 years ago
A car traveling at 100km/hr .how many hours will it take to cover a distance of 750 km
grin007 [14]

Answer:

7.5 right?

Explanation: if im wrong shoot me

4 0
3 years ago
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How does your education contribute to comunity development
Angelina_Jolie [31]
Because everybody in community needs to be smart & have some type of knowledge
4 0
3 years ago
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