Which way does the blue arrow on the earth point

Atoms in a molecule are bonded together by sharing gaining or losing_

leva [86]

Atoms and I molecule are bonded together by sharing gaining or losing electrons

5 0

3 years ago

"Two electrons in an atom are separated by 1.4 × 10−10 m, the typical size of an atom. What is the force between them? The Coulo

Rudiy27

Answer:

$F\approx 1.17551\times 10^{-8} N$

Explanation:

In order to find the force between the two electrons, we need to use Coulomb's law. In its scalar form, the law is given by:

$F=k_c \frac{q_1*q_2}{r^2}$

Where:

$k_c=Coulomb\hspace{3}constant\approx 9\times10^{9} \frac{Nm^2}{C^2} \\q_1\hspace{3}and\hspace{3}q_2=Magnitudes\hspace{3}of\hspace{3}the\hspace{3}charges\\r=Distance\hspace{3}between\hspace{3}the\hspace{3}charges$

The electric charge of an electron is a known constant given by:

$q_e \approx -1.6 \times 10^{-19} C$

So:

$q_1=q_2=q_e \approx -1.6 \times 10^{-19} C$

Therefore, replacing the data provided in the Coulomb's law equation:

$F=(9\times 10^{9})\frac{(-1.6\times 10^{-19})*(-1.6\times 10^{-19})}{(1.4\times 10^{-10})^2} =1.175510204\times10^{-8} \approx 1.17551\times10^{-8}N$

8 0

3 years ago

An AC source is rated 220 V, 50 Hz. The average voltage is calculated in a time interval of o.01 s. It (A) must be zero (C) is n

dimaraw [331]

ANSWER AND EXPLANATION:

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INFORMATION

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Frequency - 50Hz. Which means that the time period of the wave if 1/50 = 0.02 sec. Here we are going to check the average voltage for the time interval of 0.01sec. If the interval lies between π/2 to 3π/2. the average voltage will be zero. In all the other cases it will not be zero

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ANSWER

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So, the answer will be <u><em>may be zero. </em></u>

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HOPE THIS HELPS PLEASE MARK ME BRAINLIEST THANK YOU!

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6 0

3 years ago

Which of the following is not a physical property of mattera. melting pointb.heat of combustionc. viscosityd. boiling point

NNADVOKAT [17]

Answer:

The Correct Answer is Heat of Combustion

Explanation:

6 0

3 years ago

A cheetah ran 300 feet in 2.92 seconds. What was the cheetah’s average speed in miles per hour?

olganol [36]

We will first convert feet to miles:
1 foot = 0.00018939 miles
300 foot = 0.056817 miles
Than seconds to hours:
2.92 seconds = 0.04867 minutes = 0.0008111 hours
Average speed :
v = d / t
v = 0.056817 miles / 0.008111 h
v = 70.05 miles per hour

6 0

3 years ago