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Ivan
3 years ago
5

What is the electrostatic force between and electron and a proton separated by 0.1 mm? 2.3 × 10^-20N, attractive.

Physics
1 answer:
Ad libitum [116K]3 years ago
6 0

Answer:

2.3 × 10⁻²⁰ N, attractive

Explanation:

An electron has a negative charge and a proton has a positive charge. Opposite charges attract each other. We can calculate the magnitude of this attractive force (F) using Coulomb's law.

F=k.\frac{q_{1}\times q_{2}}{r^{2} }

where,

k: Coulomb's constant

q: charges

r: distance

F=k.\frac{q_{1}\times q_{2}}{r^{2} }=8.99 \times 10^{9}N.m^{2}.C^{-2} \frac{(1.6 \times 10^{9}C)^{2} }{(0.1 \times 10^{-3}m)^{2} } =2.3 \times 10^{-20}N

The modulus of the force is 2.3 × 10⁻²⁰ N.

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Question 10(Multiple Choice Worth 7 points)
nataly862011 [7]

Organisms that existed over a limited period

Explanation:

Index fossils are organisms that existed within a limited period in the geologic record.

These fossils are indicator fossils that serves as guide to define the relative ages of rocks in a sequence.

Here are some characteristics of index fossils:

  • they must have existed over a limited period in their history.
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  • they must be abundant and highly widespread in the stratigraphic column.

Learn more:

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5 0
3 years ago
Modern human lifestyle depends on fossil fuels to generate electricity. Predict and explain the long term effect on the environm
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3 0
3 years ago
Question#7:a) A television uses 1500J of electric energy to produce 1100J 1 point
Vesnalui [34]

Answer:

a.73.3%

b.26.6%

Explanation:

a. The efficiency is the energy output, divided by the energy input, and expressed as a percentage.

#Given the energy input as 1500J and the subsequent output as 1100J, the TV's efficiency is calculated as:

<em />\eta=\frac{E_o}{E_i}\\\\=\frac{1100}{1500}\times 100\%\\\\=73.33\%<em />

Hence, the TV has an efficiency of 33.3%

b. From a above, we know that the TV has an output of 1100J and input of 1500J.

-We therefore calculate it's wastage as the difference between output and input:

<em>Wastage=Energy Input-Energy Output=1500J-1400J=400J</em>

<em />E_w=\frac{E_{wasted}}{E_i}\times 100\%\\\\=(400/1500)\times100\%\\\\=26.67\%<em />

Hence, the TV has wasted of 26.6%

4 0
3 years ago
Help me pleaseee, it’s due today: Two people push on a large gate as shown on the view from above in the diagram. If the moment
Sladkaya [172]

Answer:

the angular acceleration of the gate is approximately 1.61  \frac{rad}{s^2}

Explanation:

Recall the formula that connects the net torque with the moment of inertia of a rotating object about its axis of rotation, and the angular acceleration (similar to Newton's second law with net force, mass, and linear acceleration):

\sum \tau_1=I\,\alpha

In our case, both forces contribute to the same direction of torque, so we can add their torques up and get the net torque on the gate:

\tau_{net}=(20*2+30*3.5) \,N\,m=145\,\,N\,m

Now we use this value to obtain the angular acceleration by using the given moment of inertia of the rotating gate:

\sum \tau_1=I\,\alpha\\145\,\,N\.m=(90\,\,kg\,m^2)\,\alpha\\\alpha= \frac{145}{90} \frac{rad}{s^2} = 1.61\, \frac{rad}{s^2}

4 0
2 years ago
What are 2 things that legal immigrants can NOT do.
Alexandra [31]
One thing they can’t do is go somewhere out of their country
7 0
2 years ago
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