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3 years ago

How does the electrostatic force compare with the strong nuclear force in the nucleus of an atom?

2 answers:

6 0

The electrostatic force is only repulsive and acts over shorter distances whereas nuclear force is strong and attractive.

Answer: C

Explanation

In an atom, the center part is known as the nucleus of the atom.

Inside the nucleus lies protons and neutrons.

Protons, the positively charged whereas neutrons have no charges but they exert masses in addition to protons.

Each proton repels from each other as they are like charges, resulting in an electrostatic force that is weak and present only in short range.

Aleks [24]3 years ago

5 0

C. The electrostatic force is only repulsive and acts over shorter distance.

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What is the formula to determine the mass of the Earth?

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Answer:

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The net force is 12 N to the left.

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2 years ago

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A 70 kg hunter, standing on frictionless ice, shoots a 42 g bullet horizontally at a speed of 590 m/s . Part A Part complete Wha

Kisachek [45]

Answer:

The recoil velocity is 0.354 m/s.

Explanation:

Given that,

Mass of hunter = 70 kg

Mass of bullet = 42 g = 0.042 kg

Speed of bullet = 590 m/s

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Using conservation of momentum

$m_{1}u_{1}+m_{2}u_{2}=m_{1}v_{1}+m_{2}v_{2}$

Where, $m_{1}$ = mass of hunter

$m_{2}$ = mass of bullet

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Put the value in the equation

$0+0=70\times v_{1}+0.042\times590$

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Hence, The recoil velocity is 0.354 m/s.

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3 years ago

The membrane that surrounds a certain type of living cell has a surface area of 5.3 x 10-9 m2 and a thickness of 1.1 x 10-8 m. A

kotykmax [81]

Answer:

$2.1\times 10^{-12} c$

Explanation:

We are given that

Surface area of membrane= $5.3\times 10^{-9} m^2$

Thickness of membrane= $1.1\times 10^{-8} m$

Assume that membrane behave like a parallel plate capacitor.

Dielectric constant=5.9

Potential difference between surfaces=85.9 mV

We have to find the charge resides on the outer surface of membrane.

Capacitance between parallel plate capacitor is given by

$C=\frac{k\epsilon_0 A}{d}$

Substitute the values then we get

Capacitance between parallel plate capacitor= $\frac{5.9\times 8.85\times 10^{-12}\times 5.3\times 10^{-9}}{1.1\times 10^{-8}}$

$C=0.25\times 10^{-12}F$

V= $85.9 mV=85.9\times 10^{-3}$

$Q=CV$

$Q=0.25\times 10^{-12}\times 85.9\times 10^{3}=2.1\times 10^{-12} c$

Hence, the charge resides on the outer surface= $2.1\times 10^{-12} c$

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3 years ago

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Atomic nuclei are made of protons and neutrons. This fact by itself shows thatthere must be some other type of force in addition

Stells [14]

Protons and neutrons are packed together in a very small region called nucleus. Protons are positively charged and we know that like charges repel. Then how is it that protons are not repelling each other and flying away from nucleus?

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It is actually strong force which holds proton together. At this short distance, strong force comes into play and is several times stronger than the repulsive force.

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3 years ago