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Nostrana [21]
3 years ago
7

The atomic nucleus contains two subatomic particles, the proton and the neutron. Atoms of different elements have different numb

ers of protons and neutrons. The nuclei of atoms that are the most stable have proton to neutron ratios of:
A) 1 to 1
B) 2 to 1
C) 1 to 2
D) there is no pattern that indicates stability in the nucleus
Physics
2 answers:
9966 [12]3 years ago
7 0
The answer is option A .

Step2247 [10]3 years ago
5 0

the correct answer is the letter A)1 to 1

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If cats always land on their feet, how do they get hurt when they fall?
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A cyclist is riding a bicycle at a speed of 22 mph on a horizontal road. The distance between the axles is 42 in., and the mass
stealth61 [152]

Answer:

The shortest distance is  S = 24.86 ft

Explanation:

The free body diagram of this question is shown on the first uploaded image

From the question we are told that

   The speed of the bicycle is v_b = 22\ mph = 22 * \frac{5280}{3600}   =  32.26 ft/s

     The distance between the axial is  d = 42 \ in

The mass center of the cyclist and the bicycle is m_c = 26 \ in  behind the front axle

The mass center of the cyclist and the bicycle is m_h = 40 \ in above the ground

   For the bicycle not to be thrown over the

     Momentum about the back wheel must be zero so

                \sum _B = 0

=>             mg (26) = ma(40)

=>             a = \frac{26}{40} g

Here  g = 32.2 ft/s^2

     So     a =  \frac{26}{40} (32.2)

             a =  20.93 ft/s^2

Apply the equation of motion to this motion we have

       v^2 = u^2 + 2as

 Where  u = 32.26 ft /s

             and v = 0 since the bicycle is coming to a stop

        v^2 = (32.26)^2 - 2(20.93) S

=>      S = 24.86 ft        

                 

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mgh

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=73, 500

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