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Georgia [21]
3 years ago
15

A neutral atom as the same number of protons and electrons.

Physics
1 answer:
ZanzabumX [31]3 years ago
6 0

That is correct. Or so I believe. Either more or less than the other on the amount of protons and electrons, you can get either an unstable or a stable atom of an element.

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Two trolleys are moving in the same direction along a track. Trolley 1 has a momentum of 2 kg m/s and Trolley 2 has a momentum o
motikmotik

Hi there!

Recall the conservation of momentum:

\large\boxed{m_1v_1 + m_2v_2 = m_1v_1' + m_2v_2'}}

For this type of inelastic collision:

\large\boxed{m_1v_1 + m_2v_2 = v_f(m_1 + m_2)}}

Thus, the initial momentum equal the final momentum if there are no external forces.

We can begin by writing out this problem:

2 + 6 = v_f(m_1 + m_2)

8 = 2(m_1 + m_2)\\\\m_1 + m_2 = \boxed{4 kg}

8 0
2 years ago
Which pair of forces will give a resultant of the least value? (5
kkurt [141]

Answer:

B

Explanation:

It will give the of 6 which is least of all the other forces.

4.0²+4.0² = c²

\sqrt{32}  =  \sqrt{c^{2} }

6 = c

3 0
3 years ago
Which of these would have particles with the highest kinetic energy? Ice Water Water Vapor
umka2103 [35]
<h2>Answer:</h2>

The correct answer is water vapor.

<h3>Explanation:</h3>
  • In evaporation of water, particles with high kinetic energy tend to leave the water surface.
  • Because high kinetic energy molecules move faster than others breaking bonds with other molecules.
  • And escape the water to air in form of vapors.
  • While the ice water contain molecules with low kinetic energy.

7 0
3 years ago
Read 2 more answers
What is the wavelength of visible light emitted at 4.2 x 10^8 Answer in units of M
Ber [7]

Answer:

0.714 m

Explanation:

From the question,

v = λf......................... Equation 1

Where v = velocity of visible light, f = frequency of visible light, λ = wave length of visible light.

make λ the subject of the equation

λ = v/f.................. Equation 2

Given: f = 4.2×10⁸ Hz

Note: Light is an electromagnetic wave, and all electromagnetic waves travels with the same speed (3×10⁸ m/s)

Constant: v = 3×10⁸ m/s

Substitute these values into equation 2

λ = 3×10⁸/4.2×10⁸

λ = 0.714 m

8 0
3 years ago
During a testing process, a worker in a factory mounts a bicycle wheel on a stationary stand and applies a tangential resistive
olganol [36]

Answer:

The force is     F_c  =  789.03 \  N    

Explanation:

From the question we are told that

   The tangential  resistive force is F_t  =   115 \ N

   The mass of the wheel is  m  = 1.80 kg

  The diameter of the wheel is  d =  50.0 cm  = 0.5 \ m

   The diameter of the sprocket is  d_c  =  8.50 \ cm =0.085 \ m

  The angular acceleration considered is  \alpha  =  4.30\ rad/s^2

Generally the radius of the wheel is

       r = \frac{d}{2}

=>     r = \frac{0.5}{2}

=>     r = 0.25 \ m

Generally the radius of the sprocket is

       r_c = \frac{d_c}{2}

=>     r_c = \frac{0.085}{2}

=>     r_c = 0.0425 \ m

Generally the moment of inertia of the wheel is mathematically represented as

      I  =  m  *  r^2

=>    I  =  1.80  *  0.25^2

=>    I  = 1.1125 \ kg \cdot m^2

Generally the torque experienced by the wheel due to the forces acting on it  is mathematically represented as

      \tau =  F_c *  r_c  -  F_t  * r

Here  F_c is the force acting on the sprocket

So  

      \tau =  F_c *  0.0425 - 115  * 0.25

       \tau = 0.0425F_c  -  28.75

Generally the torques that will cause the wheel to move with \alpha  =  4.30\ rad/s^2 is mathematically represented as

       \tau  =  I  * \alpha

So

        0.0425F_c  -  28.75  =   I  * \alpha

        0.0425F_c  -  28.75  =   1.1125  *4.30    

       0.0425F_c  -  28.75  =   1.1125  *4.30    

        F_c  =  789.03 \  N    

5 0
3 years ago
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