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3 years ago

What is the term for the positive charge in an atom?

Physics

2 answers:

kotykmax [81]3 years ago

7 0

The term for the positive charge in an atom is specifically called, "A proton"

dlinn [17]3 years ago

3 0

The answer is A. Proton. Protons have the opposite charge to electrons, which have negative charges.

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What is the observed frequency of a siren with a frequency of

Yakvenalex [24]

Answer: The observed frequency is 518.6 Hz

Explanation:

By the Doppler Effect, we know that:

f' = ((v + v0)/(v - vs))*f

where f' is the perceived frequency.

v is the velocity of the wave, in this case 330m/s

v0 is the velocity of the receptor, in this case 0m/s

vs is the velocity of the source, in this case -50m/s (the minus sign is because it is coming thowards us)

f is the original frequency, f = 440hz.

then we have:

f' = 440hz*(330m/s)/(330m/s - 50m/s) = 518.6 Hz

7 0

3 years ago

The allowed energies of a simple atom are 0.0 eV, 3.0 eV, and 4.0 eV. An electron traveling at a speed of 1.3*10^6 m/s collision

ss7ja [257]

A) $5.34\cdot 10^5 m/s$

The minimum speed of the electron occurs when the electron loses the maximum energy: this occurs when the electron excites the atom from 0.0 eV to 4.0 eV, because in this case the energy given to the atom is maximum.

The energy given by the electron to the atom is equal to the difference between the two energy levels:

$\Delta E= 0.0 eV - 4.0 eV =-4.0 eV = -6.4\cdot 10^{-19}J$

This is equal to the kinetic energy lost by the electron:

$K_f - K_ i = \Delta E\\\frac{1}{2}m(v^2-u^2) = \Delta E$

where

m is the electron's mass

v is the final speed of the electron after the collision

$u=1.3\cdot 10^6 m/s$ is the speed of the electron before the collision

Solving for v, we find

$v=\sqrt{ \frac{2\Delta E}{m}+u^2}=\sqrt{\frac{2 (-6.4\cdot 10^{-19} J)}{9.11\cdot 10^{-31} kg}+(1.3\cdot 10^6 m/s)^2}=5.34\cdot 10^5 m/s$

B) $1.16\cdot 10^6 m/s$

The maximum speed of the electron occurs when the electron loses the minimum amount of energy: this occurs when the electron excites the atom from 3.0 eV to 4.0 eV, because in this case the energy given to the atom is minimum.

The energy given by the electron to the atom is equal to the difference between the two energy levels, so in this case we have:

$\Delta E= 3.0 eV - 4.0 eV =-1.0 eV = -1.6\cdot 10^{-19}J$

And so, this time the final speed of the electron after the collision will be given by:

$v=\sqrt{ \frac{2\Delta E}{m}+u^2}=\sqrt{\frac{2 (-1.6\cdot 10^{-19} J)}{9.11\cdot 10^{-31} kg}+(1.3\cdot 10^6 m/s)^2}=1.16\cdot 10^6 m/s$

3 0

3 years ago

It is made up of small particles

Allushta [10]

Answer:

Everything is made up of tiny particles called Matter

7 0

3 years ago

Read 2 more answers

Two masses, A and B, are attached to different springs. Mass A vibrates with an amplitude of 8 cm at a frequency of 10 Hz and ma

Anettt [7]

To solve this problem we will apply the concepts of speed given the simple harmonic movement, for which it defines this speed as

$v_{max} = \omega A$

Here

$\omega =$ Angular velocity

A = Amplitude

Recall that the angular velocity is equivalent in terms of the frequency at

$\omega = 2\pi f$

If we replace the value we will have then

$v_{max} = 2\pi f A$

For mass A

$v_{max,A} = 2\pi (10)(0.08) = 5.024m/s$

For mass B

$v_{max.B} = 2\pi (16)(0.05) = 5.024m/s$

Therefore they are equal.

8 0

3 years ago

What are subtomic particles

slavikrds [6]

Answer:

In the physical sciences, subatomic particles are smaller than atoms. They can be composite particles, such as the neutron and proton; or elementary particles, which according to the standard model are not made of other particles. Particle physics and nuclear physics study these particles and how they interact.

Explanation:

3 0

2 years ago

Read 2 more answers