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2 years ago

The velocity of an object is it’s speed and __ of motion .

Physics

2 answers:

Afina-wow [57]2 years ago

4 0

Velocity i’m pretty sure

borishaifa [10]2 years ago

3 0

Answer:

direction should be the answer

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How long will it take this wave to travel 3000 m in the x-direction?

REY [17]

2.4 secs I think

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5 0

2 years ago

Consider an electron with charge −e and mass m orbiting in a circle around a hydrogen nucleus (a single proton) with charge +e.

alexandr1967 [171]

Answer:

$v=\sqrt{k\frac{e^2}{m_e r}}$ , $2.18\cdot 10^6 m/s$

Explanation:

The magnitude of the electromagnetic force between the electron and the proton in the nucleus is equal to the centripetal force:

$k\frac{(e)(e)}{r^2}=m_e \frac{v^2}{r}$

where

k is the Coulomb constant

e is the magnitude of the charge of the electron

e is the magnitude of the charge of the proton in the nucleus

r is the distance between the electron and the nucleus

v is the speed of the electron

$m_e$ is the mass of the electron

Solving for v, we find

$v=\sqrt{k\frac{e^2}{m_e r}}$

Inside an atom of hydrogen, the distance between the electron and the nucleus is approximately

$r=5.3\cdot 10^{-11}m$

while the electron mass is

$m_e = 9.11\cdot 10^{-31}kg$

and the charge is

$e=1.6\cdot 10^{-19} C$

Substituting into the formula, we find

$v=\sqrt{(9\cdot 10^9 m/s) \frac{(1.6\cdot 10^{-19} C)^2}{(9.11\cdot 10^{-31} kg)(5.3\cdot 10^{-11} m)}}=2.18\cdot 10^6 m/s$

7 0

2 years ago

Answer the following questions. 3 A student runs 2 m/s. What does this mean? <br>

natka813 [3]

Answer:

2ms-¹ means that the body under consideration moves 2m in a second, and may be it will continue to move 2m in every 1 second, if there's no external unbalanced force acting on that body (those forces do include frictional forces). mark its brainlist plz. Kaneppeleqw and 6 more users found this answer helpful. Thanks 3.

6 0

2 years ago

Read 2 more answers

A disk with a hole has inner radius rin and outer radius rout. the disk is uniformly charged with total charge q. find an expres

Effectus [21]

Here it is. I used the surface charge density σ as q/Area, and then wrote it out in terms of q at the end