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vlada-n [284]
3 years ago
5

A mass spectrometer accelerates doubly ionized atoms of charge 2e over a potential difference V before they enter a uniform magn

etic field B which is perpendicular to the direction of motion of the ions. If d is the radius of the ions' path in the magnetic field, what is the mass M of one ion? Express your answer ONLY in terms of V, B, e and d. The potential V is low enough that no relativistic corrections are needed
Physics
1 answer:
saul85 [17]3 years ago
3 0

Answer:

(B² x e x d²) / V  =  M

Explanation:

Under electric field by potential gradient if K is the kinetic energy imparted to

the charged particle

K = 1/2 M u² = V x 2e

When charged particle enters the magnetic field with velocity u , it travels on circular path with radius d . So

centripetal force = magnetic force

M u² / d = B x 2e x u

u = (B x 2e x d) / M

Putting this value of u in the relation above

m (B² x 4e² x d²) / 2M² = V x 2e

(B² x 4e² x d²) / V x 2e = 2 M

(B² x e x d²) / V  =  M

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Calculate the individual positive plate capacity in motive power cell that has 15 plates and a copa of 595 Ah A. 110 Ah B. 75 Ah
Sphinxa [80]

Answer:

The individual positive plate capacity is 85 Ah.

(D) is correct option.

Explanation:

Given that,

Number of plates = 15

Capacity = 595 Ah

We need to calculate the individual positive plate capacity in motive power cell

We have,

15 plates means 7 will make pair of positive and negative.

So, there are 7 positive cells individually.

The capacity will be

capacity =\dfrac{power}{number\ of\ cells}

Put the value into the formula

capacity =\dfrac{595}{7}

capacity =85\ Ah

Hence, The individual positive plate capacity is 85 Ah.

6 0
4 years ago
Read 2 more answers
An astronaut stands on the surface of an asteroid. The astronaut then jumps such that the astronaut is no longer in contact with
Anna71 [15]

(D) The gravitational force between the astronaut and the asteroid.

Reason :

All the other forces given in the options, except (D), doesn't account for the motion of the astronaut. They are the forces that act between nucleons or atoms and neither of them accounts for an objects motion.

6 0
3 years ago
Do two sound waves that seen equally loud always have the same amplitude? explain
givi [52]
No, because of that "seem" part of the question.

Your hearing system is not a linear sound detector and meter. 
Sounds with equal amplitudes at different frequencies "seem"
to have different loudness, and the differences are different
for different people.

You've probably heard the saying "Things are not always as they seem."
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3 0
3 years ago
The fastest possible rate of rotation of a planet is that for which the gravitational force on material at the equator just bare
Brums [2.3K]

Answer:

6862.96871 seconds

Explanation:

M = Mass of Planet

G = Gravitational constant

r = Radius

\rho = Density

T = Rotation period

In this system the gravitational force will balance the centripetal force

G\frac{Mm}{r^2}=mr\omega^2

\omega=\frac{2\pi}{T}.

M=\rho v\\\Rightarrow M=\rho \frac{4}{3}\pi r^3

\\\Rightarrow G\frac{Mm}{r^2}=mr\left(\frac{2\pi}{T}\right)^2\\\Rightarrow \frac{G\rho \frac{4}{3}\pi r^3}{r^3}=\frac{4\pi^2}{T^2}\\\Rightarrow T=\sqrt{\frac{3\pi}{G\rho}}

Hence, proved

T=\sqrt{\frac{3\pi}{6.67\times 10^{-11}\times 3000}}\\\Rightarrow T=6862.96871\ s

The rotation period of the astronomical object is 6862.96871 seconds

7 0
3 years ago
Why a raw egg shell disolves when submerge in vineger
quester [9]
If you soak this egg shell in vinegar (which is about 4% acetic acid), you start a chemical reaction that dissolves the calcium carbonate shell. The acetic acid reacts with the calcium carbonate in the egg shell and releases carbon dioxide gas that you see as bubbles on the shell.
6 0
4 years ago
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