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Stels [109]
2 years ago
15

a proton moves in a circle of radius 0.4 when it enters a region with a magnetic field of 1.0t which points into the plane the s

peed of the proton is
Physics
1 answer:
Genrish500 [490]2 years ago
8 0

Answer:

4 x 10⁷m/s

Explanation:

When a charged particle moves in a curved path in a magnetic field, it experiences some magnetic force, and in the absence of any other force, which supplies the centripetal force needed to keep the particle in balance.

Let the magnetic force be F_{M}

Let the centripetal force be F_{C}

=> F_{M} = F_{C}           --------------(i)

We know that;

F_{M} = qvBsinθ

Where;

q = charge on the particle

v = speed of the particle

B = magnetic field intensity

θ = angle between the speed and magnetic field vectors

Also;

F_{C} = \frac{mv^2}{r}

Where;

m = mass of the particle

v = velocity/speed of the particle

r = radius of the circular path of motion.

From equation (i)

qvBsinθ = \frac{mv^2}{r}           [divide both sides by v]

qBsinθ = \frac{mv}{r}              [make v subject of the formula]

v = qrBsinθ / m            --------------------(ii)

From the question;

B = 1.0T

r = 0.4m

θ = 90°     [since magnetic field is always perpendicular to velocity]

q = 1.6 x 10⁻¹⁹C        [charge of a proton]

m = 1.6 x 10⁻²⁷kg        [mass of a proton]

Substitute these values into equation(ii) as follows;

v = (1.6 x 10⁻¹⁹ x 0.4 x 1.0 x sin90°) /  (1.6 x 10⁻²⁷)

v = 4 x 10⁷ m/s

Therefore the speed of the proton is 4 x 10⁷m/s

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Explanation:

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Converting to tonnes/m³:

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ρ = 4.1 tonne/m³

Rounding to one significant figure, the density is 4 tonne/m³.

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Consider two waves X and Y traveling in the same medium. The two carry the same amount of energy per unit time, but X has one-se
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3 years ago
WILL GIVE BRAINLIEST TO CORRECT ANSWER PLEASE HELP ME
koban [17]

Answer:

The total distance is 381.5 [m]

Explanation:

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v_{f} =v_{o} +(a*t)

where:

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v_{f} ^{2} =v_{o} ^{2} +2*a*x

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The other important clue to solve this problem in the second part is that the final velocity is now the initial velocity.

We must calculate the final velocity.

v_{f}= v_{i} +(a*t)

Vf = final velocity [m/s]

Vi = initial velocity = 14 [m/s]

a = desacceleration = 4 [m/s²]

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Vf = 24 + (4*8)

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With this velocity, we can calculate the displacement using the following expression.

v_{f} ^{2} =v_{o} ^{2} +2*a*x

where

x = distance traveled [m]

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x = 2940/(8)

x = 367.5 [m]

Note: The positive sign in the equations is because the car is accelerating, it means its velocity is increasing.

Therefore the total distance is Xt = 14 + 367.5 = 381.5 [m].

4 0
3 years ago
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As velocity is in m/s and time is in s so the unit of area is m

Hence, the total distance is  1300m.

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