Physics, 20.07.2020 01:01 didi2096

To study the properties of various particles, you can accelerate the particles with electric fields. A positron is a particle with the same mass as an electron but the opposite charge ( e). Express your answer in vector form. Do not enter units in your expression. Required:
a. If a positron is accelerated by a constant electric field, find the acceleration of the positron.
b. Assuming the positron started from rest, find the velocity of the positron

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Answer from: markmoroney22

a) a = + 1,758 10¹¹ m / s , b) = √ (2 1,758 10¹¹ E x)

Explanation:

a) A charged particle is an electric field undergoing force given by the expression

F = qE

where q is the charge of the paticle and E electric field.

In this case we are told that the particle is positron

q = + 1.6 10⁻¹⁹ C

let's calculate the force

F = + 1.6 10⁻¹⁹ E

we write the positive sign, to show that the particle accelerates in the same direction of the electric field

let's write Newton's second law to find the acceleration

F = ma

a = F / m

a = + 1.6 10-19 / 9.1 10-31 E

a = + 1,758 10¹¹ m / s

b) the velocity of the particle starting from rest

v² = v₀² + 2 a x

v = √ (2 1,758 10¹¹ E x)

Answer from: Quest

Is a vector quantity that refers to "the rate at which an object changes its position." imagine a person moving rapidly - one step forward and one step back - always returning to the original starting position. while this might result in a frenzy of activity, it would result in a zero velocity. because the person always returns to the original position, the motion would never result in a change in position. since velocity is defined as the rate at which the position changes, this motion results in zero velocity. if a person in motion wishes to maximize their velocity, then that person must make every effort to maximize the amount that they are displaced from their original position. every step must go into moving that person further from where he or she started. for certain, the person should never change directions and begin to return to the starting position.

Answer from: Quest

the answer is the first electromagnet (a). this is because it has more coils around the ferromagnetic material. increasing the number of coils increases the surface area in which the metal interacts with the current in the coil. this enables more atoms in the metal to become aligned hence becoming more magnetized.

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To study the properties of various particles, you can accelerate the particles with electric fields....

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