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satela [25.4K]
3 years ago
9

How much work must be done on an electron to accelerate it from rest to a speed?

Physics
1 answer:
anzhelika [568]3 years ago
5 0
You haven't provided a final speed, therefore, I cannot provide a specific answer.
However, I will try to help you out.

Work can be considered as the change in kinetic energy. Therefore, the amount of work needed can be calculated by getting the difference between the final energy and the initial one.

Final energy = α * m * c²
where:
α = \frac{1}{ \sqrt{1- \frac{v^2}{c^2} } } where v is the final speed reached

Initial energy = m * c²

The difference between the two will simply be the answer you want

Hope this helps :)

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What is the period of a pendulum that takes 3 seconds to move forward, and another 3 seconds to come back?
Serga [27]

The period of the pendulum is 6 seconds.

<h3>What is period?</h3>

Period is the time taken for a simple pendulum to move to(forward) and fro(backward). The s.i unit of period is seconds(s).

Note: When a simple pendulum moves to and fro. it completes one cycle.

From the question, The period of the pendulum is calculated using the formula below.

<h3>Formula</h3>
  • T = a+b.............. Equation 1

Where:

  • T = Period of the pendulum
  • a = Time taken for the pendulum to move forward
  • b = Time taken for the pendulum to move backward.

From the question,

Given:

  • a = 3 seconds
  • b = seconds

Substitute the values above into equation 1

  • T = 3+3
  • T = 6 seconds.

Hence, The period of the pendulum is 6 seconds.

Learn more about period here: brainly.com/question/21924087

5 0
3 years ago
does it require more energy to brew 12 cups with the coffee-maker or reheat 12 cups of coffee in a microwave?
Leni [432]
It would take more energy to reheat 12 cups because only 1 or 2 cups can fit in a microwave rather an than brewing 12 cups in a coffee pot.


6 0
3 years ago
Read 2 more answers
One of the heating systems we talked about in this course comprises of a system of ducts. What is the process by which heat is t
madreJ [45]

Answer: b- covection

Explanation:

Conduction: It is the circulation or transfer of heat through a metal or solid. For example, heat generated inside an enclosure can be transferred to the outer surface by means of conduction.so therefore conduction can not be the answer.

Convection is the circulation or tansfer of heat from a surface by means of a fluid such as air. Natural convection happens when air is heated: it expands, rises, and is replaced by cooler air. The amount of convection may be increased by using a fan to increase the flow of air.Likewise,Ducts are used to circulate air in the system. Since, air is circulated in the system, heat is transfered by convection.Hence,the answer is B-convection.

Radiation: Here, energy is radiated through the air by means of electromagnetic radiation. Since heat transfer through raidation does not involve contact between the heated object and the heated source,so energy is lost as light or through electromagnetic radiation. So C is wrong.

7 0
3 years ago
If the distance between the plates is doubled, it's capacitance...
meriva
I’m almost sure it’s b , hope this helps on cripwalker
8 0
3 years ago
What tells you the strength of a wave?​
castortr0y [4]
The first factor is wind speed, the second factor is wind duration, and the last factor is the fetch, the distance over which the wind blows without a change in direction.

all these factors determines the strength of a wave.

hope this helps :)
3 0
3 years ago
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