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3 years ago

What is the heart rate recorded a few minutes after completing a workout?

Physics

2 answers:

DochEvi [55]3 years ago

8 0

Correct answer should be C

Naily [24]3 years ago

5 0

The answer is D, recovery heart rate

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(a) If a proton with a kinetic energy of 6.2 MeV is traveling in a particle accelerator in a circular orbit with a radius of 0.5

Tju [1.3M]

Answer:

The fraction of its energy that it radiates every second is $3.02\times10^{-11}$ .

Explanation:

Suppose Electromagnetic radiation is emitted by accelerating charges. The rate at which energy is emitted from an accelerating charge that has charge q and acceleration a is given by

$\dfrac{dE}{dt}=\dfrac{q^2a^2}{6\pi\epsilon_{0}c^3}$

Given that,

Kinetic energy = 6.2 MeV

Radius = 0.500 m

We need to calculate the acceleration

Using formula of acceleration

$a=\dfrac{v^2}{r}$

Put the value into the formula

$a=\dfrac{\dfrac{1}{2}mv^2}{\dfrac{1}{2}mr}$

Put the value into the formula

$a=\dfrac{6.2\times10^{6}\times1.6\times10^{-19}}{\dfrac{1}{2}\times1.67\times10^{-27}\times0.51}$

$a=2.32\times10^{15}\ m/s^2$

We need to calculate the rate at which it emits energy because of its acceleration is

$\dfrac{dE}{dt}=\dfrac{q^2a^2}{6\pi\epsilon_{0}c^3}$

Put the value into the formula

$\dfrac{dE}{dt}=\dfrac{(1.6\times10^{-19})^2\times(2.3\times10^{15})^2}{6\pi\times8.85\times10^{-12}\times(3\times10^{8})^3}$

$\dfrac{dE}{dt}=3.00\times10^{-23}\ J/s$

The energy in ev/s

$\dfrac{dE}{dt}=\dfrac{3.00\times10^{-23}}{1.6\times10^{-19}}\ J/s$

$\dfrac{dE}{dt}=1.875\times10^{-4}\ ev/s$

We need to calculate the fraction of its energy that it radiates every second

$\dfrac{\dfrac{dE}{dt}}{E}=\dfrac{1.875\times10^{-4}}{6.2\times10^{6}}$

$\dfrac{\dfrac{dE}{dt}}{E}=3.02\times10^{-11}$

Hence, The fraction of its energy that it radiates every second is $3.02\times10^{-11}$ .

5 0

3 years ago

Balance the following equations: CUCO3+H2SO4- CUSO4+H2O+CO2

Setler79 [48]

Answer:

It is already balanced

Explanation:

It is already balanced

6 0

3 years ago

The term ________ commonly is used to refer to a string that is part of another string.

Soloha48 [4]

Commonly is used to refer to a string that is part of another string.its a substring

8 0

4 years ago

Scarcity exists because there are limited resources to meet unlimited wants and needs. true or false.

Sedbober [7]

The answer is true. scarcity exists because the resources are being depleted to meet the increasing demands of the people

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3 years ago

Read 2 more answers

Which of the following is a form of kinetic energy?

Fudgin [204]

Answer:

hope this helps.

Explanation:

______

5 0

3 years ago