Physics, 13.07.2019 23:10 TrucerZ6707

The moment of inertia of a cylinder is 0.016 kg m^2 with radius 6.0 cm. (a) if the cylinder has a linear speed is 7.7 m/s, what is the magnitude of the angular momentum of the cylinder? (b) if the cylinder has a linear speed is 7.7 m/s, what is the magnitude of the rotational kinetic energy of the cylinder?

Answers: 2

Show answers

Answers

Answer from: vkyles84

The magnitude of the angular momentum of the cylinder and the rotational kinetic energy of the cylinder are 0.0205 Kgm²/s and 0.01317 J

Explanation:

Given that,

Moment of inertia = 0.016 kg m²

Radius = 6.0

Linear speed = 7.7 m/s

We need to calculate the angular momentum

Using formula of angular momentum

$L=I\omega$

Where, L = angular momentum

I = moment of inertia

$\omega$ =angular velocity

Put the value into the formula

$L=0.016\times\dfrac{7.7}{6.0}$

$L=0.0205\ Kg m^2/s$

We need to calculate the rotational kinetic energy of the cylinder

Using formula of Rotational kinetic energy

$K.E=\dfrac{1}{2}\times I\omega^2$

$K.E= \dfrac{1}{2}\times I\times(\dfrac{v}{r})^2$

$K.E= \dfrac{1}{2}\times0.016\times(\dfrac{7.7}{6.0})^2$

$K.E=0.01317\ J$

Hence, The magnitude of the angular momentum of the cylinder and the rotational kinetic energy of the cylinder are 0.0205 Kg m²/s and 0.01317 J

Answer from: Quest

most voltage drop calculators want the distance between the source and destination. then internally, they double it so both the source and return wires are calculated. but you need to know which distance the calculator uses so you're not half of what you should be or double what you should be.

most circuit breakers will not take a #6 directly, so the electrician will have to splice on a smaller pigtail. you also have to upsize the grounding wire when you upsized the ungrounded (hot) wire (see note in 250.122). this will preclude using most cable assemblies, as a cable with #6 copper will most likely only have a #10 grounding conductor. you need a #6 grounding conductor if the circuit is 20a. a #8 cable is no better, as it will have a #10 grounding conductor too. but most 20a breakers will take a #8 directly.

in your related post, you didn't say what type of load this is. if it is a light or heater, voltage drop won't be a big issue. if this is a motor, the current needs are huge at startup and the voltage drop can pose a problem. if this is a motor, knowing if the motor is under much load during startup will answer the voltage drop effect (a saw is easier to start than a compressor).

Answer from: Quest

massxgravity x heght=weightxheight= pe

4900=490xh

h=10

Other questions on the subject: Physics

Physics, 22.06.2019 00:00, izearaholland7308

What type of nuclear decay causes the atomic number of an element to increase by 1?

Answers: 1

continue

Physics, 22.06.2019 04:30, AShevel6767

In a system, when potential energy decreases, then entropy also decreases. true false

Answers: 3

continue

Physics, 22.06.2019 09:00, montgomeryaevans

This is really important 1.which of the following prefixes represents the largest value? (2 points)gigahectorkilomilli2.which of the following types of graphs is best for plotting the mean, median, and mode of data? (2 points)bar graphbox-and-whiskercircle graphstem-and-leaf

Answers: 1

continue

Physics, 22.06.2019 10:30, johnthienann58

The precision of a laboratory instrument is ± 0.05 g. the accepted value for your measurement is 7.92 g. which measurements are in the accepted range? check all that apply. 7.85 g 7.89 g 7.91 g 7.97 g 7.99 g

Answers: 1

continue

You know the right answer?

The moment of inertia of a cylinder is 0.016 kg m^2 with radius 6.0 cm. (a) if the cylinder has a li...