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2 years ago

Question - Does gum affect a student's performance in school?

1 answer:

3 0

Independent variable: the interdependent variable in this example, could be a number of things but the main one is what type of brand is the gum and what kind is it.

Dependent variable: the dependent variable is what you are trying to find so in this case, you are trying to find does gum affect a student's performance.This is the Dependent variable.

Hope I helped!

Have a nice day,

scollier1607

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What is the number of waves per second in a radio signal?

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The answer is B I think

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The frequency of the middle d note on a piano is 293.66 hz. what is the wavelength of this note in centimeters? the speed of sou

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The relationship between speed, frequency and wavelength of a wave is:
$v=\lambda f$
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In our problem, the frequency of the middle d note is f=293.66 Hz, while the speed of the wave (which is a sound wave) is v=343.06 m/s. Using the previous relationship, we can find the wavelength:
$\lambda= \frac{v}{f} = \frac{343.06 m/s}{293.66 Hz}=1.168 m$

Converting into centimeters, we have:
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A small box slides off a table top which is 0.875 m above the floor. The box hits the floor 0.452 m from the edge of the table.

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2 years ago

It is well known that for a hollow, cylindrical shell rolling without slipping on a horizontal surface, half of the total kineti

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<u>The fraction of the total kinetic energy that is rotational for a uniform sphere is</u><u> 1/3.</u>

<h3>What is kinetic energy?</h3>

Kinetic energy is a form of energy that an object or a particle has by reason of its motion.
If work, which transfers energy, is done on an object by applying a net force, the object speeds up and thereby gains kinetic energy.

Option (a) $f = \frac{0.5}{1.5} = \frac{1}{3}$

Option (b) uniform sphere

$f = \frac{2}{7}$

C) uniform hollow sphere

$f = \frac{2}{5}$

D) uniform hollow cylinder with inner radius R/2 and outer radius R

$f = \frac{5}{13}$

that fraction of total energy as rotational energy is given as

$f = \frac{\frac{1}{2}Iw^{2} }{\frac{1}{2}mv^{2} + \frac{1}{2} Iw^{2} }$

$f = \frac{m k^{2}(\frac{v^{2} }{R^{2} }) }{mv^{2} + m k^{2}(\frac{v^{2} }{R^{2} } )}$

$f = \frac{\frac{k^{2} }{R^{2} } }{1 + \frac{k^{2} }{R^{2} } }$

A) uniform Solid cylinder for cylinder we know that

$\frac{k\\ ^{2} }{R^{2} }$ = 0.5

$f = \frac{0.5}{1.5} = \frac{1}{3}$

B) uniform Sphere for sphere we know that

$\frac{k^{2} }{R^{2} } = \frac{2}{5} \\$

$f = \frac{0.4}{1.4} = \frac{2}{7}$

C) uniform hollow sphere for hollow sphere we know that

$\frac{k^{2} }{R^{2} } = \frac{2}{3}$

$f = \frac{\frac{2}{3} }{\frac{5}{3} } = \frac{2}{5}$

D) uniform hollow cylinder with inner radius R/2 and outer radius R for annular cylinder

$\frac{k^{2} }{R^{2} } = \frac{5}{8}$

$f = \frac{\frac{5}{18} }{\frac{13}{8} } = \frac{5}{13}$

Learn more about kinetic energy

brainly.com/question/999862

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<u />

<u>The complete question is -</u>

It is well known that for a hollow, cylindrical shell rolling without slipping on a horizontal surface, half of the total kinetic energy is translational and half is rotational. What fraction of the total kinetic energy is rotational for the following objects rolling without slipping on a horizontal surface?Part AA uniform solid cylinder.Part BA uniform sphere.Part CA thin-walled hollow sphere.Part DA hollow, cylinder with outer radius R and inner radius R/2.

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Well you know how it

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