3 years ago

Is ice cream a solid -or is it actually a solid?

Physics

2 answers:

blondinia [14]3 years ago

6 0

It is a solid when is frozen and a liquid when it melts

zaharov [31]3 years ago

6 0

It has to be a liquid turned into a solid because if heat accurs then it turns back into a liquid

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The rotor blades of a helicopter on the ground with its engine idling rotate at 48rpm. If it takes 12s for the pilot to increase

zhannawk [14.2K]

Answer:

α = 3.59 [rad/s^2]]

Explanation:

First we have to convert the values of the angular speeds of revolutions per minute to radians on second.

wf = final angular velocity = 460 [rpm]

wo= initial velocity = 48 [rpm]

t = time = 12 [s]

$460 [\frac{rev}{min}]* [\frac{2\pi rad}{1 rev} ]*[\frac{1min}{60seg} ] = 48.17[\frac{rad}{s} ]\\48 [\frac{rev}{min}]* [\frac{2\pi rad}{1 rev} ]*[\frac{1min}{60seg} ] = 5.02[\frac{rad}{s} ]$

now we can replace, in the following equation:

$w_{o}=w_{i} +\alpha *t\\where:\\\alpha = angular acceleration [rad/s^{2}]\\replacing:\\\alpha =\frac{w_{o} -w_{i} }{t} \\\alpha alpha =\frac{48.17-5.02 }{12} \\\alpha =3.59[\frac{rad}{s^{2} } ]$

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3 years ago

A point charge q is at the point x = 0, y = 0, z = 0. An imaginary hemispherical surface is made by starting with a spherical su

VladimirAG [237]

Answer:

$282.5 N.m^2/C$

Explanation:

Use the Coulomb's law. According to it, the flux through entire sphere would be

$\phi = \frac{q}{\epsilon_o}$

where, q is the total charge enclosed in the sphere and $\epsilon_o$ is the absolute permittivity.

Thus, the flux through the hemisphere would be half of it i.e.

$\phi = \frac{q}{2\epsilon_o}\\\phi =\frac{5\times 01^{-9}}{2\times 8.85\times10^{-12}}\\\phi =282.5 N.m^2/C$

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This is not an answer I'm sorry i just need points to ask my questions

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~Hello there! ^_^

Your question: What best determines whether a borrower’s interest rate goes up or down?

Your answer: A market's condition best determines whether a borrower's interest rate goes down or up.

Hope this helps~

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3 years ago