3 years ago

A taxi is travelling at 15 m/s. Its driver accelerates with

1 answer:

6 0

If we assume that the acceleration is constant, we can use on the kinematic equations:

Vf = Vi + a*t = 15 + 3*4 = 27 m/s

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recall that heat absorbed released is given by

Q = mc*(T2 - T1)

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c = specific heat capacity (in J/g-k)

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3 years ago

A solid sphere of radius R carries a fixed, uniformly distributed charge q. Obtain an expression for the magnitude of the electr

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The electric field outside the sphere will be $\dfrac{qr}{4\pi\epsilon_{0}R^3}$ .

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Given that,

Radius of solid sphere = R

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According to figure,

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$q=\rho\times\dfrac{4}{3}\pi R^3$ .....(I)

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$\oint{\vec{E}\cdot \vec{dA}}=\dfrac{Q}{\epsilon_{0}}$

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$E\times4\pi r^2=\dfrac{qr^3}{\epsilon_{0}R^3}$

$E=\dfrac{qr}{4\pi\epsilon_{0}R^3}$

Hence, The electric field outside the sphere will be $\dfrac{qr}{4\pi\epsilon_{0}R^3}$ .

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3 years ago