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Natali5045456 [20]

3 years ago

6

Which of the following is true regarding the Earth's mantle?

1 answer:

Brilliant_brown [7]3 years ago

6 0

B) It’s material moves due to convection currents.

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True or false : Scientific theories have withstood the test of time and are accepted as proven fact.

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False:Laws are theories that have not been proven false.

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How can we relate density and pressure in liquids ??

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Playing soccer on a beach will require more effort because the sand causes a great deal of _______ to the ball.

34kurt

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I believe the answer to be B

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2 years ago

A certain capacitor, in series with a resistor, is being charged. At the end of 10 ms its charge is half the final value. The ti

vichka [17]

To solve this problem we will apply the expression of charge per unit of time in a capacitor with a given resistance. Mathematically said expression is given as

$q(t) = e^{-\frac{t}{(R*C)}}$

Here,

q = Charge

t = Time

R = Resistance

C = Capacitance

When the charge reach its half value it has passed 10ms, then the equation is,

$\frac{1}{2}*q_{final} = e^{-\frac{0.01}{(R*C)}}$

$Ln(\frac{1}{2}) = -\frac{0.01}{RC}$

$- RC = \frac{0.01}{Ln(1/2)}$

$RC = 0.014s$

We know that RC is equal to the time constant, then

$T = RC = 0.014s = 14ms$

Therefore the time constant for the process is about 14ms

5 0

3 years ago