1) The type of heat transfer is radiation (ie the sun's rays)
2) Not entirely sure what you mean but it is possible with this equation: KE = 3/2kT with k being the Boltzmann's Constant and T the temperature in Kelvins
3) True? Not really a question.
4) This would be emissivity
5) Thermal Energy
6) Celsius
7) A thermometer

3 0

3 years ago

Which statement is true for a series circuit?

Anni [7]

Each of those choices has some truth to it, but three of the five choices also include some nonsense.

A. The voltage divides proportionally among all resistors in the circuit.

B. As more resistors are added, the current will decrease. True, because the total resistance will increase.

C. The sum of the voltage drops will be the total voltage in the circuit.

D. The current is the same through all resistors in the circuit.

E. The equivalent resistance will be greater than the individual resistors. True, because the equivalent resistance is the sum of the individual resistors.

7 0

3 years ago

Read 2 more answers

A wire of resistivity rhorho must be replaced in a circuit by a wire of the same material but 4 times as long. If, however, the

kap26 [50]

The resistivity of a wire is given by:

$R=\rho\frac{l}{\pi r^2}$

Where $\rho$ is the electrical resistivity of the wire, $l$ is the length of the wire and r is the radius os the wire, Recall that $r=\frac{d}{2}$ . So:

$R=\rho\frac{l}{\pi(\frac{d}{2})^2}\\R=4\rho\frac{l}{\pi d^2}$

We have $l'=4l, \rho'=\rho, R'=R$ . Thus:

$R'=4\rho'\frac{l'}{\pi d'^2}\\R=4\rho\frac{4l}{\pi d'^2}\\4\rho\frac{l}{\pi d^2}=4\rho\frac{4l}{\pi d'^2}\\\frac{1}{d^2}=\frac{4}{d'^2}\\d'^2=4d^2\\d'=2d$

The diameter of the new wire must be twice of the original wire.

5 0

3 years ago