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Gelneren [198K]

3 years ago

15

An airplane starts at rest and accelerates at 6.8 m/s2 at an angle of 39° south of west. After 9 s, how far in the westerly dire

ction has the airplane traveled?

1 answer:

cestrela7 [59]3 years ago

7 0

Answer:36.8

Explanation:

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E=<br> (500.0lm)<br> 4 (100)

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Find the speed for Barkely, the dog, if he runs 5.5 miles in 3 hours

amm1812

Answer: B

Explanation:

5.5/3

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If you shine a single light source on a screen you will see that the entire screen is lit up. Assume this light source is of a s

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Answer:

An interference pattern.

Explanation:

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The big bang theory is one of the most accepted theories on the origin of the universe because of scientific evidence, such as _

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3 years ago

Read 2 more answers

A tube of mercury with resistivity 9.84 × 10 -7 Ω ∙ m has an electric field inside the column of mercury of magnitude 23 N/C tha

slava [35]

Answer:

The current through the tube is 73.39A.

Explanation:

The relationship between the resistivity $\rho$ , the electric field $E$ , and the current density $J$ is given by

$\rho = \dfrac{E}{J}$

This equation can be solved for $J$ to get:

$J = \dfrac{E}{\rho}$

Since the current is $I = J\cdot A$

$I= J\cdot A = \dfrac{E}{\rho} \cdot A$

Now, for the tube of mercury $\rho = 9.84*10^{-7}\: \Omega \cdot m$ , $E = 23N/C$ , and the area is $A = \pi r^2 = \pi (1.0*10^{-3}m)^2 = 3.14*10^{-6}m^2$ ; therefore,

$I= \dfrac{23N/C}{9.84*10^{-7}\Omega\cdot m } *3.14*10^{-6}m^2$

$\boxed{I = 73.39A.}$

Hence, the current through the mercury tube is 73.39A.

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3 years ago