A current of 17 A flows through a resistor of 10 2. What is the voltage<br> across the resistor

Ask Your Teacher When a potential difference of 160 V is applied to the plates of a parallel-plate capacitor, the plates carry a

Morgarella [4.7K]

The spacing between the plates is $5.4\cdot 10^{-6} m$

Explanation:

The electric field in the spacing between the plates of a parallel-plate capacitor is uniform and it is given by

$E=\frac{\sigma}{\epsilon_0}$

where

$\sigma$ is the surface charge density

$\epsilon_0 = 8.85\cdot 10^{-12} F/m$ is the vacuum permittivity

We also know that the relationship between electric field and potential difference across a parallel-plate capacitor is

$V=Ed$

where

V is the potential difference

d is the spacing between the plates

Combining the two equations we get

$V=\frac{\sigma d}{\epsilon_0}$

And given that here we have:

V = 160 V

$\sigma = 26.0 nC/cm^2 = 26.0\cdot 10^{-9} C/cm^2=26.0\cdot 10^{-5} C/m^2$

We can solve the equation for d, the spacing between the plates:

$d=\frac{V \epsilon_0}{\sigma}=\frac{(160)(8.85\cdot 10^{-12})}{26.0\cdot 10^{-5}}=5.4\cdot 10^{-6} m$

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7 0

3 years ago

a block initially at rest has a mass m and sits on a plane incline at angle. it slides a distance d before hitting a spring and

KiRa [710]

Answer:

$k = \frac{2\cdot m \cdot g \cdot (d+x_{f})\cdot (\sin \theta - \mu_{k}\cdot \cos \theta)}{x_{f}^{2}}$

Explanation:

Let assume that spring reaches its maximum compression at a height of zero. The system is modelled after the Principle of Energy Conservation and the Work-Energy Theorem:

$U_{g,A}=U_{k,B} + W_{f}$

$m\cdot g \cdot (d + x_{f})\cdot \sin \theta = \frac{1}{2}\cdot k \cdot x_{f}^{2}+\mu_{k}\cdot m \cdot g \cdot (d+x_{f})\cdot \cos \theta$

$m\cdot g \cdot (d + x_{f})\cdot (\sin \theta-\mu_{k}\cdot \cos \theta) = \frac{1}{2}\cdot k \cdot x_{f}^{2}$

The spring constant is cleared in the expression described above:

$k = \frac{2\cdot m \cdot g \cdot (d+x_{f})\cdot (\sin \theta - \mu_{k}\cdot \cos \theta)}{x_{f}^{2}}$

6 0

2 years ago

In 1984 a team of german physicists synthesized a new element by smashing an iron-58 nucleus into a lead-208 target. if a neutro

dimulka [17.4K]

Here in all nuclear reactions we can say that mass conservation and charge conservation is always true

Here iron nuclei smashed into lead nuclei and then a new nuclei will form which will released along with a neutron

Now in this reaction mass and charge will remain conserved

mass number of iron + mass number of lead = mass number of new nuclei + mass number of neutron

58 + 208 = x + 1

x = 265

so the new nuclei formed will have mass number A = 265

now we will use charge conservation

Number of protons in iron + number of protons in lead = number of protons in new nuclei + number of protons in neutron

26 + 82 = z + 0

z = 108

so the new nuclei will form with atomic number z = 108 and mass number A = 265

If we refer periodic table to find such atom we will see that this is $^{265}Hs$

so the new nuclei formed is $^{265}Hs$

5 0

2 years ago

There are 4.2 cups in a liter. of a bottle holds 2.0 cups what does it hold in liters

SOVA2 [1]

2.0 I'm guessing is the answer

3 0

3 years ago

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How did the old view of the solar system look like

zhuklara [117]

The old view of the solar system was geocentric, which means that people believed that the Earth is the center of the universe. However, with the discoveries of Galileo, Newton, and Copernicus, evidence was brought forth that the solar system is actually heliocentric, which means that the sun is the center of the universe.

3 0

3 years ago

A current of 17 A flows through a resistor of 10 2. What is the voltage across the resistor