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fenix001 [56]
4 years ago
15

The gap between electrodes in a spark plug is 0.060 cm. Producing an electric spark in a gasoline-air mixture requires an electr

ic field of 3.0 x 10^6 V/m. What is the magnitude of the minimum potential difference that must be supplied by the ignition circuit to start a car
Physics
1 answer:
Mandarinka [93]4 years ago
8 0

Answer:

The magnitude of minimum potential difference is 1800 V

Explanation:

Given:

Electric field E = 3 \times 10^{6} \frac{V}{m}

Gap between electrodes d = 0.060 \times 10^{-2} m

For finding the minimum potential difference,

  \Delta V = E \times d

  \Delta V = 3 \times 10^{6} \times 0.060 \times 10^{-2}

  \Delta V = 1800 V

Therefore, the magnitude of minimum potential difference is 1800 V

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Fiesta28 [93]

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4 0
3 years ago
What layer of atmosphere does planes fly?
Sergeeva-Olga [200]

Answer: stratosphere

The stratosphere is the second to last layer of atmosphere to the Earth. It is about 40,000 feet above, and this is the range where planes fly. So, the answer is stratosphere.

Hope this helps!

4 0
3 years ago
A mass of 4kg suspended by a light string 2m long and at rest is projected horizontally with a velocity of 1.5 m/s. find the ang
Dafna11 [192]

Answer:

19.5°

Explanation:

The energy of the mass must be conserved. The energy is given by:

1) E=\frac{1}{2}mv^2+mgh

where m is the mass, v is the velocity and h is the hight of the mass.

Let the height at the lowest point of the be h=0, the energy of the mass will be:

2) E=\frac{1}{2}mv^2

The energy when the mass comes to a stop will be:

3) E=mgh

Setting equations 2 and 3 equal and solving for height h will give:

4) h=\frac{v^2}{2g}

The angle ∅ of the string with the vertical with the mass at the highest point will be given by:

5) cos\phi=\frac{l-h}{l}

where l is the lenght of the string.

Combining equations 4 and 5 and solving for ∅:

6) \phi={cos}^{-1}(\frac{l-h}{l})={cos}^{-1}(1-\frac{h}{l})={cos}^{-1}(1-\frac{v^2}{2gl})

8 0
4 years ago
When an object such as a plastic comb is charged by rubbing it with a cloth, the net charge is typically a few microcoulombs. If
masya89 [10]

The concept required to solve this problem is quantization of charge.

First the number of electrons will be calculated and then the total mass of the charge.

With these data it will be possible to calculate the percentage of load in the mass.

Q= ne

Here Q is the charge, n is the number of electrons and e is the charge on the electron

n = \frac{Q}{e}

Replacing,

n = \frac{4*10^{-6}C}{1.6*10^{-19}}

n = 2.5 * 10^{13}77

According to the quantization of charge the charge is defined as product of the number of electron and the charge on the electron

The total mass of the charge is

m= nm_e

Here,

m = Mass of the charge

n = Number of electrons

m_e = Mass of the electron

\text{Percentage change} = \frac{nm_e}{M}*100

Replacing we have

\text{Percentage change} = \frac{(2.5*10^13)(9.1*10^{-28})}{33}*100

\text{Percentage change} = 6.9*10^{-14} \%

6 0
4 years ago
Which statement best describes the energy changes that occur while a child is riding on a sled down a steep, snow-covered hill?
svp [43]
The answer is C, because they moved from a stand still to down the hill
4 0
4 years ago
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