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Tju [1.3M]
3 years ago
10

A good train took 7 hours to complete its journey. For the first 3 hours, it travelled an average speed of 186km/h. What was the

total distance of the journey? ____ km

Physics
1 answer:
Sliva [168]3 years ago
4 0
I really hope this helps

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Two 2.0 cm by 2.0 cm metal electrodes are spaced 1.0 mm apart and connected by wires of the terminals of a 9.0 V battery.
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Answer:

Explanation:

Area of electrodes, A = 2 cm x 2 cm = 4 cm²

Separation between electrodes, d = 1 mm

Voltage, V = 9 V

(a)

Let C is the capacitance between the electrodes

C = \frac{\epsilon _{0}A}{d}

C = \frac{8.854\times 10^{-12}\times 4\times 10^{-4}}{1\times 10^{-3}}

C = 3.54 x 10^-12 F

Let q be the charge on each of the electrode

q = C x V

q = 3.54 x 10^-12 x 9 = 3.2 x 10^-11 C

(b)

As, the battery is disconnected the charge on the electrodes remains same.

(c)

As the battery is connected the voltage is same.

capacitance is change.

As the distance is doubled, the capacitance becomes half and the charge is also halved. q' = q/2 = 1.6 x 10^-11 C

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3 years ago
When a loop of current-carrying wire turns continuously in a magnetic field, a _________ is created.
Brrunno [24]
A solenoid is created
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3 years ago
Compare and contrast infrasonic and ultrasonic vibrations
Olegator [25]

Answer:

Explanation:

Ultrasonic waves are acoustic waves that are so high in frequency that humans can't hear them; however, infrasonic waves are sound waves that are lower in frequency than what humans can hear. A subsonic wave is a wave that is traveling slower than the speed of sound and a supersonic waves travels faster

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A cube has sides of 11.4 cm. What is its volume? 1,482 cm3 130 cm3 1,443 cm3 34.2 cm3
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The Volume of a Cube with a side(s) of 11.4 cm is 

<span>V = s^3 </span>
<span> V = (11.4)^3 cm^3 </span>
<span> V = 1481.544 cm^3 </span>
<span> V = 1482 cm^3</span>

<span>however the Surface Area of a cube is the combined area of all the sides </span>
<span> A = 6s^2 </span>
<span> A = 6(11.4)^2 cm^2 </span>
<span> A = 779.76 cm^2 </span>
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In the diagram, what is happening to the temperature at Point B? Question 6 options: A. The temperature is rising as the molecul
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<span> B. The temperature is not rising because the heat is being used to break the connections between the molecules </span>
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3 years ago
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