This question involves the concepts of charge and potential difference.
The net charge on the balloon is "2.6 x 10⁻⁸ C".
<h3>Net Charge on Balloon</h3>
The balloon has a shape of a sphere. Therefore, the formula for the charge on the surface of a sphere can be used here, as follows:
where,
- Q = net charge = ?
- r = radius of balloon = 15 cm = 0.15 m
- V = potential difference = 1560 V
- = permittivity of free space = 8.85 x 10⁻¹² C²/N.m²
Therefore,
Q = (4π)(8.85 x 10⁻¹² C²/N.m²)(0.15 m)(1560 V)
Q = 2.6 x 10⁻⁸ C = 26 nC
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Answer:
Required energy Q = 231 J
Explanation:
Given:
Specific heat of copper C = 0.385 J/g°C
Mass m = 20 g
ΔT = (50 - 20)°C = 30 °C
Find:
Required energy
Computation:
Q = mCΔT
Q = 20(0.385)(30)
Required energy Q = 231 J
Answer:
the sun is plasma
Explanation:
it is a hot ball of gas made out of oxygen
It will take 20 seconds for the car to attain a speed of 34 m/s
Explanation:
- Acceleration of an object is given by a = velocity/time.
- Here, acceleration of the car = 1.7 m/s² and velocity = 34 m/s. Using these, find time.
- Time = velocity/acceleration
= 34/1.7 = 20 s
So it takes 20 seconds to attain a speed of 34 m/s