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JulsSmile [24]
2 years ago
5

If we rub a rod and a fabric made of the same material, would the rod become charged? Please explain.

Physics
1 answer:
vfiekz [6]2 years ago
3 0
If you rub a glass rod with a cloth, the charge produced on the glass rod is called positive, whereas when a plastic rod is rubbed with a cloth, the charge produced on the plastic rod is negative.
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A man enters a tall tower, needing to know its height. He notes that a long pendulum extends from the ceiling almost to the floo
wariber [46]

Answer: 187.68 m

Explanation:

Given

Time period T=27.5\ s

The time period of a pendulum is given by

\Rightarrow T=2\pi \sqrt{\dfrac{L}{g}}

where L=height of tower

Put values

\Rightarrow 27.5=2\pi \sqrt{\dfrac{L}{9.8}}\\\\\Rightarrow L=\dfrac{27.5^2\times 9.8}{(2\pi )^2}=187.68\ m

4 0
2 years ago
Physical Science
AveGali [126]

Answer:

Net force is 0 (zero)

Net force direction is 0 (zero)

Explanation:

6 0
3 years ago
The human ear canal is, on average, 2.5cm long and aids in hearing by acting like a resonant cavity that is closed on one end an
scoundrel [369]

Answer:

(a) 3400 Hz

(b) 3.33 cm

(c) It increases

Explanation:

(a) The ear, being open at one end and closed at the other, is equivalent to a closed pipe. For a closed pipe, the first resonant frequency occurs when one quarter of the wavelength is equal to the length of the pipe.

\dfrac{\lambda}{4}=l

\lambda = 4l

Speed is given by

v=f\lambda where f is the frequency.

f=\dfrac{v}{\lambda}

At the first resonant frequency,

f=\dfrac{v}{4l}

f=\dfrac{340}{4\times2.5\times10^{-2}} = 3400\text{ Hz}

(b) At second resonance,

\dfrac{3}{4}\lambda=l

\lambda=\dfrac{4}{3}l

\lambda=\dfrac{4}{3}\times2.5\times10^{-2} \text{ m} = 3.33\times10^{-2} \text{ m} = 3.33\text{ cm}

(c) It increases. Sound travels faster in a liquid than in gas. From the formula in (a), the resonant frequency increases with speed.

4 0
3 years ago
Denisty is found by what equation
algol13

Answer:2

Explanation:

3 0
3 years ago
Read 2 more answers
A car travels 90 km/h. How long does it take for the car to travel
koban [17]

Answer:

4.44 hr

Explanation:

distance= rate*time

400km/(90 km/hr)=time

time=4.44 hr

4 0
3 years ago
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