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lara31 [8.8K]
3 years ago
15

A handheld glass rod can be charged by rubbing it with silk or a plastic bag while holding it in your hands. Would you conclude

from this that glass is a conductor or an insulator? Why?
Physics
1 answer:
WITCHER [35]3 years ago
3 0

Answer:

a conductor is an object or type of material that allows the flow of charge (electrical current) in one or more directions.

Explanation:

. Materials made of metal are common electrical conductors.

You might be interested in
A remote Internet Web page may sometimes reach your computer by going through a geostationary satellite orbiting approximately 3
soldier1979 [14.2K]

Answer:

0.24 seconds

Explanation:

The signal will reach the computer at light speed = 3\times 10^8\ m/s

Distance between the satellite and the computer = 3.6\times 10^7m

Since, the bodies have no acceleration relative to each other we use the following formula

Time = Distance / Time

\text{Time}=\frac{3.6\times 10^7}{3\times 10^8}\\\Rightarrow \text{Time}=0.12\ s

One way delay would be at least 0.12 seconds.

But when you click on a link to open a website this signal has to be first sent to the satellite then the satellite would have to send the required signal back to the computer.

Hence, the minimum time delay would be 0.12+0.12 = 0.24 seconds

3 0
3 years ago
A typical human lens has an index of refraction of 1.430 . The lens has a double convex shape, but its curvature can be varied b
rjkz [21]

Answer:

Maximum Power = 144.3 D

The associated focal length of the lens = 6.92*10^{-3} m

Explanation:

According to the Lens maker's Formula:

\frac{1}{f} = (n-1) (\frac{1}{R_1}-\frac{1}{R_2}  )

where;

n_1 = the refractive index of the medium

R_1 and R_2 = radius of curvature on each surface

For a convex lens, The radius of curvature in the front surface will be positive and that of the second surface will be negative . Therefore;

\frac{1}{f} = (n-1) (\frac{1}{R_1}-\frac{1}{-R_2}  ) \\ \\ \frac{1}{f} = (n-1) (\frac{1}{R_1}+\frac{1}{R_2}  )

At maximum power

\frac{1}{f} = (1.430-1) (\frac{1}{6.50 \ mm}-\frac{1}{5.50 \ mm}  )

= 0.144 \ mm^{-1}

This Implies

f = 6.92 mm\\f = 6.92*10^{-3} \ m

Therefore; the power is given by the formula:

P_{max} = \frac{1}{f}

P_{max}= \frac{1}{6.92*10^{-3}}

= 144.3 D

3 0
4 years ago
What is the formula for power
Andrew [12]

Power = (energy) divided by (time)


7 0
3 years ago
Read 2 more answers
Encoding information occurs throughout?
alexandr402 [8]
Encoding information occurs throughout forming memory and is the first step of the memory process.
8 0
4 years ago
What is the name of the quantity represented by the symbol ω?
Strike441 [17]

Answer:

angular velocity

Explanation:

In physics the quantity represented by \omega is the <u>angular velocity, </u>the units of the angular velocity are radians/second.

This is a quantity that represents the speed when the movement of an object follows a circular path.

Mathematically defined as follows:

\omega = \frac{2\pi}{T}

Where T is the period, the time it takes to complete a lap.

8 0
3 years ago
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