Question

Asked Jan 28, 2020

2 views

A comb run through one’s dry hair attracts small bits of paper. Why?

Step 1

the comb gets charged by friction when a comb runs through a dry hair. As a result polarization occurs and the molecules present in the paper becomes polarized which leads to the formation of a net force having attractiv...

Tagged in

Find answers to questions asked by student like you

Show more Q&A

Q: The coefficient of volume expansion of glycerine is 49×10-5 K-1. What is the fractional change in it...

A: The expression for the volume expansion of the glycerine is

Q: A hole is drilled in a copper sheet. The diameter of the hole is 4.24 cm at 27.0 °C. What is the cha...

A: Given that, the initial temperature is 27.0 °C, final temperature is 227 °C, and the Coefficient of ...

Q: Let V = 6+ j8 and I = -(2 + j3). (a) Express V and I in phasor form, and find (b) VI, (c) VI*, (d) V...

A: (a) Phasor form of V is,

Q: The light string of a pendulum has the effective length 1m and the mass of bob is 1kg. Find the peri...

A: Given:Effective length of string (l) = 1 mMass of bob (m) = 1 kg

Q: A m1 = 1.90-kg aluminum block and a m2 = 7.05-kg copper block are connected by a light string over a...

A: Click to see the answer

Q: a vocal tract acts as an air column closed at one end. The vocal tract of a singer is 25.0cm long an...

A: Let v be the speed of the sound, L be the length of the air column, f be the frequency of the sound ...

Q: What happens to the wavelength of the water waves as you decrease the frequency by putting your fing...

A: Click to see the answer

Q: Problem 2: A bubble of CO2 forms at the bottom of a lake and rises to the surface. Recall that the p...

A: Here, the bubble A expands adiabatically, and the bubble B expands isothermally, the expressions for...

Q: calculate the x component and the y component of the vector with magnitude 24 degrees and direction ...

A: We are assuming that the given angle is the angle made by the vector above the positive x-axis and t...