Answer:
no the answers r b, d, r, and f
Explanation:
Answer:
a) a = 3.29 m/s²
b) a = 3.51 m/s²
Explanation:
mass of dogs = 19 kg
loaded sled mass = 210 Kg
a)writing all the forces in x direction

a = 3.29 m/s²
b) acceleration when sled start to move the friction will now be acting will be kinetic friction.

a = 3.51 m/s²
Answer:
1) We will have excess of electrons
2) The number of electrons transferred equals 
Explanation:
Part a)
Since we know that the charge transfer occurs by the transfer of electrons only as it is given that the carpet has acquired a positive charge it means that it has lost some of the electron's since electrons are negatively charged and if a neutral body looses negative charge it will become positively charged. The electron's that are lost by the carpet will be acquired by the feet of the human thus making us negatively charged.Hence we will gain electrons making us excess in electrons.
Part b)
From charge quantinization principle we have

where
Q = charge of body
n = no of electrons
e = fundamental charge
Applying values in the above equation we get

An example of a mechanical wave is a sound wave
Friction accord while the ball was rolling in the grass and slowed it down until it finally came to a stop