Answer:
The number is 
Explanation:
From the question we are told that
The net charge is 
Generally the charge on a electron is 
Generally the number of excess electrons is mathematically represented as

=> 
=> 
Answer:3 is sublimation
Explanation:
It goes from solid straight to gas
They have expression<span>, modesty, sex appeal, </span><span>simplicity.</span>
Answer:
The wavelength will be 4 cm, frequency will be 4.66 Hz and wave speed is 18.6 cm/sec
Explanation:
Given:
No. of crest = 13
No. of trough = 15
Time = 3 seconds
Hence, 1 crest or 1 trough = 
therefore,
13 C + 15 T = 
=
Time given 3 seconds
= 

2 cm distance is travelled is time period

Again wave will travel in 1 T = 4 cm
wave speed v =
= 
= 18.6 cm/s
Hi there!
Recall the equation for momentum:

p = momentum (kgm/s)
m = mass (kg)
v = velocity (m/s)
We can plug in the given values to solve for velocity:
