Answer: No , a chemical change has not occured as it was easily reversed.
Explanation:
Chemical change is defined as a change in which rearrangement of atoms take place and leads to formation of new substances. It can only be reversed with the help of a chemical reaction.
Physical change is defined as a change which leads to change in shape, size or state of the substance changes. No new substance is formed.It can be easily reversed.
As the hair colour was washed out and returned to its original brown colour, it was a physical change.
Explanation:
<em><u>Newton's First Law ,</u></em>
F = ma
a = m/F
a = 68 / 59
a = 1.15 m/s2
This contraption is a lot of fun, and you really should try it
some time.
The sound waves move from one can to the other one
by traveling through the string.
Answer:
Wavelength, 
Explanation:
Given that,
Width of the slit, 
The angle between the first dark fringes on either side of the central maximum is 34 degrees
To find,
The wavelength of the light used.
Solution,
The equation of maxima is given by :
n = 1 here
So, the wavelength of the light used is 
. Hence, this is the required solution.
Answer:
hyalugel puchi puchi puchi tu hello hello hello hello hello hello hello hello hello hello
Explanation:
hello hello hello hello hello hello hello hello hello hello hello hello hello hello hello
