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.
True x rays help you see broken bones right ?
The correct answer is<span> measure the distance to a star.
It is</span> the semi-angle of inclination between two sight-lines to the star, as observed when the Earth is on opposite sides of the Sun in its orbit. This is used to measure the distance to closer stars.
Answer:
Explanation:
Given data
Radius R=6.80 m
Velocity v=18 km/h =5 m/s
First we need to set up for Force in vertical (y) and horizontal (x)
∑Fy=0=TCosα-W
∑Fx=ma=Fc=TSinα
Solve Vertical force equation for T,substituting mg for W
Substitute expression for Fc and T into horizontal force and simplify it we get
The units of temperature are different. one is Fahrenheit and the other is Celsius
