Answer:
It is formed by a horizontal number line, called the x-axis, and a vertical number line, called the y-axis.
Explanation:
1. H2O- The water completely dissolved the salt.
Alcohol- The alcohol dissolved the salt slightly.
Glycerin-The salt has not dissolved at all.
2. Water
3. Like dissolve like basically works on the principle of polarity. It means the substances which possess similar chemical properties may dissolve in each other. For example, ethanol can be dissolved in water because both are polar in nature whereas non-polar molecules can be dissolved in non-polar solvents only.
4. Generally, a solute dissolves faster in a warmer solvent than it does in a cooler solvent because particles have more energy of movement. For example, if you add the same amount of sugar to a cup of hot tea and a cup of iced tea, the sugar will dissolve faster in the hot tea.
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Answer:
D) 12.3 m/s downward
Explanation:
We use the next free fall equation
where 
is the height of the cliff, 
the initial velocity, 
the acceleration of gravity (
) and 
is time.
For the fist rock 
since the rock was dropped, and 
, so we have:
simplifying
the height of the cliff is 44.145m
Now, about the second rock we know that is the same height and now the time es 
, and we need to find
From the fist equation
we clear for
and substitute known values
wich rounds up to 
the direction is downward because the rock is thrown so that it falls through the cliff.
Answer:
4 km/hr
Explanation:
suppose 's' is Diane's speed with no current.
't' represents time in hrs.
Using the formula:
Distance = speed 's' x time 't'
-> when she swims against the current, equation will be,
5= (s-2)t
t= 5/(s-2)
->when she was swimming with the current, equation is,
15= (s+2) t
t= 15/(s+2)
equating eq(1) and (2)
5/(s-2) = 15/(s+2)
5s + 10 = 15s - 30
40= 10s
s= 40/10
s=4
Therefore, if there were no current, her speed is 4km/hr
Answer:61.275 W
Explanation:
Given
Mass of climber 
Height to climb 
Time taken 
Now Using Work-energy Theorem work done is given by
Now Average Mechanical Power is given by
