Explanation:
Let 
is the frequency of oscillation of a block that undergoes simple harmonic motion. The frequency of oscillation is given by :
...............(1)
Where
k is the spring constant of the spring
m is the mass of the block
It is clear from equation (1) that the frequency of the oscillation depends on the spring constant and the mass of the block. So, on increasing the spring constant, the block oscillate with a greater frequency.
Let x be the time it takes for the trip to be completed given that the speed is y.
When the time is 30 minutes (equal to 0.5 hour) shorter than x, the speed is 8 mph more than the original speed.
The equations that would best represent the given conditions are:
(1) 120 = (x)(y)
(2) 120 = (x - 0.5)(y + 8)
Simplifying,
y = 120/x
Substitute:
120 = (x - 0.5)(120/x + 8)
The value of x from the equation is 3. Thus, if I go with the usual speed, the time it will take me to finish the trip is approximately 3 hours.
The age of the given rock is 700 million years.
The given parameters;
- <em>original mass of the rock, = 20 g</em>
- <em>mass of the rock remaining after decay, = 10 g</em>
- <em>half life of Uranium, </em>
<em> = 700 years</em>
age of the rock ----------------------------- mass remaining
0 
------------------------------------------- 20 g
1 half life (
) ------------------------------ 10 g
Age of the rock 
Thus, the age of the given rock is 700 million years.
Learn more here:brainly.com/question/23774743
That's the symbol used for a battery. Actually, it's <em>one cell of a battery</em>, and if there's more than one cell used in the circuit, then the same symbol is repeated in the diagram.
The longer line ... on the left side in this picture ... represents the positive ( + ) side of the cell. The short, fat line on the right is the negative side.
600,000
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