A car traveling at a constant speed goes around a sharp curve. Is the car accelerating? Explain.
2 answers:
Acceleration is defined as the rate of change of velocity of any object with time.
Since, speed is kept constant but direction is changed as it goes around the sharp curve and change in the direction results in acceleration as velocity is a vector quantity which depends upon magnitude as well as on direction.
Although, speed of the car is constant, for motion around the sharp curve, the direction is changing; hence the car will have acceleration.
Thus, the car has acceleration because it is changing direction as it goes around the curve.
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Answer:
5200 ppm
Explanation:
As per the definition, parts per million of a contaminant is a measure of the amount of mass of contaminant present per million amount of the solution. It is denoted by ppm.
Given in the question,
Water = 250 ml = 250 g
Lead = 1.30 g
So,
ppm of Lead = =
= 5200 ppm
So, as calculated above, there is 5200 ppm of lead present in 250 ml of water.
In the modern periodic table, the elements are arranged according to their atomic number - not their relative atomic mass.
In the periodic table the elements are arranged into:
rows, called periods, in order of increasing atomic number
vertical columns, called groups, where the elements have similar properties
In the periodic table the elements are arranged into:
rows, called periods, in order of increasing atomic number
vertical columns, called groups, where the elements have similar properties