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shusha [124]
3 years ago
8

A student designs an experiment where he takes a small wood car with 1.0 inch diameter wheels and rolls it down a ramp. The stud

ent measures the speed of the car when it reaches the bottom of the ramp. The student then takes a small plastic car with 1.5 inch diameter wheels and repeats the process. Finally, the student takes a small metal car with 2.0 inch diameter wheels and repeats the process a final time. The student notes that the metal car had the fastest speed at the bottom of the ramp.
The student can conclude:
Chemistry
2 answers:
aleksley [76]3 years ago
8 0
The metal car airodinamics with body style and weight increased speed
Anastaziya [24]3 years ago
3 0

Answer:

As the radius of a wheel , in rolling motion on a inclined plane, changes , its final speed , does not change . In other words , acceleration of wheel on inclined plane does not depend upon radius of the wheel . It also does not depend upon the mass of the wheel.

Explanation:

In case of perfect rolling on an inclined plane, the acceleration of body is given by the following expression.

a = g/1+k²/r² where k is known as radius of gyration . For a wheel its value is equal to( 1/√2)r.r is radius . From this expression , one can conclude that acceleration and therefore velocity does not depend upon radius of the wheel . Therefore the reason of the metal car having greatest speed  is the resistance of air and friction of surface being the least in its case.

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Enthaply of combustion of glucose= 2,780 kJ/mol.

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The temperature change from the combustion of the glucose is 6.097°C.

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Use formula: Initial Pressure x Initial Volume/Initial temperature = Final pressure x Final Volume/Final Temperature => 17.15L

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