An object is spun around in circular motion such that its period is 0.2 seconds.
1 answer:
Answer:
a. 5 Hertz
b. 35 rotations
Explanation:
a. Frequency is given by where
is the period, in seconds. Given that
, the frequency of this object's rotation is:
b. Since one rotation, or period, is completed in 0.2 seconds, divide the amount of time (7 seconds) by the time it takes to complete one revolution (0.2 seconds):
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Answer:
<h3>0.445</h3>Explanation:
In friction, the coefficient of friction formula is expressed as;
Ff is the frictional force = Wsinθ
R is the reaction = Wcosθ
Substitute inti the equation;
Given
θ = 24°
Hence the coefficient of kinetic friction between the box and the ramp is 0.445
Answer:
The mass of air stored in the vessel is 235.34 kilograms.
Explanation:
Let supossed that air inside pressure vessel is an ideal gas, The density of the air (), measured in kilograms per cubic meter, is defined by following equation:
(1)
Where:
- Pressure, measured in kilopascals.
- Molar mass, measured in kilomoles per kilogram.
- Ideal gas constant, measured in kilopascal-cubic meters per kilomole-Kelvin.
- Temperature, measured in Kelvin.
If we know that ,
,
and
, then the density of air is:
The mass of air stored in the vessel is derived from definition of density. That is:
(2)
Where is the mass, measured in kilograms.
If we know that and
, then the mass of air stored in the vessel is:
The mass of air stored in the vessel is 235.34 kilograms.