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12 questions
According to the picture from left to right, which of the answers is correct?
neurally buoyant, positively buoyant, negatively buoyant
negatively buoyant, neutrally buoyant, positively buoyant
positively buoyant, neutrally buoyant, negatively buoyant
neutrally buoyant, negatively buoyant, positively buoyant
As a flame heats air in a hot air balloon it starts to rise. Which of the following statements incorrectly explains the chemistry behind why this happens.
The air molecules become less dense & more bouyant than the cooler air in the surrounding atmosphere.
The volume of the gas increases because the molecules in the gas are spaced further apart.
The mass of the of the gas increases causing density to increase & buoyancy to decrease.
Which graduated cylinder has the highest viscosity
The graduated cylinder with the ball at 20mL.
The graduated cylinder with the ball at 30mL.
The graduated cylinder with the ball at 40mL.
The graduated cylinder with the ball at 50mL.
How is viscosity & density affected when a fluid is heated?
viscosity increases & density increases
viscosity decreases & density decreases
viscosity decreases & density increases
temperature has no affect on viscosity or density
At which of these temperatures is the viscosity of the fluid highest? (see graph)
40 °C
60 °C
80 °C
100 °C
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