What is the drag coefficient CD?
What will be an ideal response?
The drag coefficient is the parameter which, when multiplied by a face area and
the kinetic energy of a flowing fluid provides the drag force or total viscous
force tending to drag the object along with the fluid.
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The eccentricity of a planet's orbit describes
a. westward motion in the night sky when observed on successive nights. b. the deviation in shape when compared to a circle. c. its tilt with respect to the ecliptic plane. d. the tilt of the planet's rotational axis with respect to the ecliptic.
Science is a body of knowledge that
A) describes order in nature. B) is an ongoing human activity. C) condenses knowledge into testable laws. D) all of the above E) none of the above
The force due to gravity between two objects can be described using the equation Fg = G M1 M2 / d2. In this equation, what does M1 represent?
A) the mass of one of the objects B) the diameter, in meters, of one of the objects C) the distance, in meters, between the two objects
When 50 g of a certain material at 100°C is mixed with 100 g of water at 0°C, the final temperature is 40°C. What is the specific heat of the material? The specific heat of water is 1.00 kcal/kg ? °C
A) 0.33 kcal/kg ? °C B) 0.75 kcal/kg ? °C C) 1.3 kcal/kg ? °C D) 7.5 kcal/kg ?°C