The Celsius degree is
a. the same size as the Fahrenheit degree.
b. larger than the kelvin.
c. the same size as the kelvin.
d. smaller than the Fahrenheit degree.
c
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The torque due to the frictional resistance of the oil film between a rotating shaft and its bearing is found to be dependent on the force F normal to the shaft, the speed of rotation N of the shaft, the dynamic viscosity ? of the oil, and the shaft diameter D. Establish a correlation among the variables by using dimensional analysis.
GIVEN The oil film between a rotating shaft and its bearing The torque (T) due to frictional resistance is a function of normal force (F), speed of rotation (N), dynamic viscosity (?), and shaft diameter (D) FIND A correlation among the variables ASSUMPTIONS Steady state
What evidence do we have that the Universe is expanding?
What will be an ideal response?
Strictly speaking, to weigh less in the Northern Hemisphere, you should move to a location farther
A) north (toward the pole). B) south (toward the equator). C) east. D) west.
A helicopter is traveling at 50.0 m/s at a constant altitude of 150 m over a level field. If a wheel falls off the helicopter, with what speed will it hit the ground? (g = 9.8 m/s2 and air resistance negligible)
a. 63 m/s b. 55 m/s c. 74 m/s d. 54 m/s