1 The diagram shows an object of weight Wand an object of weight Z balanced on a uniform metre
rule.
a
b
object of
weight w
50 cm mark
object of
-weight Z
pivot
metre rule
Which equation relating to W, Z, a and b is correct?
E Back

2kg of refrigerant 134a undergoes a polytropic process in a piston-cylinder assembly from an initial state of saturated vapor at 2 bar to a final state of 12 bar, 80 degree c. a)determine the work for the process in kj. b)sketch the process on a p-v diagram.

Newtons view of arrangement of the universe

Which statement best describes the direction of the buoyant force on any object? a. opposite the force of gravity b. in the same direction as the weight c. in the direction of motion of the object d. opposite the direction of motion of the object