Four equal masses m are so small they can be treated as points, and they are equally spaced along a long, stiff wire of neglible mass. the distance between any two adjacent masses is ℓ . m m m m ℓ ℓ ℓ what is the rotational inertia icm of this system about its center of mass?
a.) (1/2)ml^2
b.) ml^2
c.) 5ml^2
d.) 6ml^2
e.) 2ml^2
f.) 3ml^2
g.) 7ml^2
h.) 4ml^2.

Complete the sentence to describe the law of conservation of energy. the law of conservation of energy states that energy cannot be created or , but it can be

Henry, whose mass is 95 kg, stands on a bathroom scale in an elevator. the scale reads 830 n for the first 2.4 s after the elevator starts moving, then 930 n for the next 2.4 s. part a what is the elevator's speed 4.8 s after starting? express your answer with the appropriate units.

Two kilograms of air within a piston–cylinder assembly executes a carnot power cycle with maximum and minimum temperatures of 800 k and 300 k, respectively. the heat transfer to the air during the isothermal expansion is 60 kj. at the end of the isothermal expansion the volume is 0.4 m3. assume the ideal gas model for the air. determine the thermal efficiency, the volume at the beginning of the isothermal expansion, in m3, and the work during the adiabatic expansion, in kj.