single core cable is used on a 132 kV, 3-phase system. Find the most economical diameter (in cm) if the peak permissible stress is not to exceed 60 kV/cm​

How will each of the following changes in demand and/or supply affect equilibrium price and equilibrium quantity in a competitive market; that is, do price and quantity increase or decrease, or are the answers indeterminate because they depend on the magnitudes of the shifts?

The man fires an 80 g arrow so that it is moving at 80 m/s when it hits and embeds in a 8.0 kg block resting on ice. how far will the block slide on the ice before stopping? a 7.1 n friction force opposes its motion.

Dao makes a table to identify the variables used in the equations for centripetal acceleration. what quantities belong in cells x and y?