What can be increased in order to increase the magnetic field?

the size of the iron core

the magnetic poles

the wire resistance

the current

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?

Asun-sized star will spend most of its lifetime as a: white dwarf red giant protostar main-sequence star

50 g of ice at 0°c is dropped in a beaker containing 100 g of water at 0°c. what will be the contents of the beaker after 5 hours? assume that the room temperature is 0°c.