26. Why does the need on a compass move when placed in the coll of wirel The comuns needle moves because the flow of electricity
a causes the wire to heat up
b. generates a magnetic field
C is generated by a battery
d. Nows in only one direction
27. Increasing the clectric current in the wire is one way to
#strengthen a solenoid's magnetic field
b. make a solenoid become an electromagnet
C, make an electromagnet become a solenoid
d. create a larger electric field

8.29 two streams containing pyridine and acetic acid at 25°c are mixed and fed into a heat exchanger. due to the heat-of-mixing effect, it is desired to reduce the temperature after mixing to 25°c using a stream of chilled ethylene glycol as indicated in the diagram. calculate the mass flow rate of ethylene glycol needed. the heat capacity of ethylene glycol at these conditions is approximately 2.8 kj/(kg k), and the enthalpy change of mixing (δmixh) is given below.