Which of the following is not a part of dalton s atomic theory?
a. all elements are composed of atoms.
b. atoms of the same element are alike.
c. atoms are always in motion.
d. atoms that combine do so in simple whole-number ratios.

The mini-refrigerator fire was most likely caused by what type of wiring?

If the spring constant k of a pogo stick is 3500 n m and the weight of the person on the pogo stick is 700 n, how much is the spring in the botom of the pogo stick compressed?

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.