Two families meet at the park at 10: 00am. each family uses a different way of transportation to get there. the gonzalez family leaves at 9: 00am and drives 90 km on a highway. the rivera leave at 9: 30am and ride the train 30km. what is the average speed for each family’s trip? which family travels at the faster speed?

How is the gravitational force related to the distance between two objects?

When electrons are added to the outermost shell of a carbon atom, it forms--an anion that has a larger anion that has a smaller cation that has a larger cation that has a smaller radius.

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.