Velocity problem, look back at the velocity and speed formula to answer this question: A passenger elevator travels from the first floor to the 60th floor, a distance of 210 m in 35 sec. What is the speed of the elevator?.

Apossible explanation for a set of facts that can be tested by further investigation is called

What is the speed of an object at a given moment?

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.