Which of the following is a limitation of models? A.
Sometimes models provide data when data cannot be acquired from natural objects or events.
B.
Models usually do not have exactly the same features as the objects or events that they represent.
C.
Models are often safer to study than the objects or events that they represent.
D.
It is often easier to study models rather than the objects or events that they represent.

Which statement correctly describes the current in a circuit that is made up of any two resistors connected in parallel with a battery? a. the current in the battery and in each resistor is the same b. the current the battery equals to the sum of the currents in the resistors c. the current in the battery is less than the current in either resistor d. the current in the battery equals to the product of the currents in the resistors

9.98 kg of r-134a at 300 kpa fills a rigid container whose volume is 14 l. determine the temperature and total enthalpy in the container. the container is now heated until the pressure is 600 kpa. determine the temperature and total enthalpy when the heating is completed. use data from the steam tables.

What organization and environment is described above?