Which statement is true according to hooke's law?

a. as the force on a spring increases, the spring's length remains unchanged.

b. the distance a spring stretches has nothing to do with how much force is applied to it.

c. as the force on a spring increases, the distance it stretches increases.

d. as the force on a spring increases, the distance it stretches decreases.

In 1980, alfa romeo introduced the first system to smooth a rough idle caused by ignition and camshaft timing changes.

Part 1: a magnetic levitation or maglev train rides rails without touching them. explain how this works using your data. include the appropriate magnet drawing in your answer. part 2: two objects are near a bar magnet. one is about 1 cm away, while the other is 6 cm away. compare and contrast the magnetic force that affects each object. use your data to answer the question

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.