An iron pendulum clock keeps correct time at 20°C. How many seconds will it loose or gain per day when temperature is increased to 30°C?(given, linear expansivity of iron=12×10^-6 per kelvin?

The differences between  a compression wave and a transverse wave?

Determine the amount of work done when a crane lifts a 100-n block form 2m above the ground to 6m above the ground

Consider a production line with five stations. station 1 can produce a unit in 9 minutes. station 2 can produce a unit in 10 minutes. station 3 has two identical machines, each of which can process a unit in 12 minutes (each unit only needs to be processed on one of the two machines. station 4 can produce a unit in 5 minutes. station 5 can produce a unit in 8 minutes. which station is the bottleneck station?