You measure the weights of a random sample of twenty-five male runners. the sample mean is 60 kilograms (kg). suppose that the mean weights of male runners follow a normal distribution with unknown mean µ and standard deviation σ = 5 kg. the 95% confidence interval for µ is

When many atoms are split in a chain reaction, a large explosion occurs. this is an example of what type of energy conservation

The space between two 15-in.-long concentric cylinders is filled with glycerin (viscosity = 8.5 × 10-3 lb·s/ft2). the inner cylinder has a radius of 1 in. and the gap width between cylinders is 0.1 in. determine (a) the torque and (b) the power required to rotate the inner cylinder at 180 rev/min. the outer cylinder is fixed. assume the velocity distribution in the gap to be linear.

Astronomers studying the planet of rhombus have detected sedimentary rock on its surface. one astronomer wonders if material in this sedimentary rock used to be in igneous rock deep in rhombus’s interior. can igneous rock become sedimentary rock? explain your answer.