In the open-die forging of a solid cylindrical, annealed copper specimen ( K = 46,000 psi and n = 0.54) with 2 in. height and 1 in. diameter, calculate the force required when the height reduction is 70%, assume no friction between the flat dies and the specimen. Ignore barreling and use average-pressure formulas.

In a stagnant pool of water, a crayfish may spend much of its time lying with one side of its carapace near the surface of the water. in this position, it will move the walking legs on that side in a rhythmic back-and-forth motion. explain the likely function of this behavior.

What are similarities and differences of reflection, refraction, diffraction and absorption?

When a bicycle coasts uphill, it moves slower and slower as it climbs. why? a. its kinetic energy is transforming into heat energy. b. its potential energy is transforming into kinetic energy. c. its kinetic energy is transforming into potential energy and heat energy. d. its potential energy is transforming into kinetic energy and heat energy.