Question

28. Planck's constant h arose in his research on

A. angular momentum.

B. temperatures and "blackbody" radiation.

C. donuts.

D. crystallographic density

26. The spring constant, k, in the spring force law, F = -kx, is

A. the ratio of gravitational and electromagnetic interactions at the atomic scale.

B. the northern hemisphere value of Coulomb’s constant.

C. the potential energy of a spring at equilibrium position.

D. a property of a spring that encodes the spring’s stiffness against compression or extension.

Answer 1

28. Ans: B. temperatures and "blackbody" radiation.

(The Planck constant can be determined by examining the spectrum of a black-body radiator)

29. Ans:  D. a property of a spring that encodes the spring’s stiffness against compression or extension.

(The spring constant, k, is representative of how stiff the spring is. Stiffer (more difficult to stretch) springs have higher spring constants. The displacement of an object is a distance measurement that describes that change from the normal, or equilibrium, position.)