A physics student weighing 500 N stands on a scale in an elevator and records the scale reading over time. The data is
shown in the graph above. At time t = 0, the elevator is at rest
on the ground floor. What is the acceleration of the student
from 10-15 s?

Consider an insulating crystal, made up of layers of atoms. what form would you expect the temperature dependence of the phonon heat capacity to approach at extremely low temperatures if the interlayer coupling is i)very strong (rigid coupling), and ii) very weak. explain.

Matter is needed to transfer thermal energy bya. conductionb. convectionc. radiation d. both a & b.

Both independent and dependent clauses