Based upon the brief descriptions provided in the figure, which subfield of physics would you say is involved in explaining why an ice-cube melts? Table 1.2
The Major Subfields of Physics
Mechanics. The study of forces and motion
Thermodynamics. The study of temperature, heat, and energy
Electricity and Magnetism. The study of electric and magnetic
forces and electric current
Optics. The study of light
Atomic Physics. The study of the structure and behavior of atoms.
Nuclear Physics. The study of the nucleus of the atom.
Particle Physics. The study of subatomic particles (quarks, etc.).
Condensed Matter Physics. The study of the properties of matter
in the solid and liquid states.

Ablock of mass m = 2.5 kg is attached to a spring with spring constant k = 710 n/m. it is initially at rest on an inclined plane that is at an angle of θ = 23° with respect to the horizontal, and the coefficient of kinetic friction between the block and the plane is μk = 0.19. in the initial position, where the spring is compressed by a distance of d = 0.16 m, the mass is at its lowest position and the spring is compressed the maximum amount. take the initial gravitational energy of the block as zero. a) what is the block's initial mechanical energy? b) if the spring pushes the block up the incline, what distance, l, in meters will the block travel before coming to rest? the spring remains attached to both the block and the fixed wall throughout its motion.

Which situation will have the highest resistance? a.long wire and high temperatureb.short wire and high temperaturec.long wire and cold temperaturedshort wire and low temperature

According to an observer on earth, planet x is stationary. maria and samir depart earth on their spaceships at the same time, each flying at 0.5c. maria flies toward planet x and samir flies in the opposite direction. according to maria, her voyage to planet x takes 9 years. how many years does maria's voyage take according to samir?