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.

Apulley system is used to lift a 2,000 newton engine up a distance of 3 meters. the operator must apply a force of 250 newtons to the chain of the pulley system to lift the motor. to lift the engine 3 meters, the operator must pull a total of 30 meters of chain through the pulley system. what is the value of di?

Your starship, the aimless wanderer, lands on the mysterious planet mongo. as chief scientist-engineer, you make the following measurements: a 2.50-kg stone thrown upward from the ground at 14.0 m/s returns to the ground in 5.70 s ; the circumference of mongo at the equator is 2.20×10^5 km ; and there is no appreciable atmosphere on mongo. (a) the starship commander, captain confusion, asks for the following information: what is the mass of mongo? (b) if the aimless wanderer goes into a circular orbit 2.20×10^4 km above the surface of mongo, how many hours will it take the ship to complete one orbit? (c) an unmanned spacecraft is in a circular orbit around the moon, observing the lunar surface from an altitude of 44.0 km . to the dismay of scientists on earth, an electrical fault causes an on-board thruster to fire, decreasing the speed of the spacecraft by 23.0 m/s . if nothing is done to correct its orbit, with what speed (in km/h) will the spacecraft crash into the lunar surface?

1700 j of energy is lost from 0.14 kg object , the temperature decreases from 50°c to 45°c what is the specific heat of this object, amd what is the material ?