What is the change in internal energy if 50 j of heat are released from a system, and the system does 80 j of work on its surroundings?

The graph describes the motion of an object. the object moves with from a to b. it from b to c. it moves with from c to d.

Quantum mechanics applies to subatomic, atomic, nanometer-size, and micrometer-size systems. nanometer, micrometer, and kilometer-size systems. atomic, nanometer-size, and micrometer-size systems. subatomic, atomic, and nanometer-size systems.

What is the relationship between the direction of motion of the balloon and the wind currents