Answer!
if the thermal energy of the system increases by 600 jewels and 1400 j of heat were added to the system how much work did the system do

600j

800j

1,400j

2,000j

The work done by the system is 800 Joules.

Explanation:

Internal change in thermal energy of the system,= 600 Joules

Energy added to the system the system,Q = 1400 Joules

Work done by the system can be calculated by using First law of thermodynamics:'

(First law of thermodynamics)

The work done by the system is 800 Joules.

it's when something is going so fast it makes a loud noise, breaking the sound barrier, for example: a jet makes a loud noise, not only cause of the jet but because they reached a point where they went so fast that you can year the noise from various parts, kinda like a police car, lets say the car was going   so fast that you hear the siren of the cop car right next to you, but the car is probably a mile a way, it's cos the siren was next to you a few seconds if you understand me