Removing heat from a system changes the internal energy of the system. Which scenario correctly represents this case?

A.) placing a bowl of ice cubes in a closed room

B.) adding ice cubes into a thermos of hot coffee

C.) switching on the air conditioning of a closed room

D.) placing a thermos with hot coffee in an air conditioned room

I'm thinking it's 2 you are asked to explain the earth's magnetic field. which is the best reply? 1. the earth's magnetic south is similar to the north pole of a magnet. 2. the earth's core has a strong magnetic charge similar to the south pole of a magnet. 3. the earth's geomagnetic south is similar to the south pole of a magnet. 4. the earth's magnetic charge is not centered at either pole; it varies based on location.

Acar starts from rest at a stop sign and reaches a velocity of 25 m/s w in 4 seconds. determine the acceleration of the car. question 3 options: a) 6,25 m/s2 b)6.25 m/s c)100 m/s2 d)100 m/s

Identify some abiotic characteristics of the tundra biome.