Is there a certain context to this question so that I can answer it better?
I think it's C. if we're talking about a rover.
But if it's a rocket that's computerized and automatic (synonym of unmanned)... Then it's B.
Answer:
B. in both directions until the temperature is equal in the water and the air
Explanation:
When a warm body is in contact with a cool body , there is exchange of heat energy in both sides until there is attainment of equilibrium temperature . At this temperature both the body attains equal temperature . Initially rate of heat radiated by warm body is more than that from cool body , but after attainment of equilibrium , the rate becomes equal to each other . This is called dynamic equilibrium .
Hence option B is correct .
They will become identical as if they were never broken
The electric field 4cm from the wire is

Given:
charge is distributed uniformly along a long straight wire.
electric field 2cm from the wire is 20n/c
To find:
electric field 4cm from the wire
what is electric field?
Electric field is the region around charge particle or charged body in which if another charge is placed it experiences electrostatic force.An electric field is the physical field that surrounds electrically charged particles and exerts force on all other charged particles in the field, either attracting or repelling them.





thus the electric field 4cm from the wire is

learn more about electrostatic force from here: brainly.com/question/28166144
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