Answer:
B. positive; negative.
Explanation:
From the viewpoint of Principle of Energy Conservation and Work-Energy Theorem, we notice that gravity represents a conservative force, associated with gravitational potential energy, whereas air resistance is a non-conservative force, associated with dissipated work. Therefore, the work done by gravity is positive and work done by air resistance is negative. Therefore, the correct answer is B.
B because 2800 divide by 40 is 20
Answer:
4 Because Hypothesis sentence always have to be "If" and Then a "then"
Blank 1 Thermal energy
Blank 2 heat
Thermal energy is the total energy of the particles.
Heat is the movement of thermal energy from a substance at a higher temperature to another at a lower temperature
Answer:
reddish-orrange
Explanation:
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