Answer:
Because Bricks don't reflect. but mirrors reflect due to their lustre nature.
Explanation:
Answer:False
Explanation:Sound waves need a mediun
Answer:
B) 20N.s is the correct answer
Explanation:
The formula for the impulse is given as:
Impulse = change in momentum
Impulse = mass × change in speed
Impulse = m × ΔV
Given:
initial speed = 40m/s
Final speed = -60 m/s (Since the the ball will now move in the opposite direction after hitting the bat, the speed is negative)
mass = 0.20 kg
Thus, we have
Impulse = 0.20 × (40m/s - (-60)m/s)
Impulse = 0.20 × 100 = 20 kg-m/s or 20 N.s
<span>Niche - </span><span>An organism's particular role in an ecosystem, or how it makes its living.</span>
The answer is D.
C and A are incomplete as they only treat specific types of energy, and B doesn't answer the question.
