19) Suppose that a car traveling to the east (+x direction) begins to slow down as it approaches a traffic
1 answer:
Answer: C) Its acceleration is decreasing in magnitude as the car slows down.
Explanation:
According to the described situation <u>the car's final velocity is less than its initial velocity</u>, this means the car's velocity decreased as it slows down.
On the other hand, acceleration is defined as the variation of velocity in time:
If the car's velocity decreases, its acceleration is negative. Hence, the acceleration is decreasing in magnitude as well.
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Answer:
f = - 0.143 m = - 14.3 cm
Explanation:
First, we will calculate the power of the combination of lenses:
P = P₁ + P₂
where,
P = Power of Combination = ?
P₁ = Power of first lens = - 5D
P₂ = Power of second lens = - 2D
Therefore,
P = - 5D - 2D
P = - 7D
Now, the focal length can be given as:
<u>f = - 0.143 m = - 14.3 cm</u>
Negative focal length indicates that combination will act as diverging lens.