Answer:
hmmm i dont know....
Explanation:
i just wanted free point. TANKS YOU SIR!!
Maybe this will help you in a way,<span> some physical properties include: appearance, texture, color, odor, melting point, boiling point, density, solubility, polarity, and many others.
- hope this helps you well .</span>
Answer:
The rate of change of the shadow length of a person is 2.692 ft/s
Solution:
As per the question:
Height of a person, H = 20 ft
Height of a person, h = 7 ft
Rate = 5 ft/s
Now,
From Fig.1:
b = person's distance from the lamp post
a = shadow length
Also, from the similarity of the triangles, we can write:
![a = \frac{7}{13}b](https://tex.z-dn.net/?f=a%20%3D%20%5Cfrac%7B7%7D%7B13%7Db)
Differentiating the above eqn w.r.t t:
Now, we know that:
Rate = ![\frac{db}{dt} = 5\ ft/s](https://tex.z-dn.net/?f=%5Cfrac%7Bdb%7D%7Bdt%7D%20%3D%205%5C%20ft%2Fs)
Thus
Answer:
mirrors bounce back light but lenses absorbs light