Answer:
<u>Toxicity is a quantitative property</u>
Explanation:
- Qualitative property of a object cannot be measured it can just be observed
- Quantitative property of a substance can be measured and be assigned a numerical value .
- <u>The toxicity level of a substance can be measured and be assigned a numeral value </u>
<u />
.
That depends on what you want to use them for.
As sources of light, they are somewhere around 15% - 20% efficient.
As heaters, they are somewhere around 80% - 85% efficient.
The answer to the question is 1.5708~1.571.
<span>Delta(f) =f0 * v_rel/c , where v_rel is the relative velocity between source and observer.
The source is moving at a speed v but the sound bounced off the wall and the receiver is moving toward it too.
So,
Delta(f) = f0 (2 V) / c
Hence
V = c Delta(f) /(2 f0)= 344 m/s * (7.00Hz/(2*245Hz)) =4.91 m/s</span>
Answer:
True
Explanation:
Because AxB=lAllBlsin(x)
and x is the angle between them
so, the angle is 180° and sin180 is zero.
