This property is called "Opacity".
The question is worded in a difficult way. A more easily understood wording of this question would be:
"<em>What is the name of the property of a material that prevents light passing through?"</em>
The last choice on the list is the correct one, for both #2 and #3.
40 miles at 20 mph takes 2 hours
180 miles at 60 mph takes 3 hours
<span>Average speed = Total distance / Total time </span>
<span>= (40 + 180) / (2 + 3) </span>
= 220 / 5
= 44
<span>The correct answer is 44 m/s</span>
Answer:
Explanation:
From the question we are told that:
Velocity 
Time 
Distance 
Generally the Newton's equation for Speed going down the stream is mathematically given by
Therefore
Answer:
a) centripetal force = m v^2 / R = 329 * (29.6 m/s)^2 / 183
F = 1580 Newtons
b) normal force = gravitational force - F = 329 * 9.8 - 1580 = 1640 N
