The answer to your question is (Wave W is being diffracted, Wave X is being reflected, and waves Y and Z are being refracted.)
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1.) B.
2.) A.
3.) A.
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1st find the slope of the line:
(11-5)/(8.2-2.3) = 6/5.9 = 1.01
Find the equation of the line:
y - 5 = 1.01(x - 2.3)
y - 5 = 1.01x - 2.323
y = 1.01x + 2.667
Now set x to 20
y = 1.01(20) + 2.667
y = 20.2 + 2.667
y = 22.867 floors ~ 23 floors
We have 365 days in a year because that is the approximate time of the world revolving around the sun once. It takes 365.25 days to go around once, but the calendar is 365, so we add leap years to add a couple more days.
Given that,
Mass of a baseball, m = 0.2 kg
Initial speed of a baseball, u = 30 m/s
Force produced by a bat, F = 2000 N
Final speed of a baseball, v = -50 (negative for opposite direction)
To find,
For how long was the ball in contact with the bat?
Solution,
Let for t seconds the ball is in contact with the bat. The net force acting on the ball is given by :
So, the ball is contact with the bat for 8 ms.
