Answer: a. Mass per unit length =0.0245kg/m
b. Tension =2.45x10^-8N
C. Tension = 2.45 x10^-8N
Fundamental frequency =200Hz
Explanation:
A student measures the length of the shadow of the Washington Monument to be 620 ft. If the Washington Monument is 555 ft tall,
approximate the angle of elevation of the Sun to the nearest tenth of a degree.
1 answer:
Answer:
The angle of elevation of the Sun = 41.8°
Explanation:
Let the angle of elevation of the sun be θ
Using trigonometric relations,
Tan θ = opp/adj
opp = the height of the Washington Tower = 555 ft
adj = the length of the shadow = 620 ft
Tan θ = (555/620) = 0.8952
θ = Tan⁻¹ (0.8952) = 41.8°
Hence, the angle of elevation of the Sun = 41.8°
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Answer:0.931 s
Explanation:
Given
initial speed=1.1 m/s
height(h)=28 m
after 0.5 sec blue ball is thrown upward
Velocity of blue ball is 24.4 m/s
height with which blue ball is launched is 0.9 m
Total distance between two balls is 28-0.9=27.1 m
Let in t time red ball travels a distance of x m
--------1
for blue ball
-----2
Add 1 & 2
we get
t=0.931 s
after 0.931 sec two ball will be at same height