Answer:
Banking angle, 
Explanation:
It is given that,
Radius of the curve, r = 52 m
Speed of the car, v = 12 m/s
Acceleration due to gravity, 
Let the curved is banked at an angle of 
with respect to the horizontal. It is given by :
So, the curve is banked at an angle of 15.77 degrees wrt the horizontal. Hence, this is the required solution.
Part (a)
Let h = depth of water surface from the top of the well, m
Because the stone is dropped, its initial velocity is zero.
Let t₁ = time for the stone to drop, s
Then
h = (1/2)*(9.8 m/s²)*(t₁ s)²
t₁ = √(h/4.9) s = 0.4518√h s
The velocity of sound is 336 m/s.
The time for the sound wave to travel from the water surface to the top of the well is
t₂ = h/336 m/s
Because the time before the sound is heard is 2.4 s, therefore
t₁ + t₂ = 2.4
0.45181√h + h/336 = 2.4
Multiply through by 336.
151.8082√h + h = 806.4
h - 806.4 = -151.8082√h
h² - 1612.8h + 6.5028 x 10⁵ = 2.3046 x 10⁴h
h² - 2.4659 x 10⁴h + 6.5028 x 10⁵ = 0
Solve with the quadratic formula.
h = 0.5[2.4659 x 10⁴ +/- 2.4606 x 10⁴]
= 24632 m or 26.5 m
Test the two answers.
When h = 24632,
t₁ = 0.4518√(24632) = 70.9 s (Not acceptable)
When h = 26.5 m,
t₁ = 0.4518√(26.5) = 2.3258 s, t₂ = 26.5/336 = 0.0789 s,
t₁+t₂ = 2.4 s (CORRECT)
Answer: h = 26.5 m
Part (b)
If travel time for the sound is ignored, then
0.4518√h = 2.4
h = (2.4/0.45118)² = 28.2 m
The percent error is 100*[(28.2 - 26.5)/26.5] = 6.42%
Answer: The error is 6.4%
Answer:
It's: double covalent bond
Explanation:
Hope this helps, have a good day
Answer:
silver
Explanation:
It is because it contains a higher number of movable atoms ( free electrons)
Answer:
It wouldn't be 9am in New York because San Francisco is 3 hours behind of New York
Explanation:
