Answer:
B) conducting sound waves better than air
Answer:
1.2 kg
Explanation:
Let UP ramp be the positive direction
F = ma
T - Wt || - Ff = m(0)
mg - Μgsinθ - μΜgcosθ = 0
m(9.8) - 13sin35 - 0.36(13)cos35 = 0
m = 13(sin35 + 0.36cos35) / 9.8
m = 1.15205... ≈ 1.2 kg
5.55 mol H2O
Explanation:
Water has a molar mass of 18.01528 g/mol. We can then calculate the number of moles of water as
100 g H20 × (1 mol H2O/18.01528 g H20)
= 5.55 mol H2O
1) Upward motion
y1 = Vo*t - g(t^2) / 2
2) Downward motion
y2 = D - [Vo*t + g(t^2) / 2]
3) Collision => y1 = y2
y1 = Vo*t - g(t^2) / 2
y2 = D - [Vo*t + g(t^2) / 2]
Vo*t - g(t^2) / 2 = D - [Vo*t + g(t^2) / 2]
Vo*t - g(t^2) / 2 = D - Vo*t - g(t^2)/2
D = 2Vo*t => t = D / (2Vo)
Substitute the value of t in the equation of y1 (it is the same if you do it in the equation of y2)
y1 = Vo*t - g(t^2) / 2 = Vo [D/(2Vo) ] - g [D / (2Vo)]^2 / 2
y1 = D/2 - g(D^2) / 8(Vo ^2)
Answer: y1 = D/2 - g(D^2) / 8(Vo ^2)