Answer:
v = 6.72 m/s
Explanation:
Given that,
Vertical height, h = 2.31 m
We need to find the speed at the bottom of the slide. Let the speed be v. We can find it using the conservation of energy such that,
Put all the values,
So, her speed at the bottom of the slide is equal to 6.72 m/s.
B. A machine changes the magnitude or direction of the force. Hope that helped.
Answer:
(a) right
(b) λ = 4.65m
(c) v = 1519m/s
(d) f = 327Hz
Explanation:
The characteristic sinusoidal pressure fluctuation equation for a wave traveling to the right is given as
P(x,t) = BkASin(kx-ωt)
Where
B = Bulk modulus
k = wave number
A = displacement amplitude
x = position on the x-axis
ω = angular frequency
t = time t
(a) the wave is travelling to the right
(b) from the given equation
ΔP(x,t) = (24.0 / r) sin(1.35r - 2050t)
1.35 compares with k
So k = 1.35rad/m
And k = 2π/ λ
λ = 2π/k = 2π/1.35 = 4.65m
(c) ω =kv
From the given equation ω = 2050 rad/s
v = ω/k = 2050/1.35 = 1519m/s
(d) f = v/λ =1519/4.65 = 327Hz
The total energy remains the same, as long as
none of it escapes the closed system.
The Continental crust is also less dense than oceanic crust, though it is considerably thicker; mostly 35 to 40 km versus the average oceanic thickness of around 7-10 km. About 40% of the Earth's surface is now underlain by continental crust.