Answer:
62.6 m/s down
Explanation:
Taking downward to be positive:
Given:
v₀ = 0 m/s
Δy = 200 m
a = 9.8 m/s²
Find: v
v² = v₀² + 2aΔy
v² = (0 m/s)² + 2 (9.8 m/s²) (200 m)
v = 62.6 m/s
<span>It rather depends on your definition of "machine". The normal physics set of simple machines - levers, pulleys, ramps all give you increased force at the expense of reduced speed or increased speed at the expense of reduced force.
So, no - by definition a machine is an arrangement for multiplying one while paying the cost by reducing the other. You are looking at an example of the Conservation of Energy... one of the giant rules we are pretty sure cannot be violated.</span>
Answer:
La velocidad de la onda es 5 m/s.
Explanation:
La velocidad de la onda puede calcularse como:
(1)
Donde:
λ: es la longitud de onda de la ola = 15 m
T: es el período = 3 s
Entonces, reemplazando los valores de T y de λ en la ecuación (1) tenemos:
Por lo tanto, la velocidad de la onda es 5 m/s.
Espero que te sea de utilidad!
45) B) Vaporizing water at its boiling point
46) D) There is no change in temperature
47) B) Molecules must be pulled apart
48) D) Steam at 100 C
Hope this helps!
T=5s
S=5m
U=0s/m
Acceleration=m/s^2
S=ut+(1/2)(a)(5^2)
A=(25/2)=5
A=5/(25/2)
A=10/25
A=2/5
A=0.4
A=0.4m/s^2.