Hydrogen is an element made of two or more kinds of atoms. Hydrogen is a compound made of only one kind of atom.
Explanation:
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Answer:
1) 10.05 N/m
2) 20.69 m
Explanation:
1) If the jumper completes 8 cycles in 49 seconds, then the period of each cycles is T = 49/8 = 6.125 s
From this info we can calculate the spring constant, treating this as simple harmonic motion k:
2) Let g = 9.8 m/s2. So the jumper weight is F = mg = 60*9.8 = 588 N. With this force the jumper would have stretched the bungee a length of
x = F/k = 588 / 63.14 = 9.31 m
As the jumper is at rest 30m below the bridge and the cord is stretched by 9.31m. Then its original length would be 30 - 9.31 = 20.69 m
With that information you can only suppose a uniformly accelerated motion. This is, acceleration is constant.
Then, acceleration = change in velocity / change in time = (58 -54)km/h / 2 h = 4km/h / 2 h = 2 km/h^2
Then the equation for velocity, V is
V = Vo + a*t = Vo + 2 (km/h^2) * t = Vo + 2t
Vo is the initial velocity, which you can find using V = 54km/h and t = -2
Vo = V after 2 hours - a*(2hours) = 54km/h - 2(km/h^2)*2h = 54km/k - 4km/h = 50km/h
Then, the equation is: V = 50 km/h + 2t
Valid for constant acceleration.
Answer:
Relative dating is used to determine a fossils approximate age by comparing it to similar rocks and fossils of known ages. Absolute dating is used to determine a precise age of a fossil by using radiometric dating to measure the decay of isotopes, either within the fossil or more often the rocks associated with it.