It’s c
Explain. Just know it’s c because suspended scaffolding is on the top list of the other answer choices trust me
Answer:
See below:
Explanation:
What you have done seems to be correct, what we can do is just add a box into the center. For the 3rd question, we can just draw a box as nothing is happening. That is all!
Consider marking as brainliest if it helped!
Answer:
c) is the right answer, since it is the only FALSE statement among the other 4 options, which are TRUE.
Explanation:
Constant "b" stands for the damping term in the oscillatorry equation, which means it is multiplying the first derivate of the movement variable, be it x (distance) or φ (for angular approaches).
Let's exclude the TRUE options:
- a) and d): A very large constant "b" means a high friction into the system, so, if "b" is large enough, it would prevent the system from oscillating (that is, from starting the movement) or, once moving, it may brake it down to zero amplitude within a finite time.
- b) Indeed, a large enough "b" value would mean a supercritical damping case, in which no oscilation takes place. The system breaks despite the real resonance values in frecuency. This means that only for damping below critical values, resonance may occur.
- e) Certainly, the friction may be between two solid bodies. In the case a solid body is inside a fluid environment (liquid or gas), "b" value is proportional to the hidrodynamic or aerodinamic resistance, respectively. This "resistance" depends, amongst other variables, on the shape (fluid distribution) and its cross-sectional area (the wider, the more resistance, the greater "b" shall be).
Finally, as exposed above, a greater "b" value involves a a higher damping, then a higher force against the movement, thus shorter times and quicker damping. This is why opcion c) is the FALSE answer, thus the correct option: it states a wrong principle, opposite to the physics.
Hope that was clear enough! Always think how to exclude answers first, and try to find any option that may be incoherent respect to other(s).
Regards!
A.
The temperature of the water and the and the salinity of water
No. You have to lose a lot of momentum to slow down enough to survive the impact (obviously depending on the height of the building). In your scenario, you can only transfer that momentum to the chair, by pushing it downward with your legs.
Let's say you jump off a 10 metre tall building and have a mass of 75 kg. You will be travelling at about 14 m/s just before impact, with a momentum of 1050 kgm/s. You want to reduce that momentum to around 750 kgm/s (equivalent to falling from a height of 5 m, which is probably survivable and may leave you able to walk away), so you have to transfer 300 kgm/s of momentum to the chair just by pushing it with your legs. For a 10 kg chair that means accelerating it to 30 m/s (in addition to the 14 m/s velocity the chair and you are already falling at), which is rather difficult.
You'd probably be better off landing on the chair and hoping that the chair breaking absorbs enough of the impact.