Answer:
The lightbulb will not turn on because a switch is connected to it in parallel and when it is closed, like it is now, it becomes a short, by-passing the bulb completely.
Fenomeno de resonancia.
Espero que estoy te ayude :)
The answer to this is A. this is because, refraction with a light or sound wave changing its direction involve propagation,(in which propagation is the change in direction of a light or sound wave)
Answer:
Maximum starting velocity that the car can possess if the stuntman is to be successful = 50 m/s
Explanation:
We have equation of motion ,

, s is the displacement, u is the initial velocity, a is the acceleration and t is the time.
In this case, displacement = 100 meter, acceleration = -8

, time = 10 seconds, we need to find initial velocity.
Substituting

So, Maximum starting velocity that the car can possess if the stuntman is to be successful = 50 m/s
The coordinate system should have the origin at the point where the feather is dropped and the downward direction is to be taken as positive.
All falling bodies experience acceleration towards the center of the Earth due to the force of gravitational attraction exerted on the object by the Earth. A feather, when dropped experiences an acceleration in the downward direction. Since the acceleration of the feather is in the downward direction, a feather, when dropped with zero initial velocity, has its velocity vector directed in the direction of its acceleration.
If the downward direction is taken as positive, the falling feather can be said to have a positive velocity and a positive acceleration.