Answer:
A, It must display quantum effects.
Explanation:
Looking at the available options, B, can't be right because it isn't smaller than a single atom, C isn't right because it is not bigger than a microfilm, and nanotechnology can indeed be controlled, making D also wrong, making A the only valid option. (I just did it on Edge, and it was also right)
No they all don't need a medium to travel.
Example is electromagnetic waves which travel through vacuum.
The correct answer is C) towards the center of the circle.
Although the object is moving at a constant speed it is constantly accelerating due to the constant change in direction as it describes the circular path. This causes a constant change in velocity as velocity is a vector quantity.
For the object to maintain the circular path there has to be centripetal force acting on the object and this centripetal force is directed towards the center of the circle.
Answer:
0.408m/s
Explanation:
To develop this problem it is necessary to take into account the concepts related to the radiation pressure applied by an electromagnetic wave on a surface of perfect absorption. Radiation pressure can be viewed as a consequence of the conservation of momentum given the momentum attributed to electromagnetic radiation. According to Maxwell's theory of electromagnetism, an electromagnetic wave carries momentum, which will be transferred to an opaque surface it strikes.
The pressure is experienced as radiation pressure on the surface:
Where,
P = Pressure
I = Incident irrandiance
c= Speed of light in vacuum
For definition we know that Incident irradiance is defined as,
Where is the Power required and A the area (For a circle in this case)
Then replacing,
Substituting our values we have,
With the pressure we can now calculate the Force and the Acceleration to find finally the velocity, that is
The acceleration then would be expressed as indicate the Second Newton's Law
The velocity is:
Therefore the speed would such a block have if pushed horizontally 100m along a frictionless track by such a laser is 0.408m/s