Answer:
the stratosphere
Explanation:
Planes most commonly fly in the lower stratosphere to avoid turbulence which is common in the troposphere. little to no clouds appear in the stratosphere due to low humidity so it is easier to see.
Answer:
The velocity is highest at the lowest point of the trajectory
Explanation:
We can answer the question by applying the law of conservation of energy. In fact, neglecting friction and air resistance, the mechanical energy of the pendulum is constant during the motion:
where:
is the kinetic energy, with m being the mass of the pendulum and v the velocity
is the potential energy, with g being the acceleration due to gravity and h the heigth of the pendulum with respect to the lowest position
Since E must remain constant, we see that when K is maximum, U is minimum, and viceversa. This also means that when the velocity (v) is maximum, then the height (h) is minimum, so the pendulum must be at its lowest point.
B. An element.
Remember, the Peroidic Table of Elements.
A map can be used in geography.
An inch can be used in mathematics.
A thermometer can be used in wheather.
But an element is the most likely choice.
Answer:
Angle of incidence ray
Explanation:
The way light reflects off a smooth surface is described by the law of reflection. This law states that the angle of reflection equals the ANGLE OF INCIDENCE RAY.
This is because, when light is reflected off a smooth surface, the light is reflected by all the points that is present on that smooth surface.
Therefore the speed at which the light rays falls on the smooth surface is the same as the speed at which the light ray is reflected back. Due to their speed been the same, the distance of the incidence ray would also be the same as the distance of the reflected ray.
Hence the angle of incidence = angle of reflection.
