astronomers named the planet Kepler-186f
Astronomers named the planet they discovered Kepler-186f after the Kepler space telescope, which took the first picture of the planet.
Which is the SI base unit for mass? I think its D
B. kg
C. g
D. mg
(and no it doesn't give any options, it can be any device you can think of that uses a Convex lense)
Answer:
Explanation:
Convex lens is the lens which is used to converge the rays of light after refraction.
When the rays of light are coming parallel to the principal axis then after refraction they goes from the focus.
It is used as rear view mirror in automobiles. In this case it pelroduces small and erect image of faroff objects.
It is used in spectacles using for hypermetropia.
It is used in microscopes and telescopes.
Our eye also have a convex lens which forms images on retina.
Answer: Doppler effect
Explanation:
The Doppler effect refers to the change in a wave perceived frequency when the emitter of the waves, and the receiver (or observer in the case of light) move relative to each other.
In other words, it is the variation of the frequency of a wave due to the relative movement of the source of the wave with respect to its receiver.
Another important aspect is that the effect occurs in all waves (including light and sound). However, it is more noticeable to humans with sound waves.
The Doppler effect is the apparent change in frequency of waves due to the motion of a source.
Answer:
The net force is zero, so the acceleration is zero
Explanation:
Newton's second law states that the acceleration of an object is proportional to the net force applied to it, according to the equation:
(1)
where
is the net force on the object
m is the mass of the object
a is its acceleration
In this problem, we have a sled acted upon two forces, . So the net force on the sled is
(2)
however, we are told that the two forces are equal in magnitude but in opposite directions, so
So, eq.(2) becomes
and so eq.(1) becomes
which means
so the acceleration of the sled is zero, and if the sled was at rest, it will not move.
The speed of the pendulum is greatest at the midpoint of the pendulum marked 3.
A pendulum is an device that can be used to demonstrate oscillation. We know that in pendulum the potential energy is maximum at the ends of the pendulum.
Thus, the speed of the pendulum is greatest at the midpoint of the pendulum marked 3.
Learn more about pendulum:brainly.com/question/14759840?
#SPJ9
Answer:
The speed of the pendulum is at maximum at x=0