Rate of performing work is called power.
Time = work done/Power = 1800/300 = 6 sec.
Therefore it takes 6 secs to perform work.
Answer:
heeyya it is the second paragraph
(a) we can solve the problem by using the mirror equation:
where
f is the focal length of the mirror
is the distance of the object from the mirror
is the distance of the image from the mirror.
For the sign convention, f is taken as negative for a convex mirror and
is taken as negative if the image is located behind the mirror, as in this problem. So we have
and re-arranging the mirror equation we can find the distance of the object from the mirror:
from which we find
(b) The magnitude is defined as the ratio between the size of the image and the size of the object, which is also equal to the negative of the ratio between the distance of the image and the distance of the object from the mirror:
Using what we found at point (a), the magnification in this problem is
where the positive sign means the image is upright.
Planetary rings are ice crystals or particles. These particles are numerous and they are small. Jupiter, Saturn, Uranus and Neptune all have rings and are all Jovian planets.
Saturn has big and numerous rings and are visible from Earth. Jupiter's rings are almost invisible and are dusty. Uranus and Neptune have narrow rings but they are very bright and dense and have very thin dust rings in between. Neptune's rings however are more dense than Uranus' and they seem to make arcs rather than complete circles around the planet.
Gap moons are small moons that orbit within the rings. They cause gaps in the rings because of the gravity of the moons. They push through the ring particles and move them away from each other.
Moons that are further away also affect the rings through resonances. Resonances can launch waves within the rings. Resonances also causes gaps in rings when the moons push on the ring particles repeatedly.
Answer:
5.59 m/s
Explanation:
We are given;
Mass = 110 kg
Initial velocity: u = 13.41 m/s
Force = 615 N
Time(t) = 1 s
Now, formula for force is;
Force = mass x acceleration
Thus;
615 = 110 × acceleration
Acceleration(a) = 615/110 = 5.591 m/s²
Now, using Newton's first law of motion, we can find acceleration (a). Thus;
v = u + at
v = 13.41 + (5.591 × 1)
v ≈ 19 m/s
So, change in velocity is;
Final velocity(v) - Initial velocity(u) = 19 - 13.41 = 5.59 m/s