Answer:
Explanation:
Speed is a scalar quantity and it doesn't depend on direction
Speed is the total distance traveled divided by the total time taken
Speed = Total Distance / Total time taken
Given that,
A plane can traveled 3952 km in 3 hours normally.
So, it's normal speed is
Speed = total distance / total time
Speed = 3952 / 3
Speed = 1317.33 km/hr
Now, in cloudy skies it will traveled 184 km less than it's usually distance in the same time range.
Then, we want to find the speed in cloudy skies
Since we know that speed is total distance divide by total time,
We need to know the total distance in cloudy skies
Total distance = Normal distance travelled — delay due to cloudy skies
Total distance. = 3952 - 184
Total distance = 3768 km
Total time = 3 hours
Then,
Speed = total distance / total time
Speed = 3768 / 3
Speed = 1256 km/hr
The speed of the plane in cloudy skies is 1256 km/hr. The speed reduces because it traveled less distance for the same time.
Answer:
These are the refractive defects of vision because they are caused by the incorrect refraction of light rays by the eye-lens. These defects of vision can be corrected by using suitable spherical lenses (convex lenses or concave lenses). These lenses are usually used in the form of eye-glasses or spectacles.
Explanation:
Two solids in a liquid. ^^
publish a book in which he explained his heliocentric theory.
Explanation:
The heliocentric theory is the one according which the Sun is in the center of our Solar Sistem and the planets go around it.
Previously to this theory (before Copernicus) the prevalent theory was geocentrism accordind which it was the earth who stood in the center and all the other celestial bodies went around it.
:-)
The needle has buoyancy and that means it won't sink. It also has a lot to do with the weight of the needle which is very little. The less weight there is the easier it will be to float.