If the lens in a person's eye is too highly curved, this person is suffering from: nearsightedness.
lens is a piece of transparent material (such as glass) that has two opposite regular surfaces either both curved or one curved and the other plane and that is used either singly or combined in an optical instrument for forming an image by focusing rays of light.
The lens is used to form an image of an object by focusing rays of light from the object.
Various types of lenses are :
- Concave lens.
- Convex lens.
- Plano lens.
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Answer: -39.2 m/s or 39.2 m/s directed downwards
Explanation:
This situation is a good example of Free Fall, where the main condition is that the initial velocity must be zero 
, and the acceleration is constant (acceleration due gravity).
So, in order to calculate the final velocity 
of the rock just at the moment it hitsthe bottom of the cliff, we will use the following equation:
Where:
is the acceleration due gravity (directed downwards)
is the time it takes to the rock to fall down the cliff
This is the rock's final velocity and its negative sign indicates it is directed downwards
Answer:
Lacks colored blood - Scorpion
Soft, unsegmented body - Octopus
A vertebrate - Bird
Lacks antennae - Starfish
Explanation:
Scorpion belongs to the Phylum Arthropoda of the Kingdom Animalia. All the organisms of this phylum lack coloured blood.
Octopus comes under the Phylum Molusca of the Kingdom Animalia. Soft, unsegmented body is the property of the organisms of this phylum.
Bird belongs to the Vertebrata class of the Phylum Chordata of Kingdom Animalia.
Starfish belongs to Echinodermata Phylum of the Kingdom Animalia. The organisms of this category do not posses antennae.
Answer:
4 blocks west is final displacement. So 4 blocks per hour
