Question1.
Fill in the blanks in the following
(i) Artificial magnets are made in different shapes such as __________, __________ and ____________.
(ii) The Materials which are attracted towards a magnet are called________.
(iii) Paper is not a ______ material.
(iv) In olden days, sailors used to find direction by suspending a piece of
___________.
(v) A magnet always has __________ poles.
Answer:
(i) Artificial magnets are made in different shapes such as bar-magnet, cylindrical magnet and horse-shoe magnet.
(ii) The Materials which are attracted towards a magnet are called magnetic material.
(iii) Paper is not a magnetic material.
(iv) In olden days, sailors used to find direction by suspending a piece of bar-magnet.
Question2.
State whether the following statements are true or false
(i) A cylindrical magnet has only one pole.
(ii) Artificial magnets were discovered in Greece.
(iii) Similar poles of a magnet repel each other.
(iv) Maximum iron filings stick in the middle of a bar magnet when it is brought near them.
(v) Bar magnets always point towards North-South direction.
(vi) A compass can be used to find East-West direction at any place.
(vii) Rubber is a magnetic material.
Answer:
Answer:
The answer to the question: What thoracic muscle is the prime mover of shoulder flexion, would be, A: Pectoralis minor.
Explanation:
The movement, and stability of the shoulder joint, and the arm itself, depends mostly on many muscles and tendons that keep it from coming apart with movement. While all of them work together to protect this joint and permit arm movement, some of them will aid in a certain type of movement, while others will antagonize these first. The important thing here is that as your joint moves, these muscles activate to ensure stability and movement. During flexion, which is literally the movement of bringing the arm closer to the body, there are several muscles that act as synergists, meaning, they act together to ensure correct movement and stability. One such muscle is the pectoralis minor, which arises from the ribs, and then inserts into the coracoid process of the scapula. In conjunction with other muscles, the pectoralis minor will be prime in shoulder flexion, and will be aided by others.
Answer: Psilocybin ( magic mushrooms)
Symptoms of the magic mushrooms are known to include feeling relaxed or drowsy, nausea, yawning, introspective experience, panic, nervousness, paranoia, hallucinations, and psychosis.
The effects of hallucinogens are physical (relating to the state of the body) and psychological (relating to mental and emotional state of mind) and hazardous when someone abuses them in the long-term and they include;
-Dilated Pupils -Profuse Sweating -Dry Mouth -Tremors -Nausea -Numbness, -Increased Heart Rate (Brainstem) -High Blood Pressure (Brainstem) -Dizziness (Cerebellum) -Loss of Appetite (Hypothalamus) -Mood Swings (Frontal Lobe) -Anxiety (Frontal Lobe).
Explanation:
Other examples of hallucinogens includes,
- LSD (lysergic acid diethylamide)
- PCP (phencyclidine)
- ketamine
- mescaline (peyote cactus)
- morning glory seeds
- datura.
