Quinine is used to treat malaria and its symptoms (B). It works by killing the organisms that cause malaria (Plasmodium falcipartum). Keep in mind its only used to treat malaria, but not to prevent it.
Answer:
Physical changes can easily be reversed but chemical changes cannot because in physical change only state is changed while in chemical change, new substances are formed. For example, when water in liquid form is condensed, it changes into solid form (ice). It is a physical change because water in liquid and solid have the same chemical formula only arrangement of molecules are different. Burning of wood is a chemical change because new substances i. e. carbondioxide and heat is produced.
1) A
2) B
3) C
4) D
5) E
6) F
7) G
8) H
The answers are already in the picture.
Answer: <u>Option C; 48</u>
Explanation:
Let one number = x
Other number = x+2
According to question-
[x] [x+2] = 2400
+ 2x - 2400 = 0
Solving this equation, we get-
[x - 48] [x - 50 ] = 0
x = 48 or 50
Since 48 is the smaller number here, answer is option C
Answer: Tension
Explanation: Fault-block mountains are formed by the movement of large crustal blocks along faults formed when tensional forces pull apart the crust. Tension is often the result of uplifting part of the crust; it can also be produced by opposite-flowing convection cells in the mantle.
