Question

which of the following are co-prime numbers 15 &37,
30 &415 , 17&68, 216&215 ,81&16​

Answer 1

Answer:

t4 tf for a while now I am not sure if he will be the same person I am not going through gills or aaj and he will not be a part

Step-by-step explanation:

E4. How can we say that burning of a candle is a chemical change but the glowing of bulb is a physical change ?

ans)Burning of a candle is a chemical change because after burning the candle it changes into water vapour and carbon dioxide which is a new substance.

Glowing of bulb is a physical change because when we switch on the bulb glows and when we switch off the bulb retain its

Glowing of bulb is a physical change because when we switch on the bulb glows and when we switch off the bulb retain its original condition here no new substances are formed .E4. How can we say that burning of a candle is a chemical change but the glowing of bulb is a physical change ?

ans)Burning of a candle is a chemical change because after burning the candle it changes into water vapour and carbon dioxide which is a new substance.

Glowing of bulb is a physical change because when we switch on the bulb glows and when we switch off the bulb retain its original condition here no new substances are formed .E4. How can we say that burning of a candle is a chemical change but the glowing of bulb is a physical change ?

ans)Burning of a candle is a chemical change because after burning the candle it changes into water vapour and carbon dioxide which is a new substance.

Glowing of bulb is a physical change because when we switch on the bulb glows and when we switch off the bulb retain its original condition here no new substances are formed .E4. How can we say that burning of a candle is a chemical change but the glowing of bulb is a physical change ?

ans)Burning of a candle is a chemical change because after burning the candle it changes into water vapour and carbon dioxide which is a new substance.

Glowing of bulb is a physical change because when we switch on the bulb glows and when we switch off the bulb retain its original condition here no new substances are formed .E4. How can we say that burning of a candle is

Answer 2

Co-prime are numbers that do not share any common factors except 1

Question (a);

Prime factors of 18 = 2 x 3²

Prime factors of 35 = 5 x 7

HCF = 1

Answer: Yes, they are co-prime

Question (b);

Prime factors of 15 = 3 x 5

Prime factors of 37 = 37

HCF = 1

Answer: Yes, they are co-prime

Question (c);

Prime factors of 30 = 2 x 3 x 5

Prime factors of 415 = 5 x 83

HCF = 5

Answer: No, they are not co-prime

Question (d);

Prime factors of 17 = 17

Prime factors of 68 = 2² x 17

HCF = 17

Answer: No, they are not co-prime

Question (e);

Prime factors of 216 = 2³ x 3³

Prime factors of 215 = 5 x 43

HCF = 1

Answer: Yes, they are co-prime

Question (f);

Prime factors of 81 = 3⁴

Prime factors of 16 = 2⁴

HCF = 1

Answer: Yes, they are co-prime