Question

Chapter 1
Nutrition in Plants
Biology
Chapter 2
Nutrition in Animals Bee
Bilogy
Chapter 3
Fibre to Fabric S Bea
che
Chapter 4
Heat
Physics
Chapter 5
Acids, Bases and Salts
Che
Chapter 6
Physical and Chemical Changes
che
Chapter 7
Weather, Climate and Adaptations of Animals to Climate
Physics
Chapter 8
Winds, Storms and Cyclones
Chapter 9
Soil
Chapter 10
Respiration in Organisms
Brelog
Birey
Chapter 11
Transportation in Animals and Plants
Chapter 12
Reproduction in Plants
Bio




can you say in these which is physics biology and chemistry by the class of 7​

Answer 1

Answer:

We know that  

Sum of measures of two complementary angles= 90

⟹x+y=90.....(i)

But we are given x−y=20.....(ii)

2x=110     [On comparing (i) and (ii)]

⟹x=55

Now, x+y=90

⟹y=90−x

⟹y=90−55=35

Explanation:

Answer 2

Answer:

see the attached file

red is for physics

green is for chemistry

blue is for biology