CBSE Class 9- Maths - Surface Areas and Volumes - NCERT EXERCISE 13.8 (#ncertsolutions) (#cbsenotes)

Surface Areas and Volumes - Spheres

Class 9 - Maths - NCERT EXERCISE 13.8

Q1: Find the volume of a sphere whose radius is

(i) 7 cm

(ii) 0.63 m


Answer:
(i) Given, r = 7 cm
Volume of sphere = (4/3)πr³
= (4/3) × (22/7) × (7)³
= 1437⅓ cm³

(ii) Given,  r = 0.63 m
Volume of sphere = (4/3)πr³
= (4/3) × (22/7) × (0.63)³
= 1.05 m³ (approx)

CBSE Class 7 - Geography - Human Environment Interaction - Tropical and Sub-Tropical Region (Assignment) (#cbsenotes)

Human Environment Interaction -
Tropical and Sub-Tropical Region

Class 7 - Geography - Assignment

 

Amazon Basin
image credits: wikpedia

Q1: Define the following terms:

(a) Tributaries
(b) River Mouth
(c) Equatorial Region
(d) Population Density
(e) Cash crops


Q2: Name the countries of the Amazon basin through which equator passes?


Q3: What is the main occupation of the people of the Amazon rain forest?


Q4: Name two types of houses in which Amazon families live.

CBSE Class 9 - Science Pre-SA2 Sample Question Paper (2016-17) (#cbsepapers)

CBSE Class 9  - Science Pre-SA2 Sample Question Paper (2016-17)

CBSE Class 10 - Science Pre-board SA2 Sample Question Paper (2016-17)

CBSE Class 10  - Science Pre-board SA2 Sample Question Paper (2016-17)

CBSE Class 12 - Chemistry Sample Question Paper and Marking Scheme (2016-17) (#cbsepapers)

CBSE Class 12  - Chemistry Sample Question Paper and Marking Scheme (2016-17)

CBSE Class 12 - Chemistry - Chemistry in Everyday Life (Very Short Q and A) (#cbsenotes)

Chemistry in Everyday Life 

Very Short Q and A based on NCERT Class 12  Chemistry text book. 


Q1: Define the term chemotherapy?

Answer: Treatment of diseases using chemicals for therapeutic effect is called chemotherapy.


Q2: What are competitive inhibitors?

Answer: Drug complete with natural substrate for their attachments on the active sites of enzymes .They are called competitive inhibitors.


Q3: Why do we require artificial sweetening agents?

Answer: To reduce calorie intake.


Q4: What are antagonists drugs?

Answer: The drugs that bind to the receptor site and inhibit its natural function.

CBSE Class 9 - Hindi (B) Pre-SA2 Sample Question Paper (2016-17)

CBSE Class 9  - Hindi (B) Pre-SA2 Sample Question Paper (2016-17)