Tiwari Academy Discussion

Roopa Gangly

Asked: October 22, 2020In: Class 9

Why does our palm feel cold when we put some acetone or petrol or perfume on it?

NCERT Solution for Class 9 Science Chapter 1 Matter in Our Surroundings NCERT Books for Session 2022-2023 CBSE Board and UP Board Intext Questions Page No-10 Questions No-3

Roopa Gangly

Asked: October 22, 2020In: Class 9

Why are we able to sip hot tea or milk faster from a saucer rather than a cup?

NCERT Solution for Class 9 Science Chapter 1 Matter in Our Surroundings NCERT Books for Session 2022-2023 CBSE Board and UP Board Intext Questions Page No-10 Questions No-4

Roopa Gangly

Asked: October 22, 2020In: Class 9

What type of clothes should we wear in summer?

NCERT Solution for Class 9 Science Chapter 1 Matter in Our Surroundings NCERT Books for Session 2022-2023 CBSE Board and UP Board Intext Questions Page No-10 Questions No-5

Tejal Singh

Asked: October 22, 2020In: Class 9

Convert the following temperatures to the Celsius scale.

NCERT Solution for Class 9 Science Chapter 1 Matter in Our Surroundings NCERT Books for Session 2022-2023 CBSE Board and UP Board Exercises Questions Page No-12 Questions No-1 (a) 300 K (b) 573 K.

Tejal Singh

Asked: October 22, 2020In: Class 9

Convert the following temperatures to the Kelvin scale.

NCERT Solution for Class 9 Science Chapter 1 Matter in Our Surroundings NCERT Books for Session 2022-2023 CBSE Board and UP Board Exercises Questions Page No-12 Questions No-2 (a) 25°C (b) 373°C.

Tejal Singh

Asked: October 22, 2020In: Class 9

Give reason for the following observations. (a) Naphthalene balls disappear with time without leaving any solid. (b) We can get the smell of perfume sitting several meters away.

NCERT Solution for Class 9 Science Chapter 1 Matter in Our Surroundings NCERT Books for Session 2022-2023 CBSE Board and UP Board Exercises Questions Page No-12 Questions No-3 (a) Naphthalene balls disappear with time without leaving any solid. (b) We can get ...

Tejal Singh

Asked: October 22, 2020In: Class 9

Arrange the following substances in increasing order of forces of attraction between the particles

NCERT Solution for Class 9 Science Chapter 1 Matter in Our Surroundings NCERT Books for Session 2022-2023 CBSE Board and UP Board Exercises Questions Page No-12 Questions No-4 Arrange the following substances in increasing order of forces of attraction between the ...

Tejal Singh

Asked: October 22, 2020In: Class 9

What is the physical state of water at the following temperature?

NCERT Solution for Class 9 Science Chapter 1 Matter in Our Surroundings NCERT Books for Session 2022-2023 CBSE Board and UP Board Exercises Questions Page No-12 Questions No-5 (a) 25°C (b) 0°C (c) 100°C?

Tejal Singh

Asked: October 22, 2020In: Class 9

Give two reasons to justify: (a) water at room temperature is a liquid. (b) an iron almirah is a solid at room temperature.

NCERT Solution for Class 9 Science Chapter 1 Matter in Our Surroundings NCERT Books for Session 2022-2023 CBSE Board and UP Board Exercises Questions Page No-12 Questions No-6 (a) water at room temperature is a liquid. (b) an iron almirah is ...

Tejal Singh

Asked: October 22, 2020In: Class 9

Why is ice at 273 K more effective in cooling than water at the same temperature?

NCERT Solution for Class 9 Science Chapter 1 Matter in Our Surroundings NCERT Books for Session 2022-2023 CBSE Board and UP Board Exercises Questions Page No-12 Questions No-7

Why does our palm feel cold when we put some acetone or petrol or perfume on it?

Why are we able to sip hot tea or milk faster from a saucer rather than a cup?

What type of clothes should we wear in summer?

Convert the following temperatures to the Celsius scale.

Convert the following temperatures to the Kelvin scale.

Give reason for the following observations. (a) Naphthalene balls disappear with time without leaving any solid. (b) We can get the smell of perfume sitting several meters away.

Arrange the following substances in increasing order of forces of attraction between the particles

What is the physical state of water at the following temperature?

Give two reasons to justify: (a) water at room temperature is a liquid. (b) an iron almirah is a solid at room temperature.

Why is ice at 273 K more effective in cooling than water at the same temperature?

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