Premium Online Home Tutors

3 Tutor System

Starting just at 265/hour

(a) 293K (b) 470K

Answer :

In this question, we have to convert the given temperatures from Kelvin to Celsius scale .

As we know that

**Temperature in kelvin = 273 + Temperature in Celsius**

\( \implies \text{Temperature in Celsius} \) = \( \text{Temperature in Kelvin} - 273 \)

Now we will apply the above formula in

(a) \( 293K= (293 – 273)°C = 20°C \)

(b) \( 470K= (470 – 273)°C = 197°C \)

- Convert the following temperatures to the Kelvin scale. (a) \( 25°C \) (b) \( 373°C \)
- Give reason for the following observations: (a) Naphthalene balls disappear with time without leaving any solid. (b) We can get the smell of perfume while sitting several metres away.
- Arrange the following in increasing order of forces of attraction between the particles – water, sugar, oxygen.
- What is the physical state of water at – (a) 25°C (b) 0°C (c) 100°C?
- 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 273K more effective in cooling than water at the same temperature?
- What produces more severe burns, boiling water or steam?
- Name A, B, C, D, E and F in the following diagram showing a change in its state.

- NCERT solutions for class 9 maths chapter 1 Number Systems
- NCERT solutions for class 9 maths chapter 2 Polynomials
- NCERT solutions for class 9 maths chapter 3 Coordinate geometry
- NCERT solutions for class 9 maths chapter 4 Linear equations in two variables
- NCERT solutions for class 9 maths chapter 5 Introduction to Euclidean Geometry
- NCERT solutions for class 9 maths chapter 6 Lines and Angles
- NCERT solutions for class 9 maths chapter 7 Triangles
- NCERT solutions for class 9 maths chapter 8 Quadrilaterals
- NCERT solutions for class 9 maths chapter 9 Areas of parallelograms and triangles
- NCERT solutions for class 9 maths chapter 10 Circles
- NCERT solutions for class 9 maths chapter 11 Constructions
- NCERT solutions for class 9 maths chapter 12 Heron's Formula
- NCERT solutions for class 9 maths chapter 13 Surface areas and volumes
- NCERT solutions for class 9 maths chapter 14 Statistics
- NCERT solutions for class 9 maths chapter 15 Probability

- NCERT solutions for class 9 science chapter 1 Matter in our Surroundings
- NCERT solutions for class 9 science chapter 2 Is Matter Around Us Pure
- NCERT solutions for class 9 science chapter 3 Atoms and Molecules
- NCERT solutions for class 9 science chapter 4 Structure of the Atom
- NCERT solutions for class 9 science chapter 5 The Fundamental Unit of Life
- NCERT solutions for class 9 science chapter 6 Tissues and Fundamental unit of life
- NCERT solutions for class 9 science chapter 7 Diversity in Living Organisms
- NCERT solutions for class 9 science chapter 8 Motion
- NCERT solutions for class 9 science chapter 9 Force and Laws of Motion
- NCERT solutions for class 9 science chapter 10 Gravitation
- NCERT solutions for class 9 science chapter 11 Work and Energy
- NCERT solutions for class 9 science chapter 12 sound
- NCERT solutions for class 9 science chapter 13 Why do We Fall Ill
- NCERT solutions for class 9 science chapter 14 Natural Resources
- NCERT solutions for class 9 science chapter 15 Improvement in Food Resources