Question
What is change of state? What are the two special things for this and what are the main activities of change of state?
✓
Answer
SELF
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Find the maximum magnifying power of a compound Microscope having a $25$ diopter lens as the objective, a $5$ diopter lens as the eyepiece and the separation $30cm$ between the two lenses. The least distance for clear vision is $25cm$.
→Explain the following :
(a) Rise of liquid in capillary of insufficient length,
(b) effect of detergents.
(a) Rise of liquid in capillary of insufficient length,
(b) effect of detergents.
Define density and relative density and write the value of density of the following substances - mercury, glycerine, iron.
The monkey B shown in figure is holding on to the tail of the monkey A which is climbing up a rope. The masses of the monkeys A and B are 5kg and 2kg respectively. If A can tolerate a tension of 30N in its tail, what force should it apply on the rope in order to carry the monkey B with it? Take $g = 10m/s^2$
→An ideal gas is kept in a long cylindrical vessel fitted with a frictionless piston of cross-sectional area $10cm^2$ and weight $1kg$ (figure.) The vessel itself is kept in a big chamber containing air at atmospheric pressure $100kPa$. The length of the gas column is $20cm$. If the chamber is now completely evacuated by an exhaust pump, what will be the length of the gas column? Assume the temperature to remain constant throughout the process.
→A particle executes simple harmonic motion with an amplitude of 10cm and time period 6s. At t = 0 it is at position x = 5cm going towards positive x-direction. Write the equation for the displacement x at time t. Find the magnitude of the acceleration of the particle at t = 4s.
A capacitor having a capacitance of $100\mu\text{F}$ is charged to a potential difference of $50V$.
→- What is the magnitude of the charge on each plate?
- The charging battery is disconnected and a dielectric of dielectric constant $2.5$ is inserted. Calculate the new potential difference between the plates.
- What charge would have produced this potential difference in absence of the dielectric slab.
- Find the charge induced at a surface of the dielectric slab.
A satellite orbits the earth at a height of 400 km above the surface. How much energy must be expended to rocket the satellite out of the earth's gravitational influence? Mass of the satellite $=200 \mathrm{~kg}$; mass of the earth $=6.0 \times$ $10^{24} \mathrm{~kg}$; radius of the earth $=6.4 \times 10^6 \mathrm{~m} ; \mathrm{G}=6.67 \times 10^{-11} \mathrm{~N} \mathrm{~m}^2 \mathrm{~kg}^{-2}$.
→A girl riding a bicycle with a speed of $5m/ s$ towards north direction, observes rain falling vertically down. If she increases her speed to $10m/ s$, rain appears to meet her at $45°$ to the vertical. What is the speed of the rain? In what direction does rain fall as observed by a ground based observer?
(Hint: Assume north to be $\hat{\text{i}}$ direction and vertically downward to be $-\hat{\text{j}}$. Let the rain velocity $\text{v}_\text{r}$ be $\text{a}\hat{\text{i}}+\text{b}\hat{\text{j}}.$ The velocity of rain as observed by the girl is always $V_r-V_{girl}$. Draw the vector diagram/s for the information given and find a and b. You may draw all vectors in the reference frame of ground based observer)
→(Hint: Assume north to be $\hat{\text{i}}$ direction and vertically downward to be $-\hat{\text{j}}$. Let the rain velocity $\text{v}_\text{r}$ be $\text{a}\hat{\text{i}}+\text{b}\hat{\text{j}}.$ The velocity of rain as observed by the girl is always $V_r-V_{girl}$. Draw the vector diagram/s for the information given and find a and b. You may draw all vectors in the reference frame of ground based observer)
An air bubble of radius $2.0mm$ is formed at the bottom of a $3.3m$ deep river. Calculate the radius of the bubble as it comes to the surface. Atmospheric pressure = $1.0 \times 10^5$ Pa and density of water = $1000kg/m^{-3}$.
→