Question
Explain the concept of internal energy.
✓
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
A train, standing in a station-yard, blows a whistle of frequency $400Hz$ in still air. The wind starts blowing in the direction from the yard to the station with a speed of $10m s^{–1}$. What are the frequency, wavelength, and speed of sound for an observer standing on the station’s platform? Is the situation exactly identical to the case when the air is still and the observer runs towards the yard at a speed of $10m s^{–1}$? The speed of sound in still air can be taken as $340m s^{–1}$.
→Define co-efficient of linear expansion coefficient of areal expansion and coefficient of volume expansion and obtain mutual relation between them.
Figure shows a plot of the transverse displacements of the particles of a string at t = 0 through which a travelling wave is passing in the positive x-direction. The wave speed is 20cm/s. Find-
-
The amplitude
-
The wavelength
-
The wave number
-
The frequency of the wave.
Toricelli’s barometer used mercury. Pascal duplicated it using French wine of density $984kg m^{–3}$. Determine the height of the wine column for normal atmospheric pressure.
→In a simple Atwood machine, two unequal masses $m_1$ and $m_2$ are connected by a string going over a clamped light smooth pulley. In a typical arrangement $m_1 = 300g$ and $m_2 = 600g$. The system is released from rest.
→- Find the distance travelled by the first block in the first two seconds.
- Find the tension in the string.
- Find the force exerted by the clamp on the pulley.
A cylinder with a movable piston contains $3$ moles of hydrogen at standard temperature and pressure. The walls of the cylinder are made of a heat insulator, and the piston is insulated by having a pile of sand on it. By what factor does the pressure of the gas increase if the gas is compressed to half its original volume?
→A beam of white light is incident normally on a plane surface absorbing 70% of the light and reflecting the rest. If the incident beam carries 10W of power, find the force exerted by it on the surface.
Let us take the position of mass when the spring is unstretched as $x=0$ and the direction from left to right as the positive direction of x -axis. Given x as a function of time t for the oscillating mass, if at the moment we start the stopwatch $(t=0)$, the mass is
i. at the mean position,
ii. at the maximum stretched position and
iii. at the maximum compressed position.
In what way do these functions for SHM differ from each other, in frequency, in amplitude or the initial phase?
→i. at the mean position,
ii. at the maximum stretched position and
iii. at the maximum compressed position.
In what way do these functions for SHM differ from each other, in frequency, in amplitude or the initial phase?
When a body slides down from rest along a smooth inclined plane making an angle of 45° with the horizontal, it takes time T. When the same body slides down from rest along a rough inclined plane making the same angle and through the same distance, it is seen to take time pT, where p is some number greater than 1. Calculate the co-efficient of friction between the body and the rough plane.
Derive an expression for the moment of inertia of a thin uniform rod about an axis passing through its one end and perpendicular to its length. Also determine the radius of gyration about the same axis.