As the **temperature of the matter increases**, the average kinetic energy of the atoms increases and they start to vibrate faster. Due to this the matter expands. So, temperature is the factor which cause expansion.

As the **temperature of the matter increases**, the average kinetic energy of the atoms increases and they start to vibrate faster. Due to this the matter expands. So, temperature is the factor which cause expansion.

Explanation: Graphite is a **solid lubricant**.

**As you heat something up the volume increases so the density decreases**. Water is a bad example, it does not follow the standard rules. Its volume is smallest at about 4°C. As you cool or heat it from this point the water will expand.

The expansion of alcohol in a thermometer is one of many commonly encountered examples of thermal expansion, which is **the change in size or volume of a given system as its temperature changes**. The most visible example is the expansion of hot air.

**How to Calculate Thermal Linear Expansion**

- Find the original length of the object.
- Find the coefficient of thermal linear expansion.
- Find the initial temperature.
- Find the final temperature.
- Calculate the change in length.
- Verify The Result.
- Calculate the Sensitivity Coefficient (Optional)

The thermal strain is defined as(5.3. 1)**εt=∫TcureTαdTwhere α is the coefficient of thermal expansion (CTE) and T is temperature**.

What are the lubricants used for railway tracks? Explanation: For railway tracks, the lubricants used are **solid lubricants** as they are exposed to sun light and must bear the other climatic conditions.

THE COEFFICIENT OF LINEAR thermal expansion (CTE, a, or a_{1}) is **a material property that is indicative of the extent to which a material expands upon heating**. Different substances expand by different amounts.

**Heat causes the molecules to move faster**, (heat energy is converted to kinetic energy ) which means that the volume of a gas increases more than the volume of a solid or liquid. However, gases that are contained in a fixed volume cannot expand - and so increases in temperature result in increases in pressure.

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Thermal expansion is **the tendency of matter to change in shape, area, and volume in response to a change in temperature**. All three states of matter (solid, liquid and gas) expand when heated.

VI improvers (also known as viscosity modifiers) are **additives that increase the viscosity of the fluid throughout its useful temperature range**.

An object's kinetic energy is **based on its mass and velocity, the speed and direction of movement**. So, the heavier an object is, and the faster it's moving, the more kinetic energy it has. In fact, if you double the mass of an object, you double its kinetic energy.

The formula for calculating kinetic energy (KE) is **KE = 0.5 x mv ^{2}**. Here m stands for mass, the measure of how much matter is in an object, and v stands for velocity of the object, or the rate at which the object changes its position.

A perfectly elastic collision is defined as one in which there is no loss of kinetic energy in the collision. An inelastic collision is one in which part of the kinetic energy is changed to some other form of energy in the collision.

Transferring energy can be in the form of force. This amount of energy transferred by the force to move an object is called work or work done. Thus, **the relation between Work and Energy is direct**. That is, the difference in the Kinetic energy of an object is work done by an object.

If an object is rolling without slipping, then its kinetic energy can be expressed as **the sum of the translational kinetic energy of its center of mass plus the rotational kinetic energy about the center of mass**.

The reason it is half the volume of the bar and not the full volume (as in the incorrect Part the First analysis) is **because we are considering the work done by a constant force accelerating an object which is initially at rest**; the velocity of the object increases gradually from zero as the force acts upon it.

For a monatomic ideal gas, each of the three directions (x, y, and z) contribute **1/2 kT per molecule**, for a total of 3/2 kT per molecule.

Rotational kinetic energy is **directly proportional to the rotational inertia and the square of the magnitude of the angular velocity**.

Dated : 08-Jun-2022

Category : Education