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Give some points of differences between heat and temperature.
1. Heat is the energy transferred between systems because of a temperature difference, and temperature is the measure of the average kinetic energy of particles in a substance. 2. Heat is measured in joules (J) or calories, while temperature is measured in Celsius (°C), Fahrenheit (°F), or Kelvin (KRead more
1. Heat is the energy transferred between systems because of a temperature difference, and temperature is the measure of the average kinetic energy of particles in a substance.
2. Heat is measured in joules (J) or calories, while temperature is measured in Celsius (°C), Fahrenheit (°F), or Kelvin (K).
3. Heat depends on mass, type of material, and temperature change while temperature is independent of mass.
4. Heat can be transferred through conduction, convection, or radiation while temperature determines the direction of heat flow.
5. Heat causes a change in the internal energy or state of a substance while temperature measures the intensity of heat within the substance.
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What is a liquid thermometer ? What are the advantages of using mercury as a thermometric substance over other liquids?
A liquid thermometer is a liquid-in-glass thermometer that makes use of the expansion or contraction of a liquid to measure temperature. The most liquid used in thermometers are mercury and alcohol. The change in the rise in volume of the liquid used in the thermometer owing to the rise in the tempeRead more
A liquid thermometer is a liquid-in-glass thermometer that makes use of the expansion or contraction of a liquid to measure temperature. The most liquid used in thermometers are mercury and alcohol. The change in the rise in volume of the liquid used in the thermometer owing to the rise in the temperature is scaled on a calibrated scale to indicate temperature.
Advantages of using mercury as a thermometric substance over other liquids:
1. High Boiling Point: Mercury boils at a relatively high temperature of around 356°C. This characteristic makes it suitable for measuring high temperatures without evaporating.
2. Uniform Expansion: Mercury expands uniformly with temperature change, thus ensuring accurate readings.
3. Good Visibility: Mercury has a shiny metallic appearance, which is also easy to see, especially in the very narrow capillary tube of a thermometer.
4. Mercury is not volatile and hence non-volatile which makes it non-evaporate at room temperatures; this stability allows its longevity.
5. It possesses great thermal conductivity so gives rapid temperature variation reading
6. Non-reaction mercury. The nature is such that chemical reaction is slow or hard which makes sure the chemical interaction between substances is hard or slower due to inert.
Although these have several advantages, mercury thermometers are less commonly used today because of environmental and health concerns related to mercury toxicity.
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What do you mean by ideal gas temperature? Does it depend on nature of the gas?
Ideal gas temperature refers to the temperature at which the behavior of the gas is based on the ideal gas law. According to the ideal gas law, gas particles do not interact with one another except for in an elastic collision. Temperature, in an ideal gas, is proportional to the average kinetic enerRead more
Ideal gas temperature refers to the temperature at which the behavior of the gas is based on the ideal gas law. According to the ideal gas law, gas particles do not interact with one another except for in an elastic collision. Temperature, in an ideal gas, is proportional to the average kinetic energy of the molecules of the gas.
The nature of the gas does not depend on its ideal gas temperature. For an ideal gas, every gas is pretty much the same; the temperature is a measure of average kinetic energy of the particles. The ideal gas law (PV = nRT) considers that the gases are in the form of non-interacting particles. This assumption in itself is quite valid for many gases, if their nature were concerned when operating at high temperature and low pressure.
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When a body of mass M is hung from a spring, the spring extends by 1 cm. If the body of mass 2 M be hung from the same spring, the extension of spring will be
According to Hooke's Law, an applied force directly stretches a spring and is defined by the formula given below. F = kx Here: - F refers to the force applied - k refers to the spring constant - x refers to the extension of the spring. When the mass M is hung on the spring, the force applied is F1 =Read more
According to Hooke’s Law, an applied force directly stretches a spring and is defined by the formula given below.
F = kx
Here:
– F refers to the force applied
– k refers to the spring constant
– x refers to the extension of the spring.
When the mass M is hung on the spring, the force applied is F1 = Mg where g is acceleration due to gravity and the extension is x1 = 1 cm.
Now, if the mass is doubled to 2M then the force applied will be F2 = 2Mg, and the extension will be x2.
By using the proportionality between force and extension:
x2 / x1 = F2 / F1
x2 / 1 cm = 2Mg / Mg = 2
Therefore, the extension x2 = 2 cm.
The correct answer is: 2 cm
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Which of the following has no dimensions?
The quantity that has no dimensions is: strain Strain is defined as the ratio of change in length to the original length, so it is a dimensionless quantity. The other quantities like angular velocity, momentum, and angular momentum have dimensions. Click for more: https://www.tiwariacademy.com/ncertRead more
The quantity that has no dimensions is: strain
Strain is defined as the ratio of change in length to the original length, so it is a dimensionless quantity.
The other quantities like angular velocity, momentum, and angular momentum have dimensions.
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