5 Examples of situation or object that uses convection current

Q: Water is to be boiled at sea level in a 30-cm-diameter stainless steel pan placed on top of a 3-kW…

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Q: 8- What is the heat in the area when 20 grams of water cools from 90°C to 30°C? Note that the…

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Q: Water vapor is an invisible gas. How can an increase in relative humidity affect visibility?

A: Water vapour is the gaseous condition of H2O that is imperceptible to the naked eye. Clouds are…

Q: You have 4,178 g of water at 10 °C in a large insulating beaker. How much boiling water (in kg) at…

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Q: 8. In an experiment, a 0.240-kg piece of ceramic superconducting material at 19 °C is placed in…

A: 8. From calorimetric equation is,

Q: Consider a car radiator at 115°C in a 49°C environment and the exchange of heat between them by…

A: Temperature of the car,  Temperature of the environment,  Emissivity of the surface,  Surface area,…

Q: 2. You are sick, and your temperature is 312.0 kelvins. Convert this tem- perature to the Fahrenheit…

A: Kelvin temperature and Celsius temperature is related by,

Q: Define emissivity, Give some examples?

A: The expression for the emissivity is given by,

Q: Define latent heat of vaporisation. Give some examples.

A: Energy required for the change of phase without any change in temperature is called Latent heat.…

Q: Water boils at 120 degree C in a pressure cooker. Explain the reason.

A: We know that, the boiling point of water varies directly with pressure at  constant volume.

Q: Explain how woolen clothes help us in winter against cold.

A: Wool is a bad conductor of heat. Woolen clothes serve as an insulator that prevents body heat from…

Q: Can you explain why concrete feels hot in the summer while water in a pool feels cold

A: The heat capacity of a material is defined as the heat needed to raise the temperature by one…

Q: 25.) Which of the following is a case of heat transfer through convection? Selected Answer: a heat…

A: Three are three modes of heat transfer. Conduction, convection, and radiation. In this question, we…

Q: QUESTION 2 Liquid nitrogen has a boiling point of -195.81°C at atmospheric pressure. Express this…

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Q: 13. How does a thermometer work

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Q: Radiation makes it impossible to stand close to a hot lava flow. Calculate the rate of heat transfer…

A: Given Data The area of the cross-section is A = 1 m2. The temperature of fresh lava is Tl = 1100°C.…

Q: Choose the BEST answer to the following: Newton’s law of cooling applies to objects that (a) cool.…

A: Step 1Newton’s law of cooling states that the rate of heat lost by body is directly proportional to…

Q: 13. Liquid oxygen freezes at -218.4°C and boils at 183°C. Express these temperature in terms of…

A: Given:freeze temperature=-218.4°C          boil temperature=183°Cfahrenheit scale starts from 32°…

Q: Define absolute temperature.

A: If the temperature of an object is measured relative to absolute zero, then the temperature will be…

Q: QUESTION 18 A ball of lead of mass 1kg drops from a height of 46 m, hits the floor and remains there…

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Q: A piece of iron is heated in a flame. It first becomes dull red then becomes reddish yellow and…

A: When a piece of iron is heated in a flame it first becomes dull red then becomes reddish yellow and…

Q: 19) The process in which heat flows by the mass movement of molecules from one place to another is…

A: SOlution:

Q: An infrared heater for a sauna is operated at a power of {352} W and has an emissivity of {0.9}. If…

A: According to Stefan’s law, the power of emission (rate at which energy is emitted) from a source is…

Q: Question 6 There is a window whose dimensions are 1 m by 3 m, and is 10 cm thick. Its separates the…

A: Given: Area of window A=1m×3m=3 m2, Thickness of window d=10 cm=0.10 m, Conductivity of window k=250…

Q: The next four questions use this description. Our Sun has a peak emission wavelength of about 500 nm…

A: Given:-  The wavelength λ = 500 nm  The radius r = 7 x 105 km  The dark-adapted eye has a pupil…

Q: Explain why high quality thermos bottles have a vacuum lining as a major component of their…

A: The transfer of the heat from any substance takes place in three ways, 1. Conduction, 2. Convection…

Q: Which of the following is not a method of transfer of heat? Conduction Radiation Convection…

A: Conduction, Convection & Radiation. There are three main ways that heat is transferred between…

Q: Identify whether the given situations are examples of conduction, convection or radiation. a. Solar…

A: a. Solar ultraviolet radiation, precisely the process that determines the Earth's temperature. It is…

Q: (1) Convert following temperatures (i) 96 °C into Fahrenheit scale (ii) -40 °F into Kelvin scale.

A: (i) Converting Celsius to Fahrenheit Here temperature in Celsius is 96

Q: A 220 J of energy is required to raise the temperature of the temperature of aluminum from 15°C to…

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Q: 4. Taos Ski Valley advertises a vertical drop of 3,281 feet. Use Laplace's law of isothermal…

A: Write the formula for the pressure in the isothermal atmosphere.

Q: What type of heat transfer is seen in the picture? Sun Space Earth O a. convection O b. conduction O…

A: Heat can be transferred via three methods : 1. conduction 2. convection 3. radiation.

Q: Briefly explain why 2° C water cools you off faster than 2° C air.

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Q: The temperature of 0.38 kg of water increases by 2.3 °C after transferring some heat. Calculate the…

A: Given data:  Mass (m) = 0.38 kg Increase in temperature (ΔT) = 2.3 °C Specific heat of water (c) =…

Q: Whenever you directly touch a hot plate, you immediately feel the heat transfer to your hand the…

A: Whenever you directly touch a hot plate, we immediately feel the heat transfer through our  hand  .…

Q: 17. Select ALL of the following that are scales for measuring temperature. O Celsius grams O kelvin…

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Q: Describe the different mechanisms of heat transfer that affect the drying of washing outdoors. Is it…

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Q: QUESTION 10 Convective heat transfer... can be used to cool the solar panels on a satellite is more…

A: (c) is  more effective in a liquid than a gas

Q: 10. Objects in thermal contact will have same temperature. [ True / False ]

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Ideal Gas Law

Ideal gas law states that the product of pressure and volume of a gas directly varies with the product of the number of moles, the universal gas constant, and the temperature of the gas.