while studying for this quiz you realize that you still have 100g of lukewarm coffee at 40 degree C left in a paper cup. when you pour 50 g of boiling water into the cup, the temperature of the resulting coffee-like mixture will be now

Q: If you vigorously shake a can of chicken broth back and forth for more than a minute, will the…

A: Yes increases.

Q: Both beakers A and B contain a mixture of ice and water at thermal equilibrium. Which of the breaker…

A:

Q: It is a hot summer day 50 degrees C. How much heat in calories is needed to freeze a puddle of water…

A: The heat energy is absorbed by the water molecules and begin to dissociate from one atom into…

Q: Explain why on a cold day the metal door handle of an automobile feels colder to touch than a…

A: The thermal conductivity of a metal is greater than that of plastic. The difference is in the order…

Q: ou apply a flame to 2 L of water for a certain time and its temperature rises by 2°C. If you apply…

A:

Q: When two cups of hot chocolate, one at 50°C and the other at 60°C, are poured into a bowl, why will…

A: The heat energy always flows from higher temperatures to lower temperatures. When two liquid at…

Q: On a cold winter morning, why does the metal of a bike feel colder than the wood of a porch?

A: The thermal conductivity of the metal of a bike is higher when compared to that of the thermal…

Q: What are the temperatures for freezing water on the Celsius and Fahrenheit scales? For boiling…

A: Two units of measurement of temperature are Fahrenheit and Celsius. The relation between Fahrenheit…

Q: A small metal bar whose initial temperature was 200 degree celcius, is dropped into a large…

A:

Q: Suppose 9.30 x 105J of energy are transferred to 2.00 kg of ice at 0°C. What is the energy required…

A:

Q: Why can’t you establish whether you are running a high temperature by touching your own forehead?

A:

Q: Explain why a cup of water (or soda) with ice cubes stays at 0oC, even on a hot summer day.

A: Thermal equilibrium: If the temperature of the system remains constant, the system is said to be in…

Q: Explain why a cup of water (or soda) with ice cubes stays at 0ºC , even on a hot summer day.

A: The ice and the liquid water (or soda) will be in thermal equilibrium. Therefore, the temperature of…

Q: Which will normally warm faster - a black pot of cold water or a silvered pot of cold water?…

A: The black pot of cold water will normally warm faster than the silvered pot of cold water.

Q: Consider a black spherical ball, with a diameter of 25 cm, is being suspended in air. Determine the…

A: Given:  Diameter, D = 25cm = 0.25 m    mass, m = 10 kg  T = 20 degree C  T' = 30 degree C   Time, t…

Q: Why will wrapping a bottle in a wet cloth for an outing often produce a cooler bottle than placing…

A: Wrapping a bottle in a wet cloth for an outing often produces a cooler bottle than placing the…

Q: A 4.95 g silver spoon at 22.0°C placed in a cup of coffee at . How much heat does the spoon absorb…

A: mass of silver spoon (m) = 4.95 g = 0.00495 kg Initial temperature (t) = 22o C Final temperature (T)…

Q: Which is largest unit of heat transfer- Calorie, calorie, joule?

A:

Q: An electric fan not only doesn’t decrease the temperature of air, but it actually increases air…

A: Given:  an electric fan

Q: Consider 1 kg of water that is heated from -50 °C to 120 °C. The material will have its lowest…

A: Given 1 kg of water is heated from -50 c to 120 c As we increase temperature, the density of…

Q: Cite two reasons why firewalkers don't burn their wetted feet when walking barefoot on red hot…

A: The conductivity of red hot coal is very low. They conduct heat at a very slow rate. When the…

Q: A 0.7-kg glass bowl (celass= 0.2 kcal/kg°C) and a 0.7 kg iron pan (Ciron= 0.11 kcal/kg°C) have a…

A: Given data *The mass of the glass bowl is mg = 0.7 kg *The specific heat capacity of glass is cg =…

Q: An old method for breaking boulders was to put them in a hot fire and then to douse them with cold…

A: This is because of sudden thermal expansion and contraction

Q: A cake is removed from an oven at 200 degrees F and left to cool at room temperature, which is 56…

A:

Q: There is more than a single reason why pouring a cup of hot coffee into a saucer results in faster…

A: Cup is generally manufactured with insulating material. So, coffee remain hot in cup for long time…

Q: How much joules is needed to raise the temp of 8.0 L of water from 0 degrees C to 83 degrees C?

A:

Q: Why is it incorrect to say that, when a hot object warms a cold one, the increase in temperature of…

A: To describe Why is it incorrect to say that, when a hot object warms a cold one, the increase in…

Q: What evidence can you cite for the claim that water can boil at a temperature of 0°C?

A: The boiling point of water at standard atmospheric pressure is hundred degree Celsius. The boiling…

Q: The length of a copper bar increased by 0.0004 m when it was heated from its initial temperature of…

A:

Q: You apply a flame to 1 L of water for a certain time and its temperature rises by 2°C. If you apply…

A: Q = m C dt  Q is the heat applied  m is the mass / quantity of the material C is the specific heat…

Q: you are trying to keep your house warm in the winter. using the idea of conduction, convection, and…

A: Conduction is the transfer of energy from more energetic particles of a substance to adjacent less…

Q: In a meeting room, there are chairs, a table, and people. Which of these things has a temperature…

A: A room is filled with inanimate as well as animate things.

Q: You apply a flame to 2 L of water for a certain time and its temperature rises by 2°C. If you apply…

A: You apply a flame to 2 L of water for a certain time and its temperature rises by 2°C. If you apply…

Q: Why is there a need for a quick transfer of the hot shots into the water in the calorimeter?

A: The transfer hot shots into the water in calorimeter should be done as quick as possible.

Q: Calculate the quantity of heat absorbed by 20g of water that warms from 30 degree C- 90 degree C?

A: The equation for the heat absorbed is given by,