1. Which of the following best shows the transfer of heat by radiation?
my answer: c
2. Which of the following best shows the transfer of heat by convection?
my answer: b
3. Water has specific heat of 4200 J per kilogram per degree celsius. This means that 2 kg of water will release 8400 J of energy when it cools down by 1 degree celsius. True or false?
my answer: True
4. A calorimeter adds calories of heat to a sample. True or False
my answer: false
5. Thermal energy can only be carried or transferred by rapidly moving particles. True or false
my answer: false
6. If heat is added to a sample of material it will always increase in temperature. True or false
my answer: false
WHAT ARE THE ANSWERS I NEED HELP!
1. Incorrect. The correct answer is "d" – electromagnetic waves.
2. Incorrect. The correct answer is "c" – a heating system warming up a room.
3. Correct. True. The specific heat of water is 4200 J/kg°C, so 2 kg of water will release 8400 J of energy when it cools down by 1 degree Celsius.
4. Incorrect. The correct answer is True. A calorimeter is a device used to measure the amount of heat absorbed or released in a chemical or physical process.
5. Incorrect. The correct answer is True. Thermal energy can be carried or transferred by rapidly moving particles, but it can also be transferred by radiation or conduction.
6. Incorrect. The correct answer is True. If heat is added to a sample of material, it will generally increase in temperature, assuming no other factors are at play.
1. To determine which method best shows the transfer of heat by radiation, we need to understand the process. Heat transfer by radiation occurs through electromagnetic waves, such as infrared or visible light. Looking at the options, you have chosen answer 'c'. Unfortunately, as an AI bot, I do not have access to the options you are referring to. However, to identify the best option, look for examples where heat is transferred through electromagnetic waves or form of light.
2. To identify the transfer of heat by convection, we need to understand the process. Convection involves the movement of heat energy through the movement of fluids or gases, transferring energy from one place to another. You have chosen answer 'b'. Again, without knowing the specific options, it is difficult to confirm, but typically options demonstrating the movement of fluids or gases would indicate convection.
3. To determine whether the statement about the specific heat of water is true or false, we need to calculate the energy released when 2 kg of water cools down by 1 degree Celsius. The specific heat capacity of water is given as 4200 J/kg°C. Multiplying the mass of water (2 kg) by the change in temperature (1 °C) and the specific heat capacity (4200 J/kg°C) will give us the energy released. Based on the calculation, if you arrived at 8400 J, then your answer is correct - the statement is true.
4. To determine whether the statement about a calorimeter adding heat to a sample is true or false, we need to understand the purpose of a calorimeter. A calorimeter is a device used to measure the heat absorbed or released during a chemical or physical reaction. It does not add heat to the sample but rather measures the heat change. Therefore, your answer of false is correct - the statement is false.
5. To determine whether the statement about thermal energy being carried or transferred only by rapidly moving particles is true or false, we need to understand thermal energy. Thermal energy is the total kinetic and potential energy of the particles in a substance. It can be transferred through various methods, including conduction, convection, and radiation. These methods do not always involve rapidly moving particles, so your answer of false is correct - the statement is false.
6. To determine whether the statement about heat always increasing the temperature of a sample is true or false, we need to consider the specific conditions and properties of the material. Heat added to a sample can either increase its temperature, cause a phase change (such as melting or boiling), or be used in other chemical or physical processes. Therefore, the statement is false, as heat doesn't necessarily always increase the temperature of a sample - it depends on the circumstances.
Please note that without access to the specific options you mentioned in your questions, I can only provide general explanations and confirmations.
you did not list them so I do not know what c and b are
6. If I add heat it will get hot I think, unless I subtract more heat :)