EOG Review: Heat Transfer
5 of 55 of 5 Items
Question
Priya is making a cup of instant hot chocolate. She puts the hot chocolate mix and hot water into a ceramic cup, stirs the mixture, and waits for it to cool a little, as shown in the picture.
A few minutes later, she notices the cup and the spoon have gotten hot. What made Priya's cup and spoon get hot?
Responses
Heat was conducted to the cup and spoon when the hot water molecules collided frequently with the cooler molecules in the cup and spoon and transferred heat.
Heat was conducted to the cup and spoon when the hot water molecules collided frequently with the cooler molecules in the cup and spoon and transferred heat.
Heat was conducted to the cup and spoon when the hot water molecules flowed in currents through the cooler molecules of the hot chocolate mix and transferred heat.
Heat was conducted to the cup and spoon when the hot water molecules flowed in currents through the cooler molecules of the hot chocolate mix and transferred heat.
Heat was convected to the cup and spoon when the hot water molecules radiated into the cooler molecules of the hot chocolate mix and transferred heat.
Heat was convected to the cup and spoon when the hot water molecules radiated into the cooler molecules of the hot chocolate mix and transferred heat.
Heat was convected to the cup and spoon when the hot water molecules moved through the cooler molecules in the surrounding air and transferred heat.
The correct response is: Heat was conducted to the cup and spoon when the hot water molecules collided frequently with the cooler molecules in the cup and spoon and transferred heat.
Well, it seems that the cup and spoon got hot because they were feeling a little left out. The hot water molecules were just trying to show them some warmth and decided to transfer some heat through conduction. It's like a little game of pass the heat! So, in this case, heat was conducted to the cup and spoon when the hot water molecules collided with the cooler molecules and transferred that cozy feeling.
The correct answer is:
Heat was conducted to the cup and spoon when the hot water molecules collided frequently with the cooler molecules in the cup and spoon and transferred heat.
The correct answer is: Heat was conducted to the cup and spoon when the hot water molecules collided frequently with the cooler molecules in the cup and spoon and transferred heat.
To understand why the cup and spoon got hot, we need to understand the concept of heat transfer. Heat transfer is the process of the movement of thermal energy from one object or substance to another due to a temperature difference. In this scenario, the cup and spoon are initially at room temperature, while the hot water is at a higher temperature.
When Priya pours the hot water into the cup and stirs it, heat is transferred from the hot water to the cup and the spoon. This transfer of heat occurs through a process called conduction. Conduction is the transfer of heat through direct contact between two objects or substances. In this case, the hot water molecules collide with the cooler molecules in the cup and spoon, transferring heat to them. This collision of particles transfers thermal energy and causes the cup and spoon to get hot.
It's important to note that the other options listed in the responses, such as convection and radiation, do not apply to this specific scenario. Convection involves the movement of hot fluid or gas, but there is no fluid or gas involved in this case. Radiation is the transfer of heat through electromagnetic waves, which is also not relevant here.
Therefore, the correct answer is: Heat was conducted to the cup and spoon when the hot water molecules collided frequently with the cooler molecules in the cup and spoon and transferred heat.