# AP PHYSICS ~ Thermal Properties ~ A heat transfer of

• Silverbolt
In summary, heat transfer is the movement of thermal energy between objects or systems through conduction, convection, or radiation. In AP Physics, heat is measured in joules (J) and can be affected by factors such as temperature difference, thermal conductivity, surface area, and distance. Specific heat is the amount of energy needed to raise the temperature of one gram of a substance, while heat capacity is the amount needed to raise the temperature of an entire object. Heat transfer affects the temperature of an object by either increasing or decreasing it due to the transfer of thermal energy and the resulting change in particle vibration.
Silverbolt
A heat transfer of 9.5 x 10^5 J is required to convert a block if ice at -15°C to water at 15°C. What is the mass of the block of ice?

So do I have to use the equation; Q= mcΔT ? and Q= mL ? And if so how do I use it?

Silverbolt said:
So do I have to use the equation; Q= mcΔT ? and Q= mL ? And if so how do I use it?

Yes and Yes and Tell us how you think you would use these equations.

## 1. What is a heat transfer?

A heat transfer is the movement of thermal energy from one object or system to another. This can occur through conduction, convection, or radiation.

## 2. How is heat measured in AP Physics?

In AP Physics, heat is measured in units of joules (J). This unit is equivalent to a kilogram-meter squared per second squared (kg*m^2/s^2) in the SI system.

## 3. What factors affect the rate of heat transfer?

The rate of heat transfer can be affected by several factors, including the temperature difference between the two objects, the thermal conductivity of the materials, the surface area of contact, and the distance between the objects.

## 4. What is the difference between specific heat and heat capacity?

Specific heat is the amount of energy required to raise the temperature of one gram of a substance by one degree Celsius, while heat capacity is the amount of energy required to raise the temperature of an entire object or system by one degree Celsius. Specific heat is an intrinsic property of a substance, while heat capacity depends on the mass and composition of the object.

## 5. How does heat transfer affect the temperature of an object?

When heat is transferred to an object, its temperature will increase. Conversely, when heat is transferred away from an object, its temperature will decrease. This is due to the transfer of thermal energy, which causes the particles in the object to vibrate more or less, resulting in a change in temperature.

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