yes Flashcards
yes (16 cards)
what factors affect gravitational potential energy?
its height relative to some reference point, its mass, and the strength of the gravitational field it is in. / height and mass
does thermal energy transfer from warmer to cooler vice verse
warmer to cooler - think of heating pads
explain what factors affect how much thermal energy can be stored in an object
The amount of matter or mass and the temperature
what is the law of conservation of energy?
energy is neither created or destroyed
what is the law of conservation of energy? provide an example with a toaster
In a toaster, electrical energy is converted into thermal energy to toast bread, demonstrating this principle.
what are the different types of kinetic energy and potential energy provide examples of how transformations can occur between different forms of kinetic and potential energy
Translational Kinetic Energy: Energy due to the motion of an object moving from one location to another (e.g., a car driving down a road).
Rotational Kinetic Energy: Energy due to the rotation of an object around an axis (e.g., a spinning top or a rotating wheel).
Vibrational Kinetic Energy: Energy from the vibrations of particles in solids (e.g., a guitar string vibrating when plucked).
Gravitational to Kinetic: When you drop a rock from a height, its gravitational potential energy converts to translational kinetic energy as it falls.
Kinetic to Elastic: When a spring is compressed by a moving object, the kinetic energy of the object transforms into elastic potential energy stored in the spring.
Chemical to Kinetic: When you burn fuel in a car engine, the chemical potential energy in the fuel is converted into kinetic energy that moves the car.
These transformations illustrate how energy shifts between kinetic and potential forms while maintaining the overall conservation of energy
what is the difference between energy transfer and energy transformation
Energy transfer is the movement of energy from one location to another. Energy transformation is when energy changes from one type to another
what is the difference between a conductor and an insulator
A conductor allows current to flow easily through it. Insulators don’t allow current to flow through it.
what are the different ways thermal energy can be transferred provide examples for each
Thermal energy can be transferred in three main ways: conduction, convection, and radiation.
- Conduction:
This is the transfer of thermal energy through direct contact between materials. Heat moves from the hotter object to the cooler one.
Example: When you touch a metal spoon that’s been sitting in a hot pot, heat is transferred from the pot to the spoon, warming it up.
- Convection:
This involves the transfer of thermal energy through the movement of fluids (liquids or gases). Warmer, less dense fluid rises, while cooler, denser fluid sinks, creating a circulation pattern.
Example: In a pot of boiling water, the water at the bottom heats up, rises to the top, and cooler water moves down, creating convection currents.
- Radiation:
This is the transfer of thermal energy through electromagnetic waves, such as infrared radiation. It doesn’t require a medium and can occur in a vacuum.
Example: The warmth you feel from the sun is due to radiation; solar energy travels through the vacuum of space and heats your skin when it reaches you.
what is conduction?
when heat moves from one object to another object through direct touch. For instance, one piece of metal could conduct heat from another piece of metal if the two are touching.
what is convection?
The flow of the gas or liquid as a result of this heating An example of convection is the rising of warm air from a heater, which creates a circulation of warm and cool air in a room.
what is radiation
energy that moves from one place to another in a form that can be described as waves or particles
what properties of matter affect how it interacts with solar energy
How materials absorb, reflect, or let through solar energy depends on their properties.
explain how weather patterns can be affected by convection
Convection can cause warm air to rise and cool air to sink, leading to wind and changing weather patterns like storms.
what’s a solar oven and how does it work
A solar oven collects sunlight, changes it into heat, and uses that heat to cook food.
why does placing a reflective film on the windows of a house keep in cool in the summer
By reflecting and absorbing sunlight, it reduces the amount of heat that enters a building
