Formulas
How do you find GPE?
Weight x height (Joules)
What is energy?
Energy is the capability to do work on a system or object and how it is transferred.
What is potential energy?
It is the energy stored in an object that can be converted to different form when a force acts on it.
Earth's interior vs. sun interior and their reactions.
Nuclear reactions in the earth create geothermal energy. Nuclear fission happens in the earth through radioactive decay of some elements. The sun has Nuclear fusion. These reactions keep the sun stable and releases electromagnetic radiation which eventually becomes light for earth.
What is the first law of thermodynamics?
It is the law of conservation of energy and it states that energy can't be created or destroyed.
What is the more significant factor in kinetic energy
Velocity
What is an example of a force?
Friction is a force that is always there when something is touching something else. Gravity is also always acting on objects. A magnetic force, applied force, tension, etc.
What is mechanical energy?
It is the total potential and kinetic energy of an object in respect to its position and motion.
How are the photo____ effects related?
Photothermal effect happens when energy is absorbed and turned into thermal energy and phonons. Photoelectric effect is the energy absorbed may be converted into the kinetic energy. Photochemical effect is the energy may bring about chemical changes which effectively store the energy.
How do you find velocity?
Distance/time
Is any work done if you didn't move an object a distance even if you applied force? Why?
No because the formulas for work is distance x force and anything time 0 is 0.
How are conductivity and resistance related?
Conductivity is how well electricity is conducted and resistanace is the opposite. Energy is transferred this way.
How is chemical energy in food converted into mechanical energy?
It is converted when the blood sugar from it is reacted in the body and it becomes fuel for our muscles to generate mechanical force.
What is the relationship between light and sound?
They both travel in waves with wavelengths and frequencies. However, light is electromagnetic radiation and sound is a mechanical vibration. Light also moves much faster than sound. Light is from the interaction of electric and magnetic fields.
What are the three ways that energy can be converted?
Through actions of forces, when atoms absorb or emit photons of light, and when Nuclear reactions occur.
What is the acceleration formula?
Change in velocity square/time (distance unit/time unit/time unit(m/s/s))
What is a photon and why is it called a wavicle
A little pocket of light. Called a wavicle because it has wave-particle duality and the diffenert wavelengths of the light have waves.
What is electric energy and how is it electricity?
It is the energy from charged electrons in a circuit. Electricity is transmitted by the chain of interactions between electrons on the wire/circuit. Back pressure is needed.
GPE and CPE related to energy forms
GPE and potential energy makes mechanical energy and CPE times kinetic energy makes thermal energy because thermal energy is caused by movement and chemical reactions.
What types of energy are in a pole vaulter?
The pole vaulter gets their kinetic energy from chemical energy (food). As they push off the ground, the kinetic is converted to elastic energy as the pole bends. It is then converted to gravitational potential as they rise up and prepare to fall. When they hit the mat, the energy is transformed to thermal bc of friction.
What is the formula for weight and how is is related to GPE?
Weight is mass x 9.8. It is related to GPE because the rate of acceleration because of gravity is 9.8 m/s/s
How are protons, electrons, and neutrons related to energy?
Electrons can create currents of electricity, therefore electrical energy. Protons and neutrons (positive and neutral charge) helps bonds and energy transferring.
What are all the properties of energy?
Energy can be transferred, Energy comes in many forms, energy can't be destroyed or created, and energy can be converted in between forms.
Sound and electromechanical energy related to other forms.
Sound travels through the air in waves with the potential and kinetic energy of the air molecules. Electromechanical energy is the transferring power through mehcanical and electrical forms with magnets or other mediums.
How is Einstein's theory of special relativity related to energy and mass conversion?
It says E=MC2, meaning that the total energy in an object is the mass times the speed of light squared. It helps show how energy isn't destroyed in Nuclear reactions and how they work. There is more energy than you think that comes from a nucleus being split open.