# science comp 2

 The flashcards below were created by user Anonymous on FreezingBlue Flashcards. energy in the form of motion kinetic energy SI unit of energy joule stored energy due to postition, can be converted to kinetic energy when something acts to release it potential energy sum of potential and kinetic energy in a system mechanical energy transfer of energy that occurs when a force makes an object move work amount of work done, or the amount of energy transfered in a certain amount of time power device that makes doing work easier machine measure of how much of the work put into a machine is changed into work done by a machine efficiency force exerted on a machine that is used to do work effort force force applied by a machine to overcome resistance resistance force the fixed point on a lever fulcrum machine that does work with only one movement simple machine combination of two or more simple machines compound machine solar heating system device that absorbs radiant energy from the sun solar collector total energy, including kinetic and potential energy of the particles that make up a material thermal energy energy from the sun that is free, renewable, and can be used to heat buildings solar energy device that removes thermal energy from one place and transfers it to another place at a different temperature heat mover material that doesn't allow electrons to move through it easily insulator thermal energy that flows from a warmer material to a cooler material heat a measure of the average kinetic energy of all the particles in an object temperature formula for gravitational potential energy GPE=m*9.8m/s2 * h formula for kinetic energy KE=1/2m * v2 formula for work W=f*dwork = force * distance formula for power P= w/tP= work/time formula for the IMA of an inclined plane IMA= l/hlength/ height formula for the IMA of a wheel and axle IMA= Rw/Raradious of wheel/ radious of axle Formula for the IMA of a lever IMA= Le/Lrlength of effort arm/ length of resistance arm formula for the change in thermal energy Q=m* (Tf-Ti) *CQ= m*(Tf-Ti) * specific heat transfer of energy in the form of electomagnetic waves radiation device that converts thermal energy produced by combustion into mechanical energy heat engine amount of energy needed to raise the temperature of 1kg of a material to 1k specific heat a type of heat engine that burns fuel inside the engine internal combustion engine a unit to measure how much energy you get from food calorie 1c= how many joules? 4,184j 1g of fat= how many calories? 9c9c= 37,656j 1g of carb = how many calories? 4c4c= 16,736j 4 stroke engine 1.intake2.compression3.power4.exhaust 3 types of potential energy 1.Gravitational2.Elastic3.Chemical energy stored by objects above Earth's surface gravitational potential energy energy stored by something that can stretch or compress elastic potential energy energy in chemical bonds chemical potential energy 3 types of levers 1.first class2.second class 3.third class changes direction of applied force first class lever resistance force is between effort force and fulcrum second class lever effort force is located between resistance force and fulcrum third class lever energy is converted from a small amount of mass, atoms added together nuclear fussion converts mass into energy, atoms are broken apart nuclear fission types of machines 1.lever2.pulley3.wheel & axle4.inclined plane5.screw6.wedge7.compound machine a bar that is free to pivot, or turn around a fixed point lever grooved wheel with a rope, chain, or cable running along it pulley two wheels of different sizes that rotate together wheel & axle a sloping surface, ramp inclined plane two or more simple machines are used together compound machine substance used to absorb heat coolant when is work done? 1.object has to move2.moves in direction of applied force human coolant sweat, absorbs heat from body why is water the best coolant? Because it takes the longest to heat up and cool down 3 heating systems 1.forced air2.electric3.radiant what is thermal energy transferred by? conduction, convection, and radiation what is the difference between conduction and convection? conduction is transferred through matter by the direct contact of particles.convection is the transfer of energy in a fluid by movement of heated particles AuthorAnonymous ID68954 Card Setscience comp 2 Descriptionthursday, march Updated2011-03-02T20:16:35Z Show Answers