https://padlet.com/rosamercedes2004/w4vi1w3nxhny en-us 2017-11-10 00:25:32 UTC 2024-05-26 14:45:56 UTC hello@padlet.com rosamercedes2004 https://padlet.com/rosamercedes2004/w4vi1w3nxhny/wish/205547436 Energy describes the abillity of things to change themselves or to cause change in other things. Some examples of this changes are temperature, speed, position, or pressure or any other physical variable. A joule (J) is the unit of measurement of energy.

]]> 2017-11-10 00:26:43 UTC https://padlet.com/rosamercedes2004/w4vi1w3nxhny/wish/205547436 rosamercedes2004 https://padlet.com/rosamercedes2004/w4vi1w3nxhny/wish/205549722 In physical science, mechanical energy is the sum of potential and kinetic energy. Mechanical energy that is related to motion or position.]]> 2017-11-10 00:45:33 UTC https://padlet.com/rosamercedes2004/w4vi1w3nxhny/wish/205549722 rosamercedes2004 https://padlet.com/rosamercedes2004/w4vi1w3nxhny/wish/205550155 In physics , potential energy possessed by an object because of its position relative to other objects, stresses within itself, its electric charge, or other factors.]]> 2017-11-10 00:49:30 UTC https://padlet.com/rosamercedes2004/w4vi1w3nxhny/wish/205550155 rosamercedes2004 https://padlet.com/rosamercedes2004/w4vi1w3nxhny/wish/205550606 Kinetic energy is the energy of motion. Kinetic energy can be easily converted into potential energy.]]> 2017-11-10 00:52:53 UTC https://padlet.com/rosamercedes2004/w4vi1w3nxhny/wish/205550606 rosamercedes2004 https://padlet.com/rosamercedes2004/w4vi1w3nxhny/wish/205553265 Chemical energy is the form of energy stored in the nuclei of atoms (paricles of matter.) Some examples of chemical energy are food, gasoline, and batteries.

]]> 2017-11-10 01:14:04 UTC https://padlet.com/rosamercedes2004/w4vi1w3nxhny/wish/205553265 rosamercedes2004 https://padlet.com/rosamercedes2004/w4vi1w3nxhny/wish/205553485 Radiant energy is the energy of electromagnetic and gravitional radiation.]]> 2017-11-10 01:16:25 UTC https://padlet.com/rosamercedes2004/w4vi1w3nxhny/wish/205553485 rosamercedes2004 https://padlet.com/rosamercedes2004/w4vi1w3nxhny/wish/205553783 Nuclear energy is a form of energy stored in the nuclei of atoms (particles of matter.) Nuclear energy is transformed to heat that eventually escapes the Sun as radiant energy.]]> 2017-11-10 01:19:05 UTC https://padlet.com/rosamercedes2004/w4vi1w3nxhny/wish/205553783 rosamercedes2004 https://padlet.com/rosamercedes2004/w4vi1w3nxhny/wish/205557757 In physics the word work has a very specific meaning. Work is the transfer of energy that results from applying a force over a distance . Work is the force applied times the distance.]]> 2017-11-10 01:51:09 UTC https://padlet.com/rosamercedes2004/w4vi1w3nxhny/wish/205557757 rosamercedes2004 https://padlet.com/rosamercedes2004/w4vi1w3nxhny/wish/205558684 Systems change energy flows and changes from one part of the system to another. Parts of the system may speed up or slow down, get warmer or colder, or change in other measurable ways.]]> 2017-11-10 01:58:07 UTC https://padlet.com/rosamercedes2004/w4vi1w3nxhny/wish/205558684 rosamercedes2004 https://padlet.com/rosamercedes2004/w4vi1w3nxhny/wish/205558926 Energy can never be created or destroyed , energy could just be transformed from one form to another. The total amount of energy in the universe is constant.

]]> 2017-11-10 02:00:18 UTC https://padlet.com/rosamercedes2004/w4vi1w3nxhny/wish/205558926 rosamercedes2004 https://padlet.com/rosamercedes2004/w4vi1w3nxhny/wish/205559137 Work is  a form of energy that comes from force applied over distance. A force of 1 newton does 1 joule of work when the force causes 1 meter of motion in the direction of the force.]]> 2017-11-10 02:02:39 UTC https://padlet.com/rosamercedes2004/w4vi1w3nxhny/wish/205559137 rosamercedes2004 https://padlet.com/rosamercedes2004/w4vi1w3nxhny/wish/205932517 Energy is always required to do work. Doing work always means transferring energy. The energy might  be transferred to the object to which the force is applied to, or it may go somewhere else.

]]> 2017-11-12 00:33:52 UTC https://padlet.com/rosamercedes2004/w4vi1w3nxhny/wish/205932517 rosamercedes2004 https://padlet.com/rosamercedes2004/w4vi1w3nxhny/wish/205932775 Work is only done by the part of a force that acts in the same direction as the resulting motion. Work some against gravity is equal to weight.]]> 2017-11-12 00:37:47 UTC https://padlet.com/rosamercedes2004/w4vi1w3nxhny/wish/205932775 rosamercedes2004 https://padlet.com/rosamercedes2004/w4vi1w3nxhny/wish/205933010 Work input is the work that is done on an object . Work output is the work that an object does as a result of work input. The total energy of work output can never be greater than the total energy of work input.]]> 2017-11-12 00:43:54 UTC https://padlet.com/rosamercedes2004/w4vi1w3nxhny/wish/205933010 rosamercedes2004 https://padlet.com/rosamercedes2004/w4vi1w3nxhny/wish/205933104 Efficiency is the ratio of usable output work divide by total input work. Efficiency is often expressed a percent , with a perfect machine having 100 percent efficiency. A perfect car would have an efficiency of 100 percent.]]> 2017-11-12 00:45:56 UTC https://padlet.com/rosamercedes2004/w4vi1w3nxhny/wish/205933104 rosamercedes2004 https://padlet.com/rosamercedes2004/w4vi1w3nxhny/wish/205933277 Energy drives all the process in nature , from winds in the atmosphere to nuclear reactions occurring in the cores of starts. In the environment , efficiency is interpreted as the fraction of incoming energy that goes into a process.]]> 2017-11-12 00:50:45 UTC https://padlet.com/rosamercedes2004/w4vi1w3nxhny/wish/205933277 rosamercedes2004 https://padlet.com/rosamercedes2004/w4vi1w3nxhny/wish/205933335 Power is the rate of doing work or moving energy. Power is equal to energy (or work) divided by time. Watt (W) is a unit of power equal to 1 joule per second. A horsepower (hp) is a unit of power equal to 746 watts.]]> 2017-11-12 00:52:13 UTC https://padlet.com/rosamercedes2004/w4vi1w3nxhny/wish/205933335 rosamercedes2004 https://padlet.com/rosamercedes2004/w4vi1w3nxhny/wish/205933444 A machine is a device with moving parts that work together accomplish a task. Input in machines is forces , energy , or power supplied to make a machine accomplish a task. The output is what the machine does for you , like going fast or climbing a steep hill.]]> 2017-11-12 00:54:08 UTC https://padlet.com/rosamercedes2004/w4vi1w3nxhny/wish/205933444 rosamercedes2004 https://padlet.com/rosamercedes2004/w4vi1w3nxhny/wish/205933612 A simple machine is an unpowered mechanical device that accomplishes a task with only one movement. Lever is a stiff structure that rotated around a fixed point called a fulcrum. Gear is a rotating wheel with teeth that transfers motion and forces to other gears or objects]]> 2017-11-12 00:57:56 UTC https://padlet.com/rosamercedes2004/w4vi1w3nxhny/wish/205933612 rosamercedes2004 https://padlet.com/rosamercedes2004/w4vi1w3nxhny/wish/205933664 Mechanical advantage is the ratio of output force divided by input force.]]> 2017-11-12 00:59:41 UTC https://padlet.com/rosamercedes2004/w4vi1w3nxhny/wish/205933664 rosamercedes2004 https://padlet.com/rosamercedes2004/w4vi1w3nxhny/wish/205933691 All levers include a stiff structure that rotates around a fulcrum. Levers are useful because you can arrange the fulcrum and input and output arms to adjust the mechanical advantage of the lever. Using the length of the lever arms , mechanical advantage can also be calculated by dividing the length of the input arm by the length of the output arm.]]> 2017-11-12 01:00:28 UTC https://padlet.com/rosamercedes2004/w4vi1w3nxhny/wish/205933691 rosamercedes2004 https://padlet.com/rosamercedes2004/w4vi1w3nxhny/wish/205933761 Gears can transfer motion and force when the teeth of one gear press on the teeth of another gear as each gear rotates around a shaft. A gear ratio is the ratio his output turns to input tubes for a pair of gears.]]> 2017-11-12 01:02:44 UTC https://padlet.com/rosamercedes2004/w4vi1w3nxhny/wish/205933761 rosamercedes2004 https://padlet.com/rosamercedes2004/w4vi1w3nxhny/wish/205933827 The mechanical advantage of a ramp is the ramp length divided by the height of the ramp. A ramp is a simple machine that allows you to raise a heavy object , such as a wheeled cart, with less force than you would need to lift it straight up. A wedge is like a ramp that can work while in motion (a ramp is always stationary.) A wheel rotates around a rod called an axle. The wheel and axle move together to move or lift loads.]]> 2017-11-12 01:04:18 UTC https://padlet.com/rosamercedes2004/w4vi1w3nxhny/wish/205933827 rosamercedes2004 https://padlet.com/rosamercedes2004/w4vi1w3nxhny/wish/206032369 The human body is complex machine that includes a number of simple machines—levers. Levers provide the body with the ability to accomplish tasks. A classic example of a third class lever is your forearm.]]> 2017-11-12 20:42:25 UTC https://padlet.com/rosamercedes2004/w4vi1w3nxhny/wish/206032369 rosamercedes2004 https://padlet.com/rosamercedes2004/w4vi1w3nxhny/wish/206042861 The fulcrum is at the top of the neck. The muscles in the neck provide an input force that allows you to raise your head.]]> 2017-11-12 22:05:18 UTC https://padlet.com/rosamercedes2004/w4vi1w3nxhny/wish/206042861 rosamercedes2004 https://padlet.com/rosamercedes2004/w4vi1w3nxhny/wish/207810414 Kinetic & potential energy video ]]> 2017-11-16 17:58:18 UTC https://padlet.com/rosamercedes2004/w4vi1w3nxhny/wish/207810414 rosamercedes2004 https://padlet.com/rosamercedes2004/w4vi1w3nxhny/wish/208118770 Green: chapter 7, blue: chapter 8, pink: chapter 9]]> 2017-11-17 14:34:23 UTC https://padlet.com/rosamercedes2004/w4vi1w3nxhny/wish/208118770