Mechanical advantage is the ratio of output force to input force. In this part of the task, you'll explore mechanical advantage using a simulation in which you use a ramp (inclined plane) to put a crate into the back of a truck. Open the inclined plane simulation. Keep all the default presets except for friction; set this to 0. To run the simulation, click on the crate and drag it up the ramp until the force arrow turns green, indicating that you're pulling with enough force to move the crate. Note that your actual mechanical advantage (Actual MA in the Outputs) is 2.24.

Reset the simulation, and return the friction to 0. How can you alter the ramp's length and height to increase its mechanical advantage? Does increasing the mechanical advantage make it harder or easier to push the crate up the ramp?

"record the time to complete a chemical reaction" would most likely be part of a lab procedure.

the enthalpy of formation of water is given as -285.8kj/mol, which states that the enthalpy of formation is negative.

negative enthalpy of formation indicates that the heat is released during the reaction process. the heat is released from reaction to the surroundings the enthalpy is expressed with a negative sign with the energy given out in the reaction process.

the formation of water takes place by giving out heat which is -285.8 kj/mol.

4d^55s^1 ( third choice)

on passing the small ampere of electric current through the tube made of ar and hg of cfl generates uv rays which excites the fluorescent and thus emits the high radiation by consumption of just 5- 12 w in comparison to incandescent light which requires more power such as around 40 - 55 w to lighten.

moreover the life span of fluorescent or cfl is around 8000 h whereas the life span of incandescent is around 1200 h

hence, the building installed with incandescent lights bears more electricity bill.