Which option defines kinetic energy? (1 point) the average energy released when a liquid becomes a solid

the average energy of particles due to motion

the energy an object has because of its motion

Which option describes temperature? (1 point)
the measure of the average kinetic energy of particles in an object due to motion
the measure of the energy a solid possesses due to its motion
the measure of the average kinetic energy of particles in gases and liquids
the measure of the energy an object possesses due to its motion

Use the table to answer the question.
Substance Melting Point (°C) Boiling Point (°C)
silicon
helium
mercury
methane
Which substance shown has the greatest kinetic energy at room temperature (~25°C)?
(1 point)
1, 410 2, 355
−272.2 −268.9
−38.8 356.6
−182.4 −161.5
mercury
helium
methane
silicon

the energy required to change a gas into a liquid

Agas diffuses 1/7 times faster than hydrogen gas (h2). what is the molar mass of the gas? 100.10 g/mol 98.78 g/mol 86.68 g/mol 79.98 g/mol

Which element has the lowest electronegativity? calcium(ca) gallium(ga) selenium(se) bromine(br)

98 points you will be galileo perform the experiment to determine if objects with different mass fall at the same, or different, rates in the air and in a vacuum. before you conduct your experiment, you need to form a hypothesis. a hypothesis is a prediction of what you think will happen in the experiment. the hypothesis is a statement that describes “if” a certain set of circumstances are present “then” there will be a specific result that will occur. record your hypothesis here: record the results from step one of the experiment (dropping the objects in the air): first trial: second trial: third trial: record the results from step two of the experiment (dropping the objects in a vacuum): first trial: second trial: third trial: did the experiment support your hypothesis? using the data from your experiment, describe why you believe your hypothesis was either proven or disproven. what forces were acting on the objects dropped in the air? what force was acting on the objects dropped in the vacuum? part two: comparing forces choose two forces and compare and contrast these forces. you must provide two ways that they are alike and two ways that they are different. you may make a list, write in paragraph form, or make a chart. choose two forces and compare and contrast these forces. these must be different forces than used in the prior question. provide two ways that they are similar and two ways that they are different. you may make a list, write it out, or make a chart.