opnTens Location: Test: Question 1 of 40)ToolsThermal energy travels through space from the Sun to Venus. This is an example ofA. refractionB. radiationC. convectionD. conduction
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Related Questions
Which of the following statements does not describe a physical property of a piece of chalkA. Chalk is solidB.chalk can be broken into pieces C. Chalk is whiteD. Chalk will bubble in vinegar
What type of solid has the highest melting point? A. ionic solid B. network solidC. metal D. nonmetallic solid
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Which of the following energy changes occurs as a bow is drawn and released?1. gravitational potential to chemical potential 2. magnetic potential to kinetic3. elastic potential to kinetic 4. kinetic to thermal
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Final answer:
If an average cell phone is dropped from a typical cruising altitude of an airplane, neglecting air resistance, it would take about 107 seconds to reach the ground.
Explanation:
The subject this question falls under is physics because it involves the physical principles of gravity and free fall. If we ignore air resistance (a common simplification in basic physics problems), we can solve this problem by employing the equation for the time (t) of a free-falling object:
t = √(2h/g),
where h is the height the object falls from and g is acceleration due to gravity (about 9.8 m/).
Notice that we would need to first convert 37,000 feet to meters (about 11,277.6).
By substituting these values into our formula, we get a value that indicates that a phone falling from the typical cruising altitude of an airplane would take about 107 seconds to hit the ground.
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B. A physical change is a change from one state of matter to another; a chemical change results in a new substance formed.
C. A physical change produces a new element, and a chemical change results in a bond breaking between atoms.
D. A chemical change results in a new element being formed, and a physical change results in a new compound being formed.
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Answer:
- The correct answer is B.
A physical change is a change from one state of matter to another; a chemical change results in a new substance formed.
Physical properties:
Physical properties are those which have same composition. In other words, composition does not change, only state may be change like solid to liquid, liquid to gas, solid to liquid etc.
Example.
Water when freezes into ice, it is physical change, just state is change.
Chemical properties:
The chemical properties depend upon composition.
Example:
Formation of precipitates is an example of chemical change.
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Final answer:
The systematic name for the coordination compound [Cr(H2O)4Cl2]ClO3 is tetraaquadichlorochromium(III) chlorate.
Explanation:
The coordination compound you want to name falls under the subject of Chemistry, specifically inorganic Chemistry. The compound is [Cr(H2O)4Cl2]ClO3. The systematic name for this compounds is tetraaquadichlorochromium(III) chlorate. This nomenclature follows rules set out by Alfred Werner where the metal is specified (chromium), the number and type of ligands or ions the metal is bonded to are defined (tetraaqua, which indicates four water molecules, and dichloro for two chlorine ligands), and the oxidation state of the metal is given (III). Finally, the counter ion is named (chlorate).
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Hope this helped ^_^