The heart is protected from the bones by the .

Answers

Answer 1

Answer: The heart is protected from the bones by the rib cage or the thoracic cage. It protects both the heart and the lungs. The rib cage is composed of 12 pair of ribs, the sternum and thoracic vertebrae. All ribs are connected to the thoracic vertebrae. The rib cage also do not only protect the heart and lungs but also support the body and aid in respiratory function.

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With a 1.0–2.0 Sv dosage of radiation, an individual can expect to A. die. B. hemorrhage. C. see no immediate effect. D. have nausea and hair loss.
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Drawing a conclusion derived from knowledge of an established principle is called deductive reasoning.True or false?

Answers

Answer: TRUE

Explanation:

Deductive reasoning is a process in which a conclusion is drawn on the basis of similarities and concordance with pre- proposed principles and multiple premises which are expected and assumed to be true.

In simple words the deductive reasoning is based upon conclusion which is derived from one or more statements or principles which are expected to be true.

On the basis of the above explanation, the statement Drawing a conclusion derived from knowledge of an established principle is called deductive reasoning. is true.

That would be correct.

Examine the graph below.Choose which of the following is NOT true.

Absolute zero on Kelvin scale is -273°C.
Liquefaction of the gas occurs at approximately -155°C.
Condensation occurs at 0°C.
The gas follows a linear relationship between volume and temperature.

Answers

Answer : The incorrect option is, Condensation occurs at $0^oC$ .

Explanation :

Absolute zero on Kelvin scale is $-273^oC$ .

This statement is correct because at $0K$ the temperature in degree Celsius will be, $0K=0-273=-273^oC$

Liquefaction of the gas occurs at approximately $-155^oC$ .

This statement is correct. From the given graph the liquification of gas occurs at $-155^oC$ .

The gas follows a linear relationship between volume and temperature.

This statement is correct. According to the Charles law, the volume of gas is directly proportional to the temperature of the gas. So, gas follow the linear relationship between the volume and temperature.

Condensation occurs at $0^oC$ .

This statement is incorrect because condensation occurs at $100^oC$ . and the condensation is a process in which the phase changes from the gaseous state to liquid state at constant temperature.

As we know that condensation is a reverse process of vaporization. Both the process occurs at constant temperature $100^oC$ .

Hence, the incorrect option is, Condensation occurs at $0^oC$ .

Obviously from the graph, the relationship is linear. Charle's laws also say that so that one can be eliminated. Also using the points on the graph, abolute 0 is -273 and liquefication occurs around -155. That sets the answer to Condensation occurs at 0

Which yields H+(aq) as the only positive ion in an aqueous solution?(1) CH3CHO (2) CH3CH2OH (3) CH3COOH (4) CH3OCH3

Answers

If H+ would have to dissociate from a substance and must be the only positive ion in the solution that substance must be an acid.
CH3CHO is an aldehyde called acetaldehyde.
CH3CH2OH is an alcohol called ethanol
CH3OCH3 is an ether called dimethyl ether.
and finally, the answer CH3COOH is a weak acid called acetic acid.

Answer:The correct answer is option (3).

Explanation:

Carboxylic acid gives $H^+$ ions in their aqueous solution.

$RCOOH\rightleftharpoons RCOO^-+H^+$

$CH_3COOH\rightleftharpoons CH_3COO^-+H^+$

Carbonate ion formed is stabilized due to resonance.

Whereas aldehyde in their aqueous solution do not give $H^+$ ions.

Alcohol in their aqueous solution do not give $H^+$ ions.

Ether in their aqueous solution do not give $H^+$ ions.

Which physical method can separate a mixture of steel ball bearings and marbles ?a. boiling
b. evaporation
c. filtration
d.sorting

Answers

SORTING METHOD can easily be used to separate a mixture of steel ball bearing and marbles. This separation method is suitable because the two substances that are mixed together have big sizes, so it is easy to separate the two by hand picking the particles. Sorting method is usually used as a separation technique when the size of the mixture is big and the mixed substances are in the same state.

Answer:

D. Sorting

Explanation:

Just tested

Ionic crystals are extremely malleable because they contain a positively charged metal ion,TRUE

FALSE

Answers

The statement “Ionic crystals are extremely malleable because they contain a positively charged metal ion” is false. Ionic crystals are composed of positive and negative ions that are combined so that the numbers of positive and negative charges are equal.

We can also use the activity series to predict reactions between a metal and an acid. what are the products of the reaction fe(s) + h2so4(aq)?

Answers

Answer;

FeSO4 (aq) + H2 (g)

Explanation;

The reaction between iron and dilute sulfuric acid gives a salt and hydrogen gas. (iron (ii) sulfate and hydrogen gas).

The equation for the reaction is;

Fe(s) + H2SO4 (aq) = FeSO4(aq) +H2(g)

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Which of the following is not capable of reacting with molecular oxygen?A. SO₂ B. SO₃ C. NO D. N₂O E. P₄O₆

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Write the empirical formula for at least four ionic compounds ca2+.v5+,f-,s2

What type of radiation is emitted when polonium-212 forms lead-208?a. an alpha particleb. a beta particlec. gamma radiationd. all of the above