Homework answers and tutorials

Waiting for answer How do you find the 6 trigonometric functions for 150 degree...
Refer to explanation We have that ##sin(150)=sin(18030)=sin30=1/2## ##csc(150)=1/sin(150)=2## ##cos (150) = –cos(30) =sqrt3/2 ## ##sec(150) = 1/cos(150)=2/sqrt3## ##tan(150)=...
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Waiting for answer What is 60 in scientific notation ?
It is ##6 *10^1## The number expressed in scientific notation must have the same number of significant figures as the starting number has. In this case, ##60## has one significant...
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Waiting for answer How do you solve ##tan^2x  1 = 0##?
##x=pi/4+(kpi)/2##, where ##k## is any integer Factor using the difference of squares technique. ##a^2b^2=(a+b)(ab)## Thus, ##tan^2x1=(tanx+1)(tanx1)## Now, substitute th...
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Waiting for answer Why is there more than one definition of acid–base behavior?
There is more than one definition because our knowledge of acids and bases increased as the years went by. In 1777, the French chemist Lavoisier first proposed that acids contained oxygen. He was wrong. He didn't know about hydrochloric acid (HCl). By 1877, the Swedish chemist Svante Arrhenius...
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Waiting for answer How can I find the percent compositions of N2S2?
To find the of N₂S₂, you divide the total mass of each atom by the molecular mass and multiply by 100 %. % by mass = ##"mass of component"/"total mass"## × 100 % Mass of 2 N atoms = 2 N atoms × ##(14.01"u")/(1"N atom")## = 28.02 u. Mass of 2 S atoms = 2 S atoms × ##(32.06"u")/(1"S atom")## = 64....
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Waiting for answer How does Newton's third law relate to an egg drop?
Newton's third law, which states that every action has an equal and opposite reaction, can be related to an egg drop because the forces pushing the egg up and down must follow the law....
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Waiting for answer A Nitrogen atom with 7 protons and 8 neutrons has a mass num...
Because there exist nuclei with with 7 protons and MORE OR LESS than 7 neutrons; that is nitrogen possesses a number of . If a nucleus possesses 7 protons, 7 fundamental positive par...
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Waiting for answer What is the cell membrane made up of?
The is made of hydrophobic and hydrophobic. In the mosaic cell membrane is made of hydrophilic (water substance) and hydrophobic (lipid substance) which forms the phospholipid bil...
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Waiting for answer What is the inverse cosine of 0.55?
##"cos"^(1)(0.55)"=56.632987"^"o"## The inverse cosine for a number is represented as ##"cos"^(1)x##. It allows you to determine the angle. So the inverse cosine of ##0.55## is ##"...
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Waiting for answer What is the difference between accuracy and precision?
The difference is: Accuracy: The closeness of an experimental result to the true value, i.e you determine the concentration of something using a method to see if you get the same c...
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Waiting for answer How do you solve ##(1/1000)^(1/3)##?
##10## ##(1/1000)^(1/3)## =##(1000)^(1/3) ## get the reciprocal of the base to make the exponent positive. =##root(3)(1000) ## change to radical form. =##10 ## simplify.
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Waiting for answer What is genotype expression ?
If a genotype is expressed, the combination of that genotype and the environment are what make an individual's phenotype. The is the combination of alleles (gene forms) and the i...
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Waiting for answer What is the the tangent of 4pi/3 using the unit circle?
##sqrt3## Using unit circle and trig table of special arcs  ##tan ((4pi)/3) = tan (pi/3 + pi) = tan (pi/3) = sqrt3##
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Waiting for answer Why is price elasticity of demand always negative?
Price of demand(PED) is always negative because price of commodity and demand for that commodity has inverse relationship. We know, ## PED = " %change in quantity"/" % change in pr...
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Waiting for answer Why do primary alkyl halides generally undergo SN2 mechanism...
Primary alkyl halides generally undergo ##"S"_N2## mechanisms because (a) 1° substrates have little steric hindrance to nucleophilic attack and (b) 1° carbocations are relatively unstable. Steric Hindrance As more alkyl groups are added to the α carbon atom, the substrate becomes less susceptible...
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Waiting for answer What is the difference between the Pythagorean Theorem and P...
The first one is a Theorem while the latter is a set of three numbers (i.e. a triple) satisfying the Pythagorean relation. Specifically, the states that the square of the hypotenuse...
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Waiting for answer How do you express ##x^(4/3)## in simplest radical form?
You raise ##x## to the ##4^"th"## power, then take the cube root . When dealing with , it's always useful to remember that the exponent can be written as a product of an integer and...
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Waiting for answer What is the standard enthalpy of the reaction CO+H2O >...
The standard of reaction is +2.85 kJ. We can use the standard enthalpies of formation of the reactants and products to calculate the standard enthalpy of reaction. I list their va...
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Waiting for answer What is the difference between divisor, dividend, nominator,...
See answer. The dividend is what's getting divided, and the divisor is what's doing the dividing. For example, in ##8div2##, ##8## is the dividend, and ##2## is the divisor. The nu...
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Waiting for answer Why are tundra plants usually small?
Short season for growing and cold temperatures. Tundra biomes are either found at high latitudes or high elevations in mountains. These are both very cold environments that are domi...
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