Homework answers and tutorials

Waiting for answer How does the tilt of Earth's axis affect how the sun's rays...
See explanation. At any instant , facing hemisphere of the Earth has a zenith and a nadir. The latitude difference for these points is nearly ##180^o##. If there is no tilt, the...
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Waiting for answer What is the principle of superposition of waves?
of waves is what happens when two or more waves overlap. The result is wave . There are two types of interference: constructive and destructive. Constructive interference is when two crests or two troughs overlap. Destructive interference is when a crest is over a trough. In the diagram, th...
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Waiting for answer The mass of a proton is ##1.67*10^(27)## kg. What is the ma...
The mass of a proton in picograms is ##1.67 * 10^(12)"pg"##. This is a basic problem in which you must go from one order of magnitude, in your case kilograms, to another order of magnitude, picograms. As you can see, 1 kg contains ##10^(3)"g"##, and 1 g contains ##10^(12)"pg"## . In other wor...
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Waiting for answer The noble gas configuration for aluminum?
##[Ne]3s^(2)3p^(1)## Aluminium has 13 so the full will be: ##""_13Al## ##1s^(2)2s^(2)2p^(6)3s^(2)3p^(1)## A shorthand way of writing this is to use the preceding noble gas c...
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Waiting for answer How does one calculate ##K_M## and ##v_max## from the Linewe...
The equation for the LineweaverBurk plot is gotten by doing as the alternative name suggests... taking the reciprocal. GENERAL REACTION ##\mathbf(E + S stackrel(k_1)(rightleftharpoons) ES stackrel(k_2)( ) E + P)## ##color(white)(aaaaaa)^(\mathbf(k_(1)))## LINEWEAVERBURK PLOTS WITHOUT INHIBI...
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Waiting for answer What is the difference between a discrete random variable an...
A discrete random variable has a finite number of possible values. A continuous random variable could have any value (usually within a certain range). A discrete random variable is typically an integer although it may be a rational fraction. As an example of a discrete random variable: the value o...
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Waiting for answer If ##cos(50)=a##, then how do you express ##tan(130)## in te...
You can use some identities to make this easier. ##cos(50^o) = cos(50^o) = cos(130^o)## due to ##cos(x) = cos(x)## ##cos(x) = cos(x+pi)## Thus, you have: ##tan(130^o) = (sin(130^o))/(cos(130^o)) = (sin(130^o))/(cos(130^o))## Now, as for determining ##sin(130^o)##... Note that ##sin^2(13...
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Waiting for answer How do you simplify ##sqrt(5)sqrt(15)##?
You could also do either of the following: ##sqrt(5)sqrt(15) = sqrt(5)*sqrt(5*3)=sqrt(5)*sqrt(5)*sqrt(3)=sqrt(25)*sqrt(3)=5sqrt(3)## ##sqrt(5)sqrt(15) = sqrt(5)*sqrt(5)*sqrt(3)=sqrt(25)*sqrt(3)=5sqrt(3)##
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Waiting for answer What are the raw materials of photosynthesis?
They are water and carbon dioxide. These are two videos for the details of this process for both kids and adults
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Waiting for answer What is a fjord and how were they formed?
Scouring through glacial action. The action is probably repeating, over several cycles, given the length and depth of the structures.
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Waiting for answer How do you write ##y= x^218x+52 into vertex form?
Vertex Form is: ##y=(xh)^2+k## First, because the constant 52 doesn't help us immediately in finding a perfect square we can move it to the left with our ##y## term: ##y52=x^218x## Now we find our perfect square: ##18/2=9; (9)^2=81## ##y52+81=x^218x+81## Now simplify to Vertex Form: ##...
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Waiting for answer How can Newton's first law be derived from Newton's second l...
1st Law states that an object will continue without a change in motion (constant velocity) if there are no outside forces. 2nd Law states that to have an , there must be an outside force. ##sumF=m*a## If F = 0 ##sumF=m*a## becomes ##0=m*a## ##0=a## And if there is no acceleration, there is no...
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Waiting for answer How can I solve radioactive halflife problems?
There is a few main things to remember. 1) The radioactive halflife is the time taken for half the starting material to disappear. [Starting Amount] ##*## ##[1/2]^n## = Final Amount Where n is the number of half lives 2) The number of halflives can be expressed as n = total time / length of hal...
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Waiting for answer What is a buffer?
A buffer is a mixture of a weak acid, and its conjugate base in appreciable concentrations.......... ......It acts to moderate ##"gross"## changes in ##pH##. See this old answer:...
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Waiting for answer What is 0.5% written as a fraction?
##5/"1000"## or ##1/"200"## ##.5%##=##.5/"100"##=##.005##=##5/"1000"##=##1/"200"##
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Waiting for answer Why is the BronstedLowry definition of acids and bases mor...
Well, let's put it this way: The BrønstedLowry definition, being less specific, is more encompassing than the Arrhenius definition. Here's what I mean. The BrønstedLowry definition says that: An acid donates a proton (##"H"^(+)##). No further qualification is involved. A base accepts a pr...
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Waiting for answer At 25 °C, the molar solubility of silver phosphate is ##1.8...
##2.9xx10^(2) M## Let's start by writing the chemical reaction for the dissociation of silver phosphate: ##Ag_3PO_4(s) rightleftharpoons 3Ag^(+)(aq) +PO_4^(3)(aq)## Now, set the...
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Waiting for answer In the female reproductive system, what is the hymen?
Hymen is a membrane covering the outermost part of the vagina with some tiny holes allowing the monthly menstruating blood to come out. Types of hymen: It has no physiological role...
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Waiting for answer What is linear mass density?
Linear mass is the amount of mass per unit length. Just as ordinary density is mass per unit volume, linear density is mass per unit length. Linear densities are usually used for long thin objects such as strings for musical instruments. EXAMPLE Suppose we have a 0.80 mm diameter guitar string...
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