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  • Waiting for answer How do you write ##y= x^2-18x+52 into vertex form?

    Vertex Form is: ##y=(x-h)^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: ##y-52=x^2-18x## Now we find our perfect square: ##-18/2=-9; (-9)^2=81## ##y-52+81=x^2-18x+81## Now simplify to Vertex Form: ##...

  • 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...

  • Waiting for answer How can I solve radioactive half-life problems?

    There is a few main things to remember. 1) The radioactive half-life 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 half-lives can be expressed as n = total time / length of hal...

  • 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:...

  • Waiting for answer What is 0.5% written as a fraction?

    ##5/"1000"## or ##1/"200"## ##.5%##=##.5/"100"##=##.005##=##5/"1000"##=##1/"200"##

  • Waiting for answer Why is the Bronsted-Lowry definition of acids and bases mor...

    Well, let's put it this way: The Brønsted-Lowry definition, being less specific, is more encompassing than the Arrhenius definition. Here's what I mean. The Brønsted-Lowry definition says that: An acid donates a proton (##"H"^(+)##). No further qualification is involved. A base accepts a pr...

  • 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...

  • 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...

  • 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...

  • Waiting for answer What is the normal pulse rate for a women in each of the 1st...

    The normal heart rate of a woman is about 73 to 77 beats per minute (bpm). It increases to 86 to 90 bpm as the pregnancy progresses. First trimester Heart rate changes begin in th...

  • Waiting for answer How do you find the critical value of z alpha /2 that corres...

    Critical value is 1.51 The confidence interval is 87%. It is the same as 0.87. ##(.87/2)## = 0.435 Consult the Area Under Normal curve table. It is available in all the statisti...

  • Waiting for answer Who was the youngest president when taking office?

    John F. Kennedy President Roosevelt(who died at 63) was sworn into office only after the murder of William McKinley in 1901. This makes Kennedy(who died at 46) the youngest preside...

  • Waiting for answer What is the difference between a producer, secondary consume...

    A producer creates energy, primary consumers eat producers, secondary consumers then eat the primary consumers, and the tertiary consumers eat secondary consumers. Producers produce...

  • Waiting for answer What is the difference between electronegativity and electro...

    Well, they are talking about the same thing but here are the definitions. is a chemical property that says how well an atom can attract electrons towards itself. The electronegativity of an atom is influenced by the atom's and the distance between the atom's It was first theorised by Linus Paul...

  • Waiting for answer What is the circumference of the sun in millimeters?

    939887974000000 mm ##(939887974 km)((1000m)/(1km)) = 939887974000##cancel out the kilometer ##(939887974000m)((1000mm)/(1m)) = 939887974000000 mm##cancel out the meter PS: roughly a...

  • Waiting for answer A square box lid has an area of 40 square inches. What is th...

    About 6.3 inches To find the length of a side of a square, you need to find the square root of its area. Rounded to the nearest tenth, the square root of 40 is about ##6.3## inches.

  • Waiting for answer What is the difference between independent events and depend...

    Independent Events The probability of one event happening isn't influenced by the outcome of another. In mathematical terms ## A,B " events", P(AnnB)=P(A)*P(B)## This reads: Probability of A and B happening is equal to the probability of A happening multiplied by the probability of B happenin...

  • Waiting for answer No how many ribs dose a young girl have? Do you form more ri...

    Men and women have the same number of ribs - 12 pairs, or 24 all told. You neither lose nor gain ribs with age. Men and women have the same number of ribs - 12 pairs, or 24 all told....

  • Waiting for answer Which planet has the most moons?

    The planet with the most moons in our Solar System is Jupiter ; as of 2009, the planet has 63 confirmed moons. However, it is important to note that this number may change in the future as more moons are discovered. Saturn has 61 confirmed moons, so if more moons are found on Saturn it may become...

  • Waiting for answer How do ectothermic organisms regulate their body temperature...

    Ectotherms employ various behavioral physiological mechanisms to regulate their body temperatures. These mechanisms rely almost completely on the environment. Ectotherms have no internal heat regulation mechanism like endotherms. Thus, they are heavily reliant on external heat sources to maintai...

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