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Katie

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calculate the energy of a photon emitted when an electron in a hydrogen atom undergoes a transition from n=7 to n=1. Is it just
1. 2 answers
2. 1,889 views
A shotputter throws the shot with an initial speed of 15.6 m/s at a 38.0 angle to the horizontal.Calculate the horizontal
1. 0 answers
2. 1,084 views
A tiger leaps horizontally from a 5.8m -high rock with a speed of 3.6 m/s.How far from the base of the rock will she land?
1. 0 answers
2. 726 views
A diver running 2.4 m/s dives out horizontally from the edge of a vertical cliff and 2.6 s later reaches the water below. The
1. 1 answer
2. 1,396 views
A diver running 2.4 m/s dives out horizontally from the edge of a vertical cliff and 2.6 s later reaches the water below. How
1. 2 answers
2. 1,963 views
what is the mass of 1.22x10^23 molcules of carbon dioxide(co2) and silicon dioxide(Sio2)?
1. 1 answer
2. 1,138 views
what is the mass of 1 mole of carbon dioxide (CO2), and silicon dioxide (SIO2)?
1. 3 answers
2. 690 views
A ball is thrown upward from the ground with an initial speed of 26.2 m/s; at the same instant a ball is dropped from rest from
1. 1 answer
2. 713 views
_____ contain a fuel, rods to control nuclear reactions, and a cooling system.Would Nuclear reactor work??
1. 1 answer
2. 663 views
A certain protein was found to have 0.855% zinc by mass. Determine the minimum molecular mass of the protein.How do I go about
1. 2 answers
2. 5,611 views
A rock is dropped from a sea cliff, and the sound of it striking the ocean is heard 3.3 later. If the speed of sound is 340 ,
1. 4 answers
2. 4,943 views
Find the requested angle.The supplement of 135°.
1. 3 answers
2. 1,178 views
Glenda wants to glue glitter over a piece of felt shaped like a parallelogram with a height of 36 in. and a base of 46 in. If
1. 2 answers
2. 2,281 views
I had to write five sentences in which I used 5 different tenses. Here is what I wrote:Education helps financial planning by
1. 1 answer
2. 794 views
In the book Andromeda Strain, where is Vandenberg Air Force Base located?
1. 1 answer
2. 401 views
27 5/3 divided by 21 1/3The answer sheet said 81. How do you get this?
1. 1 answer
2. 411 views
Many analytical instruments require liquid nitrogen. While filling an instrument with liquid nitrogen, an analytical chemist
1. 1 answer
2. 1,188 views
A sample of air contains 78.08% nitrogen, 20.94% oxygen, 0.05% carbon dioxide, and 0.930% argon by volume. How many molecules of
1. 0 answers
2. 761 views
A sample of air contains 78.8% nitrogen, 20.94% oxygen, 0.05% carbon dioxide, and 0.930% argon by volume. How many molecules of
1. 4 answers
2. 1,685 views
Two cars, one in front of the other, are traveling down the highway at 25 m/s. The car behind sounds its horn, which has a
1. 0 answers
2. 868 views
The motion of a piston in an automobile engine is nearly simple harmonic. If the 1-kg piston travels back and forth over a total
1. 2 answers
2. 8,358 views
What angular speed (in revolutions/second) is needed for a centrifuge to produce an acceleration of 1000g at a radius arm of
1. 1 answer
2. 2,861 views
At what speed will a car round a 52-m-radius curve, banked at a 45 degree angle, if no friction is required between the road and
1. 1 answer
2. 2,005 views
A point on a rim of a 0.15-m-radius rotating disk has a centripetal acceleration of 5.0 m/s^2. What is the angular speed of a
1. 0 answers
2. 1,236 views
A 3.0-m rod is pivoted about its left end. A force of 6.0 N is applied perpendicular to the rod at a distance of 1.2m from the
1. 1 answer
2. 2,042 views
Differentiate:F(x)=e^(xsin2x) This isn't homework, it's review for our exam. Couldn't remember how to work it :( Thanks!
1. 2 answers
2. 473 views
At the end of April, ABC company had a balance of $37,910 in vacations benefits payable account. During May, employers earned an
1. 0 answers
2. 675 views
Why can’t you take a photograph of your image in a plane mirror and focus the camera on both your image and on the mirror
1. 1 answer
2. 577 views
Please Help!In our everyday environment, diffraction is much more evident for sound waves than for light waves. Why is this
1. 1 answer
2. 698 views
Write a 1,100- to 1,400-word paper in APA format comparing the entertainment fiction of the court system with its reality.·
1. 2 answers
2. 603 views
What are the definitions to principals of design in photography?
1. 1 answer
2. 423 views
Write a sentence that matches the form provided in the description(Sentence with compound subject and action verb.) My Sentence
1. 1 answer
2. 1,899 views
A beam of mass mb = 10.0 kg, is suspended from the ceiling by a single rope. It has a mass of m2 = 40.0 kg attached at one end
1. 1 answer
2. 1,053 views
A beam of mass mb = 10.0 kg, is suspended from the ceiling by a single rope. It has a mass of m2 = 40.0 kg attached at one end
1. 3 answers
2. 2,157 views
A share of common stock has just paid a dividend of $2.00. If the expected long-run growth rate for this stock is 7%, and if
1. 0 answers
2. 613 views
In 1938 Mexico nationalized America's oil, according to my textbook. What does this mean? I don't get what exactly they did.
1. 1 answer
2. 364 views
Aspirin (acetylsalicylic acid, ) is a weak monoprotic acid. To determine its acid-dissociation constant, a student dissolved
1. 2 answers
2. 1,842 views
classify each of the following as a lewis acid or base:Cl- BeCl2 B(CH3)3 P(Ch3)3 Cl- is an acid right? i'm not sure i understand
1. 2 answers
2. 1,836 views
Given the following equilibrium constants,Ka (NH4^+)=5.6*10^-10 Kb (NO2^-)=2.2*10^-11 Kw=1.00*10^-14 determine the equilibrium
1. 2 answers
2. 993 views
Calculate the ratio of NaF to HF required to create a buffer with pH=3.95.Also, can you please explain in a nutshell the whole
1. 6 answers
2. 5,707 views
Consider this reaction: CO (g) + H2O (g0 <---> CO2(g)+H2(g)kc=102 at 500 K A reaction mixture initially contains 0.145 M of CO
1. 1 answer
2. 1,238 views
Find the vertex of the parabola given by f(x) = x^2 - 3x + 4My answer was (3,13). Am I correct?
1. 1 answer
2. 309 views
Find th evertex of the parabola given by f(x) = x^2 - 3x + 4My answer was (3,13). Am I correct?
1. 2 answers
2. 326 views
Could you please find my mistake in this problem? I'm not getting the right answer. :[Use the reactions below to predict the
1. 2 answers
2. 664 views
Could you please find my mistake in this problem? I'm not getting the right answer. :[Use the reactions below to predict the
1. 1 answer
2. 533 views
Use the reactions below to predict the equilibrium constant for the reaction 2A(g)<->3D(g)A(s)<->1/2B(g)+C(g) k1=0.0334
1. 1 answer
2. 1,235 views
Evaluate whether a prepaid or monthly cell phone plan is most effective for a customer that uses x weekday minutes per month. I
1. 1 answer
2. 964 views
In Spain, all hotels are new and modern buildings? True or false.
1. 2 answers
2. 549 views
Find the exact value of:sin [2sin^-1 (-sq rt (3)/2)] how do i answer this question? i don't know how to find the answer.
1. 1 answer
2. 973 views
How do I solve the following?sec 3 theta/2 = 2 on the interval 0<theta<2 pi? I tried to look in my textbook but it doesn't have
1. 1 answer
2. 3,130 views
For a reversible reaction where A + B (both arrows) C + D, the equilibrium constant is represented by kc = 5.3 = (c)(d)/(A)[B].
1. 1 answer
2. 526 views
2H2 (g) + O2 (g) <---> 2H2O (g)what is the likely magnitude of the equilibrium constant? a) k < 10 ^-3 b) 10^-3<K<10^3 c)k=0
1. 2 answers
2. 1,805 views
Determine the [H3O+] of a 0.160M solution of benzoic acid.
1. 2 answers
2. 2,826 views
What is the pH of the following solutions?1)a solution that is 5.4×10−2 M in HClO4 and 3.0×10−2 M in HCl 2)a solution that
1. 4 answers
2. 1,284 views
Solve the system of linear equations by elimination. Thank You for your help.8x+10y=3 3x-5y=2
1. 2 answers
2. 1,292 views
how do i begin to solve this?integral of (1/x^2)sec(1/x)tan91/x)dx I tried substituting tan(1/x) for u but i couldn't get it to
1. 1 answer
2. 352 views
How do i begin to solve this?integralof dx/(cube root of 3x+4)
1. 3 answers
2. 406 views
Two blocks are connected by a light string passing over a pulley. The inclined surfaces are frictionless, and the effects of the
1. 0 answers
2. 789 views
If you can throw a ball vertically upward to a height h = 30.5 m, what is the maximum horizontal range over which you can throw
1. 0 answers
2. 1,159 views
A rock thrown horizontally from the top of a radio tower lands 20.0 m from the base of the tower. If the speed at which the
1. 1 answer
2. 988 views
A ball is thrown upward from a platform 4.6 m high with a speed of 23 m/s at an angle of 40 o from the horizontal. What is the
1. 1 answer
2. 464 views
Religions of common geographic origins tend to differ from others that originate in other areas of the world. How do religions
1. 3 answers
2. 720 views
State everything you know about the following atoms. Do NOT assume that they are balanced or neutral.Atomic number = 98 Mass
1. 3 answers
2. 578 views
You have a 50V battery in a circuit with a single resistor R. If the resistor dissipates 200 J of energy in 5 seconds, what is
1. 1 answer
2. 600 views
A playground is on the flat roof of a city school, 5.2 m above the street below (see figure). The vertical wall of the building
1. 3 answers
2. 804 views
The coordinates of an object moving in the xy plane vary with time according to the following equations x = −7.16 sin ùt and
1. 2 answers
2. 1,347 views
A playground is on the flat roof of a city school, 5.2 m above the street below (see figure). The vertical wall of the building
1. 2 answers
2. 980 views
A playground is on the flat roof of a city school, 5.2 m above the street below (see figure). The vertical wall of the building
1. 2 answers
2. 1,809 views
The solubility of sugar (surcose) in water is 4.0 g/mL at room temperature, what is the maximum amount of sugar that will
1. 2 answers
2. 665 views
The mass percent of a three component gas sample is 95.2% PF5, 1.40% C2H2 and 3.40% C3H6. Calculate the partial pressure (atm)
1. 2 answers
2. 515 views
I need to know I good way to do long division. The problem is: It takes 14 oranges to make a small pitcher of juice. Annette has
1. 6 answers
2. 370 views
What does this mean:Cantas en el coro?
1. 2 answers
2. 498 views
I have to analyze a statistical research paper and have never done so. How do I analyze statistical data and where do I find
1. 2 answers
2. 539 views
What word means to be the best in trade? None of my notes tell me this
1. 1 answer
2. 421 views
A square is inscribed in a circle of radius r. Express the length of the side of the square in terms of r.
1. 1 answer
2. 1,263 views
The function f is continuous on the closed interval [1,7] and has values in the table belowx f(x) 1 10 4 30 6 40 7 20 Usinf the
1. 1 answer
2. 3,204 views
Let F(x) be an antiderivative of sin^3(x). If F(1)=0 then F(8)=?The answer: 0.632 How do I get to that answer? Do I find the
1. 5 answers
2. 2,112 views
If the integral from a to b of f(x)dx=a+2b then integral from a to b of (f(x)+3)dx= ?The answer: 5b-2a How do I get to that
1. 2 answers
2. 5,135 views
If cosx=sqrt{3}/2 and −pi/2<=x<=0 then the exact value of x, in radians
1. 0 answers
2. 666 views
In what ways were the great civilizations of the New World similar to those of the Old World?
1. 0 answers
2. 993 views
How do you calculate the molar masses for Strontium Phosphate and Chromium(III)Nitride using significant figures correctly?
1. 1 answer
2. 1,108 views
Aerosol cans have a label that warns the user not to use them above a certain temperature and not to dispose of them by
1. 1 answer
2. 8,551 views
three dogs play tug-of-war with a chew toy. Each dog pulls with a force that is horizontal with the ground. Determine the net
1. 0 answers
2. 1,404 views
If an object is hung from a cable with a weight of 40 N, what is the tension in the two cables?I got some answers, but it would
1. 0 answers
2. 685 views
Is 3x-4=12 a linear equation? i know that 3x=16 but would that be considered linear? it would just be a vertical line correct?
1. 1 answer
2. 643 views
An airplane flies at an altitude of 5 miles toward a point directly over an observer. The speed of the plane is 600 mi/hr. Find
1. 0 answers
2. 1,036 views
An astronaut stands on the edge of a lunar crater and throws a half-eaten Twinkie™ horizontally with a velocity of 2.2 m/s.
1. 1 answer
2. 1,380 views
unscramble artiotinm
1. 4 answers
2. 861 views
Given f(x)=x^2, describe (in words) the transformation on f that would produce g(x)=-2(x+4)^2-7?
1. 0 answers
2. 387 views
Changes in the environment are monitored by (blank)satellites.
1. 1 answer
2. 444 views
We are doing problems with the product and quotient rules, but I'm not sure if I'm doing them correctly.If someone could check
1. 1 answer
2. 1,078 views
I am solving X^4-3x^2+2=0 I factored it to be (x^2-2)(x+1)(x-1) as my book suggested. But why is it three sets of parentheses?
1. 1 answer
2. 1,079 views
I have to figure out how x^3+216=0 is factored, and what potential solutions might be. I factored it like this:
1. 1 answer
2. 684 views
x^3-3x^2+3x-9=0. My book factors it to x^2(x-3)+3(x-3)=0, but then it magically becomes (x-3)(x^2+3). I have no idea how it
1. 1 answer
2. 314 views
4x^4-18x^2=0. I have to find out what x equals by factoring. What I did wasFactor 2x^2(2x^2+-9)=0 then 2x^2(2x+3)(x+-3),
1. 2 answers
2. 688 views
the term _________________ refers to rain, sleet, or snow that contain acidic compounds.
1. 1 answer
2. 497 views
Are there any tricks for remembering solubility rules? I am having a hard time remembering which compounds are soluble and which
1. 1 answer
2. 725 views
can you help me with this question?According to the clockmaker analogy did Voltaire believe that God was present in the world?
1. 1 answer
2. 1,039 views
Was plato's ideal form of government philsopher kings.
1. 1 answer
2. 427 views
Can you check my answer:Question: What were the key events that shaped Plato's beliefs? My answer: Plato was influenced by
1. 1 answer
2. 654 views

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