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Questions Asked on November 26, 2012

An X-ray photon of wavelength 0.954 nm strikes a surface. The emitted electron has a kinetic energy of 935 eV.What is the
1. 2 answers
2. asked by Amy
3. 13,064 views
The highest recorded waterfall in the world is found at Angel Falls in Venezuela. Its longest single waterfall has a height of
1. 3 answers
2. asked by PLEASE HELP
3. 6,315 views
Find the horizontal and vertical components of the vector with the given length and direction, and write the vector in terms of
1. 1 answer
2. asked by Ama
3. 4,756 views
The molar enthalpy of vaporization for wateris 40.79 kJ/mol. Express this enthalpy of vaporization in joules per gram. b. The
1. 2 answers
2. asked by maryam
3. 4,660 views
When a driver brakes an automobile, the friction between the brake drums and the brake shoes converts the car's kinetic energy
1. 1 answer
2. asked by please help
3. 4,617 views
Lake Erie contains roughly 4.00 1011 m3 of water.(a) How much energy is required to raise the temperature of that volume of
1. 1 answer
2. asked by PLEASE HELP(DUE SOON)
3. 4,361 views
37% of college students say they use credit cards because of the rewards program. You randomly select 10 college kids and ask
1. 2 answers
2. asked by Drew
3. 3,965 views
One mole of an ideal gas initially at a temperature of Ti = 7.4°C undergoes an expansion at a constant pressure of 1.00 atm to
1. 3 answers
2. asked by Sally
3. 3,356 views
An object moving with uniform acceleration has a velocity of 12m/s in the +ve x-direction,when its x-coordinate 3cm.if its
1. 4 answers
2. asked by Minte
3. 3,010 views
A gas is compressed at a constant pressure of 0.800 atm from 6.00 L to 1.00 L. In the process, 380 J of energy leaves the gas by
1. 3 answers
2. asked by Sam
3. 2,897 views
The block in the drawing has dimensions L0×2L0×3L0,where L0 =0.5 m. The block has a thermal conductivity of 150 J/(s·m·C˚).
1. 1 answer
2. asked by Anonymous
3. 2,758 views
A sample of oxygen occupies 1.00 L. If the temperature remains constant and the pressure on oxygen is decreased to one-third the
1. 2 answers
2. asked by Anonymous
3. 2,727 views
A rock is thrown straigh down from a height of 480 feet with an initial velocity of 16 feet per second. How long does it take to
1. 1 answer
2. asked by Jessica
3. 2,619 views
An investor has up to $450,000 to invest in two types of investment. Types A pays 6% annually and type B pays 10% annually. To
1. 1 answer
2. asked by Geen
3. 2,597 views
Zn^2+(aq) + 2OH^-(aq) ----> Zn(OH)2(s)a) how the addition of HCl affects the equilibrium? my answer is it will shift to the
1. 2 answers
2. asked by tracy
3. 2,577 views
A cart on an airtrack is moving at 0.5m/s.when the air is suddenly turned off the cart comes to rest after traveling 1m the
1. 2 answers
2. asked by Minte
3. 2,424 views
A 1500kg car is approaching the hill shown in the figure at 15.0 m/s when it suddenly runs out of gas.Part A What is the car's
1. 4 answers
2. asked by kelly
3. 2,418 views
What is the molality of a solution formed by dissolving 1.95 mol of KCl in 17.0 mol of water (MM of water = 18.02 g/mol), answer
1. 1 answer
2. asked by Jake
3. 2,405 views
what will happen to bromothymol blue indicator:a.) after addition of HCl, how does it affects the equilibrium b.) after addition
1. 2 answers
2. asked by kacey12
3. 2,355 views
On a centimeter dot array, draw all possible rectangles with a perimeter of 12 cm and sides whose lengths are whole centimeters.
1. 5 answers
2. asked by VauNea
3. 2,353 views
What electron transition in a hydrogen atom, ending in the orbit 4, will produce light of wavelength 2170 nm ?
1. 1 answer
2. asked by Chironjit
3. 2,187 views
A 95.1-g ice cube is initially at 0.0°C.(a) Find the change in entropy of the cube after it melts completely at 0.0°C. Hint:
1. 1 answer
2. asked by Sam
3. 2,169 views
find the absolute maximum and minimum for f(x) = x+ sin(x) on the closed interval [0, 2pi]
1. 1 answer
2. asked by chrissy
3. 2,164 views
44% of adults say cashews are their favorite kind of nut. You randomly select 12 people and ask each to name their favorite nut.
1. 2 answers
2. asked by Anon
3. 2,138 views
All eighth grade students can choose to take one of the following elective courses: art, chorus, band, or woodworking. There are
1. 4 answers
2. asked by Sara
3. 2,065 views
When you stand on your tiptoes, your feet pivot about your ankle. As shown in the figure, the forces on your foot are an upward
1. 3 answers
2. asked by Cassie
3. 2,042 views
Hypothesis: A prediction of what you think the results of the project will be. Write your hypothesis before you begin the
1. 1 answer
2. asked by Jessica
3. 1,960 views
An antitank weapon fires a 3.0 kg rocket which acquires a speed of 50. m/s after traveling 90. cm down a launching tube.
1. 1 answer
2. asked by Hussen
3. 1,920 views
A theater has 43 seats in the first row, 47 seats in the second, and 51 seats in the third row. How many seats are there in row
1. 1 answer
2. asked by CC
3. 1,882 views
Is the gerund being used as a subject, predicate nominative, direct object, or object of the preposition in the following
1. 9 answers
2. asked by Kelley
3. 1,754 views
The most common source of copper (Cu) is the mineral chalcopyrite (CuFeS2). How many kilograms of chalcopyrite must be mined to
1. 3 answers
2. asked by Renee
3. 1,732 views
A 9.6 kg dog takes a nap in a canoe and wakes up to find the canoe has drifted out onto the lake but now is stationary. He walks
1. 1 answer
2. asked by Anonymous
3. 1,685 views
I need someone to check my work not sure if I'm doing this right.The design of a digital box camera maximizes the volume while
1. 2 answers
2. asked by kevin
3. 1,672 views
in triangle PQR below, S and T are midpoints of side PQ and QR, repectively.If ST=12 and PR=2X+4, what is te value of X
1. 2 answers
2. asked by yenifer
3. 1,633 views
A right triangle has an area of 13 m2. The dimensions of the triangle are increased by a scale factor of 3. What is the area of
1. 5 answers
2. asked by Hager
3. 1,614 views
How did the people of Mohenjo-Daro modify their environment?
1. 4 answers
2. asked by Monica Ruiz
3. 1,609 views
A baseball whose mass is 0.25kg is struck by a bat. just before impact, the ball is traveling horizontally ay 40m/s to the left
1. 1 answer
2. asked by Rita
3. 1,568 views
Which consumes more energy, a 1.5 kW hair dryer used for 10 min or a 10 W night light left on for 19 hr?
1. 1 answer
2. asked by kev
3. 1,508 views
Transpose the prescription-0.75DS/-3.25DCx30 to the toric form with a capstan-form surface which has a +2.50D base curve
1. 4 answers
2. asked by please help
3. 1,491 views
If a supersaturated sugar solution is allowed to evaporate slowly, sugar crystals form in the container. Hence, sugar molecules
1. 1 answer
2. asked by S
3. 1,484 views
I NEED HELP!!The table shows the annual consumption of cheese people in the United States foor selected years in the nineteenth
1. 3 answers
2. asked by kevin
3. 1,449 views
nucleus of oxygen-15 undergoes electron capture. Write out the reaction equation and determine the identity of the daughter
1. 1 answer
2. asked by tiffany
3. 1,407 views
The standard free energy of activation of a reaction A is 88.6 kJ mol–1 (21.2 kcal mol–1) at 298 K. Reaction B is one
1. 1 answer
2. asked by Anonymous
3. 1,373 views
Two identical ice skaters are holding onto opposite ends of a very long spring with a spring constant of 650 N/m. While spinning
1. 0 answers
2. asked by Anonymous
3. 1,361 views
Joseph sold tickets to the school musical. He had 12 bills worth $175 for the ticketssold. If all the money was $5 bills, $10
1. 1 answer
2. asked by Jane
3. 1,359 views
A 66.0 kg rider sitting on a 7.1 kg bike is riding along at 9.4 m/s in the positive direction. The rider drags a foot on the
1. 1 answer
2. asked by Julia
3. 1,346 views
How many moles of CO2 would be expected to be produced from 0.00639 moles of sodium carbonate?
1. 2 answers
2. asked by John
3. 1,332 views
1. Fitzgerald creates purpose in Chapter 1. What was his purpose and how does he go about doing it?7. Write a Gatsby-esque
1. 1 answer
2. asked by Andrea
3. 1,290 views
The following electron configurations correspond to the ground states of certain elements. Name each element.a) [Ar]3d^10 4s^2
1. 1 answer
2. asked by Chironjit
3. 1,260 views
A spaceship of mass 2.3×10^6 kg is cruising at a speed of 6.0×10^6 m/s when the antimatter reactor fails, blowing the ship
1. 1 answer
2. asked by K
3. 1,259 views
A 24-g ice cube floats in 180 g of water in a 100-g copper cup; all are at a temperature of 0°C. A piece of lead at 92°C is
1. 2 answers
2. asked by Amanda
3. 1,229 views
What is a quartic function with only the two real zeroes given? x=-1 and x=-3Would someone please explain
1. 6 answers
2. asked by lee
3. 1,224 views
decide on a topic which is adding drinks to each purchase from the lunch for which they would like to collect data anddesign a
1. 1 answer
2. asked by Emily
3. 1,222 views
Scores on the LSAT are approximately normally distributed. In fact, published reports indicate that approximately 40 percent of
1. 2 answers
2. asked by MARY
3. 1,217 views
It is calculated that 0.0191 moles of CO2 are expected from a reaction at 25 degrees C and 1 atm. What volume of CO2 does this
1. 1 answer
2. asked by Jack
3. 1,217 views
The derivative of a function is f'(x)=x(x+2)(x-5). Find the value of x at each point where f has a(a) local maximum, (b) local
1. 2 answers
2. asked by Olivia
3. 1,205 views
Could you please show me how to work this problem?Each hand in the human body has 27 bones. There are 6 more bones in the
1. 3 answers
2. asked by Jane
3. 1,203 views
a 1100 kg wrecking ball hangs from a16m long cable. the ball is pulled back until the cable makes an angle of 17 with the
1. 2 answers
2. asked by kelly
3. 1,195 views
An Alaskan rescue plane traveling 36 m/s drops a package of emergency rations from a height of 162 m to a stranded party of
1. 1 answer
2. asked by Colby
3. 1,187 views
One-third cup of vanilla ice cream provides about 145kcal of energy. A typical adult uses about 195kcal/hr of energy while
1. 2 answers
2. asked by carol
3. 1,175 views
a population doubles every montha-initial population 20, what is function that represents poulation with respect to time b-how
1. 2 answers
2. asked by Steve
3. 1,163 views
a student heated 3.48 g of a pure sample of CaSO4 2 H2O until all the water of hydration was expelled. what was the mass of the
1. 1 answer
2. asked by Jules
3. 1,161 views
sal got into an elevator and went down 3 floors then went up 4 floors, then down 5 floors. he was then on the second floor. what
1. 3 answers
2. asked by Anonymous
3. 1,157 views
What is the pH of a 0.350M HBrO Solution? HBrO, Ka=2.3 x 10^-9
1. 1 answer
2. asked by May
3. 1,156 views
A coffee maker is rated at 1200 W, a toaster at 1100 W, and a waffle maker at1400 W. The three appliances are connected in
1. 1 answer
2. asked by Kenna
3. 1,141 views
If Peter picked 240% more plums than Roger and Peter picked 6800 how many did both pick altogether
1. 1 answer
2. asked by Danielle
3. 1,133 views
Sodium vapor lamps, use for public lighting, emits 489 nm yellow light. What energy is emitted by:a) an excited sodium atom when
1. 2 answers
2. asked by Michelle
3. 1,122 views
A spring of negligible mass stretches 2.20 cm from its relaxed length when a force of 10.50 N is applied. A 1.100 kg particle
1. 1 answer
2. asked by Anonymous
3. 1,122 views
calculate the Ph of the cathode compartment solution if the cell emf at 298 K is measured to be .6 V when Zn2+=.25M and PH2=0 .8
1. 0 answers
2. asked by BMW
3. 1,102 views
A model airplane of mass 1.5 kg is attachedto a horizontal string and ﬂies in a horizontal circle of radius 5.8 m, making 2
1. 1 answer
2. asked by James
3. 1,101 views
The following information was made available from the income statement and balance sheet of Lauren Company.Item 12/31/10
1. 0 answers
2. asked by Rescueme417
3. 1,100 views
SeleniumExpress your answer in condensed form, in order of increasing orbital energy. For example,[He]2s^22p^2.
1. 0 answers
2. asked by Chironjit
3. 1,097 views
How do you calculate the molarities of HC2H3O2 and NaC2H3O2 in a buffer solution?
1. 1 answer
2. asked by Marci
3. 1,091 views
Can you check my answers please?1.What does a circle with a star or dot in its middle usually mean on a map? What name would be
1. 2 answers
2. asked by Reed
3. 1,090 views
Linc, the 65kg lifeguard, slides down a water slide that is inclined at an angle of 35 degrees to the horizontal, into the
1. 1 answer
2. asked by Ben
3. 1,069 views
The derivative of a function is f'(x)=x(x+2)(x-5). Find the value of x at each point where f has a(a) local maximum, (b) local
1. 1 answer
2. asked by Olivia
3. 1,049 views
Assume that in Year 1, the ending merchandise inventory isoverstated by $30,000. If this is the only error in Years 1 and 2,
1. 1 answer
2. asked by Rescueme417
3. 1,047 views
A Carnot engine operates between 170°C and 23°C. How much ice can the engine melt from its exhaust after it has done 4.5 104 J
1. 2 answers
2. asked by Sam
3. 1,046 views
sketch the region enclosed by the given curves. Decide whether to integrate with respect to x or y. Draw a typical approximating
1. 1 answer
2. asked by luca
3. 1,037 views
The spring of the pressure gauge shown in the figure below has a force constant of 1,080 N/m, and the piston has a radius of
1. 1 answer
2. asked by dale
3. 1,036 views
Is the expression a monomial? explain.qs + 5
1. 1 answer
2. asked by brittany
3. 1,018 views
What is the pronoun in the sentence, He is called Spider?
1. 2 answers
2. asked by Anonymous
3. 1,016 views
A cart of mass 223 g is placed on a frictionless horizontal air track. A spring having a spring constant of 10.20 N/ m is
1. 1 answer
2. asked by Anonymous
3. 1,013 views
A 5.30-g lead bullet traveling at 390 m/s is stopped by a large tree. If half the kinetic energy of the bullet is transformed
1. 1 answer
2. asked by please help
3. 1,012 views
janes math scores were 96 percent 84 percent 92,and 87 percent.what is the average of her score
1. 1 answer
2. asked by Anonymous
3. 1,012 views
Two people push on a box that has a mass of 10kg, the person on the right has a mass of 86kg and applies a horizontal force of
1. 0 answers
2. asked by Tim
3. 1,008 views
Carnival mirrors make reflections look very odd. What makes the reflections in these mirrors so strange?
1. 2 answers
2. asked by stephanie
3. 1,003 views
A wheel-and-axle system shown consists of two coaxial wheels of radius r = 2 meters and R = 6 meters. The forces applied to the
1. 0 answers
2. asked by Anonymous
3. 1,002 views
please help me i am in 4th grade and i need help on my science project. my science project is, is smiling contagious and i have
1. 1 answer
2. asked by kaylee
3. 1,001 views
Visible light is incident perpendicularly on a diffraction grating of 200 rulings/mm. What are the (a) longest, (b) second
1. 1 answer
2. asked by Brian
3. 996 views
You are planning an ornamental garden that has a total area of 200 square feet. There are two sizes of ornamental plants you
1. 1 answer
2. asked by eve
3. 994 views
A homeowner is trying to move a stubborn rock from his yard which has a mass of 1025 kg. By using a lever arm (a piece of wooden
1. 3 answers
2. asked by Mike
3. 989 views
Develop psuedocode to control operation of vending machineThe ACME Company has approached you with a request to develop the
1. 0 answers
2. asked by Chris
3. 983 views
What would be a good quote to describe me encouraging someone to become a better singer? How about giving advice and preventing
1. 1 answer
2. asked by Emma
3. 980 views
what is the right way to cite this? all the info comes from 1 book but different pages.Martin Kantor (2003). Distancing:
1. 5 answers
2. asked by john
3. 974 views
Two blocks, (Mass of block 1 = 2.3kg, Mass of block 2 = 1.2kg), are in contact on a frictionless table. If a horizontal force of
1. 0 answers
2. asked by Tim
3. 974 views
Two 0.61 kg basketballs, each with a radius of 13 cm, are just touching. How much energy is required to change the separation
1. 1 answer
2. asked by chris neives
3. 960 views
Under the rules of the United States Golf Association the volume of a golf ball cannot be less than 2.48 cubic inches.A.
1. 1 answer
2. asked by Ely
3. 956 views
the molecular weight of the protein is about 45 kilodaltons, and the molecular weight of glucose is about 180 daltons. jHow can
1. 1 answer
2. asked by bio123
3. 950 views
A 9.6 kg dog takes a nap in a canoe and wakes up to find the canoe has drifted out onto the lake but now is stationary. He walks
1. 0 answers
2. asked by K
3. 939 views

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