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A uniform disk with a mass of 130 kg and a radius of 1.2 m rotates initially with an angular speed of 950 rev/min. A constant
1. 2 answers
2. 653 views
A 1.2 m diameter wagon wheel consists of a thin rim having a mass of 11 kg and six spokes, each with a mass of 1.1 kg. Find the
1. 1 answer
2. 2,551 views
A ball bounces to 45 percent of its original height.What fraction of its mechanical energy is lost each time it bounces? What is
1. 0 answers
2. 660 views
A ball bounces to 45 percent of its original height.What fraction of its mechanical energy is lost each time it bounces? What is
1. 2 answers
2. 1,288 views
A small car of mass 985 kg is parked behind a small truck of mass 1551 kg on a level road. The brakes of both the car and the
1. 1 answer
2. 2,327 views
A 1.3 kg steel ball and 8 m cord of negligi-ble mass make up a simple pendulum that can pivot without friction about the point
1. 2 answers
2. 1,206 views
When a 0.35 kg baseball is hit, its velocitychanges from 21 m/s to -29.5 m/s. What is the magnitude of the impulse de-livered by
1. 3 answers
2. 515 views
for the transition of an electron in a hydrogen atom between the principal quantum number levels 4 and 3, calculatea) the energy
1. 3 answers
2. 484 views
A 6 kg block moves at 5 m/s to the right while a 9.5 kg block moves at 8 m/s to the right. Find the total kinetic energy of the
1. 1 answer
2. 367 views
Three balls with masses of 4 g, 6 g, and 4 g,respectively, are connected by massless rods. The balls are located (in meter
1. 1 answer
2. 707 views
if you had two ping pong balls (or golf balls, or tennis balls), both carrying the maximumpossible positive electrical charge,
1. 0 answers
2. 547 views
95.65 grams of barium hydroxide were dissolved in 2000ml of water. 88 grams of carbon dioxide were passed through the solution
1. 2 answers
2. 497 views
A man of mass 83.5 kg walks down the aisle of an airplane at a speed of 1.60 m/s in the forward direction while the plane moves
1. 0 answers
2. 430 views
a 1.0 N-weight is hanging at rest as shown. In each case, write in the magnitude of the unknown force.a) chain with a weight of
1. 3 answers
2. 3,097 views
What minimum speed does a 100 g puck need to make it to the top of a 5.9 m-long, 29 degree frictionless ramp?
1. 1 answer
2. 872 views
Pendulum A is 20 cm long and has a 5 g mass on it. Pendulum B is 30 cm long and has a 10 g mass on it. Which one has a faster
1. 1 answer
2. 1,374 views
When 3.2 moles of Al react with excess HNO3 at STP, How many liters of H2 are formed
1. 1 answer
2. 456 views
HOw much Nacl (MW= 58.44g) would you need to to a solution if you wanted to make 100 ,mL of 4* 10 to the -3 M NaCl?
1. 0 answers
2. 612 views
An electron at rest is found to have a force of 0.40 N to the left. What is the electric field (magnitude and direction) at the
1. 2 answers
2. 377 views
Explain relationships between two or more seemingly unrelated things.
1. 2 answers
2. 419 views
If The cat is a little more than 1 foot tall what is a good estimate for the length of computer screen?
1. 1 answer
2. 380 views
to produce 4.00 mole if c6h12 from the following how many grams of c6h6 must you combine78.12 g/mol c6h6 + 2.02 g/mol h2 = 84.18
1. 1 answer
2. 1,578 views
Assume you have a computer that contains 2GB of memory. It contains four memory slots. Each slot can contain 128 MB, 256 MB,
1. 3 answers
2. 959 views
A passenger in the rear seat of a car moving at a steady speed is at rest relative tothe side of the road. a pedestrian on the
1. 1 answer
2. 879 views
a water wave has frequency 0.40 Hz and wavelength 2.0m. Its speed is
1. 1 answer
2. 884 views
a water wave has frequency 0.40 Hz and wavelength 2.0m. Its speed is
1. 1 answer
2. 569 views
a water wave has frequency 0.40 Hz and wavelength 2.0m. Its speed is
1. 1 answer
2. 1,063 views
Why Do You Think It Was Hard For Spain To Maintain It's Empire ? Explain.
1. 1 answer
2. 1,155 views
Do You Think It Was Right Or Wrong For The United States To Declare War On Spain ? Explain.
1. 1 answer
2. 393 views
what mass of KCl in grams is formed with 20 lbs of KClO3 is decomposedKCl03 yields KCl + O2
1. 1 answer
2. 631 views
When 30.0 grams of aluminum reacts with HCl how many grams of aluminum chloride are formed? Al = HCl yields AlCl3 + H 2
1. 1 answer
2. 1,146 views
calculate the mass in grams of carbon needed to produce 160 grams of CO2 burning. C + O2 -> CO2
1. 2 answers
2. 1,433 views
What force would be needed to accelerate a 0.040-kg golf ball at 20.0 m/s^2??
1. 2 answers
2. 1,566 views
A baseball player throws a ball. While the 700.0-g ball is in the pitchers hand, there os a force of 125N in it. What is the
1. 4 answers
2. 1,244 views
Why Do You Think It Was Hard For Spain To Maintain It's Empire ?
1. 1 answer
2. 413 views
I have to do an essay and i have trouble answering some of the questions.Thnaks!I need help with the second question.(its
1. 0 answers
2. 432 views
A rock contains 200. µmol 238U (t1/2 = 4.5 109 yr) and 116 µmol 206Pb. Assuming that all the 206Pb comes from decay of the
1. 1 answer
2. 1,531 views
what is a Ninus’ Tomb & Metaphor?
1. 1 answer
2. 467 views
Can i show you a thing i need help with...
1. 5 answers
2. 788 views
Olive-Oil producers have expanded to approximately 120 producers statewide. Analysts estimate the average price consumers pay
1. 0 answers
2. 464 views
A satellite made of aluminum with mass 3500 kg travels on circulated path in 100 km height over the earth. Because of
1. 1 answer
2. 826 views
A cylinder shaped buoy is stationary out on a lake. The height of the buoy is 1 m and the diameter is 30 cm and it‘s mass is
1. 0 answers
2. 642 views
A weight with mass m lies on a surface with no friction. The weight is also connected to a spring with springconstant k and then
1. 1 answer
2. 440 views
(a) A person drinks four glasses of cold water (3.0°C) every day. The volume of each glass is 2.5x10^2 mL. How much heat (in
1. 3 answers
2. 2,110 views
A beam has a mass M and length L. A point mass m is located in distance d from the end of the beam and the point mass and the
1. 0 answers
2. 405 views
What is outsourcing ?
1. 1 answer
2. 456 views
Before the first white person set foot in North America, it's people can be described most accurately asA) nomadic B) democratic
1. 5 answers
2. 630 views
Marie Curie first identified the element radium in 1898. She found that the radium-226 (mass 3.77x10^-25 kg) decays by emitting
1. 2 answers
2. 635 views
Chemical analysis show that hemoglobin contains 0.34 percent Fe by mass. What is the minimum possible molar mass of hemoglobin?
1. 1 answer
2. 2,252 views
Benzene and cyclohexane molecules both contain six-membered rings. Benzene is a planar molecule, and cyclohexane is nonplanar.
1. 1 answer
2. 843 views
Use the data in Table 15.3 (in the book Chemistry after Raymond Chang) to calculate the equilibrium constant for the following
1. 1 answer
2. 573 views
Factor and simplify the expression.1-sin^3 x
1. 1 answer
2. 931 views
Find tanx if sinx = 3/4 and x is in quadrant II.
1. 1 answer
2. 660 views
7. Give and interpret the 95% confidence interval for the hours of sleep a student gets.
1. 2 answers
2. 540 views
An oxalic acid solution contains the following species in varying concentrations: H2C2O4, HC2O4-, C2O4^2-, and H+. Which of the
1. 1 answer
2. 2,455 views
The equilibrium constant for the reaction below is Kc = 9.1 10-6 at 298 K.2 Fe3+(aq) + Hg22+(aq) 2 Fe2+(aq) + 2 Hg2+(aq)
1. 1 answer
2. 1,036 views
1998 scientists using a special type of electron microscope were able to measure the force needed to break a single chemical
1. 0 answers
2. 884 views
Most organic acids can be represented as RCOOH, where COOH is the carboxyl group and R is the rest of the molecule. (For
1. 1 answer
2. 967 views
a rectangle has an area of (2x^2 +12), a length of 9x+1) and a width of (3x-6). what is the value of x?
1. 1 answer
2. 396 views
If the formula R = -0.037t + 50.1 can be used to predict the world record in the 400 meter dash t years after 1925, for what
1. 1 answer
2. 557 views
A student breaks a thermometer and spills most of the mercury (Hg) onto the floor of a laboratory that measures 15.2 m long, 6.6
1. 1 answer
2. 736 views
If 10.00 g of water are introduced into an evacuated flask of volume 2.500 L at 65 degreed celcius, calculate the mass of water
1. 0 answers
2. 704 views
If 10.00 g of water are introduced into an evacuated flask of volume 2.500 L at 65 degreed celcius, calculate the mass of water
1. 2 answers
2. 1,479 views
Which of the following aqueous solutions would you expect to be the best conductor of electricity at 25 degrees celcius? Explain
1. 3 answers
2. 4,110 views
An Earth satellite moves in a circular orbit 770 km above the Earth's surface. The period of the motion is 100.0 min. What is
1. 1 answer
2. 818 views
A stone is projected at a cliff of height h with an initial speed of 48.0 m/s directed 60.0° above the horizontal. The stone
1. 1 answer
2. 1,526 views
the basis of oxidation number considerations, one of the following oxides would not react with molecular oxygen: NO, N2O, SO2,
1. 2 answers
2. 3,456 views
A compound made up of C, H, and Cl contains 55,0 percent Cl by mass. If 9,00 g of the compound contain 4,19 x 10^23 H atoms,
1. 3 answers
2. 2,773 views
Find the intercepts of the graph of x^2 + y^2 + 4xy - 2x + 7y = 8
1. 1 answer
2. 478 views
We should either visit the art museum or attend a concert this weekend.Is this a parallel sentence?
1. 3 answers
2. 578 views
how do you solve 2b+9=3
1. 1 answer
2. 281 views
give expressions in the variable n, n ≥ 3 for the number of sugar cubes in the n*n*n cube with 0,1,2, or 3 painted faces,
1. 1 answer
2. 343 views
Is sea water close to being a saturated sodium chloride solution?
1. 1 answer
2. 1,230 views
what is the journal entry if a owner of a company deposited $15,000 in their checking account. In return they received 1000
1. 0 answers
2. 452 views
A rigid vessel of 1m^3 contains steam at 20 bar and 400 degree C. the vessel is cooled until the steam is just dry saturated.
1. 0 answers
2. 941 views
The perimeter of a square is equal to its area plus four. What is the measure of one side of the square?
1. 1 answer
2. 413 views
Solve1. 3x^2-9x=0 2. 12x^2+30x=-12 3. 9a(a+1)=4 4. 16x^2=25
1. 1 answer
2. 815 views
I want to make it clear that I do not want any answers to the project I am about to post on here. I only need help understanding
1. 3 answers
2. 825 views
Elena bicycles 4 km/h faster than Robert. In the same time it takes Robert to bicycle 27km/h, Elena can bicycle 39 km. How fast
1. 1 answer
2. 741 views
Use the standard reaction enthalpies given below to determine ΔH°rxn for the following reaction:2 NO(g) + O2(g) → 2 NO2(g),
1. 3 answers
2. 23,974 views
According to the following thermochemical equation, what mass of H2O (in g) must form in order to produce 975 kJ of energy?SiO2(
1. 4 answers
2. 7,186 views
A 4.98 g sample of aniline (C6H5NH2, molar mass = 93.13 g/mol) was combusted in a bomb calorimeter with a heat capacity of 4.25
1. 10 answers
2. 4,303 views
I need help writing a paragraph using these words. Retrospect, Inane, Squelch, Subsidize, and Lethargy.
1. 1 answer
2. 512 views
Given the equilibrium: CO + 2H2 = CH3OHH=-18.0kJ How will the concentration of CO at equilibrium be affected by the following?
1. 1 answer
2. 1,187 views
Why doesn't stirring not affect solution equilibrium??
1. 1 answer
2. 360 views
Balance the following redox equation by the oxidation number methodeAg + HNO3 = AgNO3 + NO + H2O I have all the oxidation
1. 2 answers
2. 2,600 views
Balance the following redox equation by the oxidation number methodeAg + HNO3 = AgNO3 + NO + H2O
1. 3 answers
2. 637 views
How many grams of potassium permanganate(KMnO4) should be added to a 100 mL volumetric flask to prepare a 0.02505 M solution
1. 0 answers
2. 580 views
As online attacks persist, spending on information security software continues to rise. The table gives the forecast for the
1. 2 answers
2. 801 views
Kane Manufacturing has a division that produces two models of hibachis, model A and model B. To produce each model-A hibachi
1. 2 answers
2. 3,916 views
The price of a new car is $16,000. Assume that an individual makes a down payment of 25% toward the purchase of the car and
1. 6 answers
2. 5,148 views
Carlos invested $6,000 in a money market mutual fund that pays interest on a daily basis. The balance in his account at the end
1. 2 answers
2. 1,013 views
What would you say this line ment:I am the chosen no hand saves?
1. 5 answers
2. 401 views
At which temperature will the following reactions reverse? Use the thermodynamic date provided at the end of the book.a) 2Ca(s)
1. 1 answer
2. 350 views
Is it possible to produce a form of sodium ferrate using these components?FeCl3 NaOH NaOCl
1. 0 answers
2. 327 views
Postal regulations specify that a package sent by priority mail may have a combined length and girth of no more than 129 in.
1. 0 answers
2. 788 views
At a particular temperature, K = 3.75 for the following reaction.SO2(g) + NO2(g) <==> SO3(g) + NO(g)\ If all four gases had
1. 1 answer
2. 848 views
A sled of mass 5.98 kg is coasting along on a frictionless ice-covered lake at a constant speed of 1.42 m/s. A 1.98-kg book is
1. 0 answers
2. 576 views
How do I solve this?4/3PI*R^3 When R=6 I get 288 if I do it in PI form. Just seems really high.
1. 1 answer
2. 382 views
i have 5 questions, i don't know how to solve these questions.7= 2 +5(z-2) 15(s-3)=12s-43 2a-6=3(a-4) 2(b-3)+5=3(b-1) 6x +7 / 5
1. 1 answer
2. 332 views

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