Monday

September 22, 2014

September 22, 2014

Number of results: 63,118

**college: physics**

A 4.00 102-kg piano is being lifted at a steady speed from ground level straight up to an apartment 16.0 m above the ground. The crane that is doing the lifting produces a steady power of 4.00 102 W. How much time does it take to lift the piano?
*October 12, 2009 by Anonymous*

**algebra**

102 litre+0.01 m^3=? 102 liters is 102 * 10^-6 m^3 still confused x2+10=
*February 3, 2007 by Marcela*

**Physics**

A 1.0 102 g piece of copper at a temperature of 460 K and a 2.0 102 g piece of aluminum at a temperature of 2.2 102 K are dropped into an insulated bucket containing 5.0 102 g of water at 280 K. What is the equilibrium temperature of the mixture? (Use the specific heats found ...
*November 26, 2012 by Ray*

**statistics**

It is known that the population mean for the Full Scale IQ of the WAIS is 100 with a standard deviation of 15. A researcher assesses a sample of 200 adults and find that they have a mean Full Scale IQ of 102. The point estimate of the mean for this group is ___________ and the...
*April 14, 2014 by Sally*

**statistics**

It is known that the population mean for the Full Scale IQ of the WAIS is 100 with a standard deviation of 15. A researcher assesses a sample of 200 adults and find that they have a mean Full Scale IQ of 102. The point estimate of the mean for this group is ___________ and the...
*April 15, 2014 by Katie*

**statistics**

It is known that the population mean for the Full Scale IQ of the WAIS is 100 with a standard deviation of 15. A researcher assesses a sample of 200 adults and find that they have a mean Full Scale IQ of 102. The point estimate of the mean for this group is ___________ and the...
*April 16, 2014 by Stacey*

**college chem**

The cation M2+ reacts with NH3 to form a series of complex ions as follows: M2+ + NH3 M(NH3)2+ K1 = 102 M(NH3)2+ + NH3 M(NH3)2 2+ K2 = 103 M(NH3)2 2+ + NH3 M(NH3)3 2+ K3 = 102 A 1.0 × 10–3 mol sample of M(NO3)2 is added to 1.0 L of 15.0 M NH3 (Kb = 1.8 × 10–5). What is the ...
*April 24, 2011 by richard *

**Math**

For the following data... 1. Provide evidence as to whether this data set if Gaussian or non Gaussian. 2. Determine the normal reference range. 3. Define a cut-off. Describe how a ROC curve can be used to determine such. 95 95 81 95 98 79 88 98 84 79 98 84 81 96 102 86 90 101 ...
*April 12, 2012 by Joe*

**Physics**

On the moon the surface temperature ranges from 395 K during the day to 1.02 x 102 K at night. Convert these temperatures to the Celsius and Fahrenheit scales. (a) 395 K in degrees Celsius; (b) 395 K in degrees Fahrenheit; (c) 1.02 x 102 K in degrees Celsius; (d) 1.02 x 102 K ...
*December 11, 2012 by Anonymous*

**chemistry please help **

The FM band of radio waves are measured in megahertz (MHz), which are the numbers you see on the radio dial. Therefore, a radio station at 102.5 on the FM dial has a frequency of 102.5 MHz or 102,500,000 Hz. What is the wavelength of the radio station that has a frequency of ...
*October 31, 2010 by Tamina*

**College Physics**

Suppose the Eskimo is pushing the same 50.0-kg sled across level terrain with a force of 51.5 N. If he does 3.85 102 J of work on the sled while exerting the force horizontally, through what distance must he have pushed it?
*October 6, 2012 by Meghan *

**Physics**

A 3.60 102-kg piano is being lifted at a steady speed from ground level straight up to an apartment 18.0 m above the ground. The crane that is doing the lifting produces a steady power of 4.00 102 W. How much time does it take to lift the piano?
*February 25, 2008 by Peter*

**Statistics**

98,99,99,103,101,102,104,89,87,90,90 Within how many standard deviations of the mean is the value 102?
*June 5, 2012 by Anonymous*

**Statistics**

87,89,90,90,98,99,99,101,102,103,104 Within how many standard deviations of the mean is the value 102?
*June 5, 2012 by Anonymous*

**college chemistry**

.361 g of a non-volatile solute is dissolved in 160.0 g of water. The solute does not react with water nor dissociate in solution. Assume that the resulting solution displays ideal Raoult's law behaviour. At 90 oC the vapour pressure of the solution is 5.1701×102 torr. (The ...
*February 18, 2011 by silver*

**college physics**

A drag racer, starting from rest, speeds up for 402 m with an acceleration of +24.0 m/s2. A parachute then opens, slowing the car down with an acceleration of -5.40 m/s2. How fast is the racer moving 3.75 102 m after the parachute opens
*January 31, 2010 by brittany*

**College Physics 1**

A drag racer, starting from rest, speeds up for 402 m with an acceleration of +24.0 m/s2. A parachute then opens, slowing the car down with an acceleration of -5.40 m/s2. How fast is the racer moving 3.75 102 m after the parachute opens
*January 31, 2010 by james*

**College Physics 1**

A drag racer, starting from rest, speeds up for 402 m with an acceleration of +24.0 m/s2. A parachute then opens, slowing the car down with an acceleration of -5.40 m/s2. How fast is the racer moving 3.75 102 m after the parachute opens
*January 31, 2010 by james*

**physics**

10. The following three point charges are placed on the x axis: +5.0 mC at x=0; +4.0 mC at x= -40 cm; and +6.0 mC at x= +80 cm. Find (a) the electric field magnitude and direction and (b) the electric potential at x= +10 cm. a) E = k(5E-6)/.102 +k(4E-6)/.502 - k(6E-6)/.702 = +...
*January 11, 2010 by tv*

**Physics 102 (College)**

A few homework problems. 1) The temp of a monotomic ideal gas remains constant (isothermic) during a process in which 4250 J of heat flows out of gas. How much work is done? Pos/neg? delta T = 0 and delta U = 0 by inference Q = 4250 U = 3/2 nRT Thanks for help/hints
*February 27, 2011 by Carla*

**Physics**

A certain CD has a playing time of 76 minutes. When the music starts, the CD is rotating at an angular speed of 4.8 102 revolutions per minute (rpm). At the end of the music, the CD is rotating at 2.1 102 rpm. Find the magnitude of the average angular acceleration of the CD. ...
*March 24, 2008 by John*

**Math (check my work please?)**

A baseball player has 34 hits in 102 times at bat. Another baseball player has 24 hits in 96 times at bat. Write each player's batting average. Here's what I did: 34/102 = BP #1 24/96 = BP #2 34/102 = 1/3 24/96 = 1/4 1/3 --> 4/12 1/4 --> 3/12 4/12 + 3/12 = 7/12 7/12 ...
*October 16, 2013 by Teresa Perri*

**physics**

A motorcycle (mass of cycle plus rider = 3.0 102 kg) is traveling at a steady speed of 20 m/s. The force of air resistance acting on the cycle and rider is 1.8 102 N. Find the power necessary to sustain this speed under the following conditions. (a) the road is level (b) the ...
*October 26, 2010 by joshua*

**physics**

A cheetah runs a distance of 102 m at a speed of 27 m/s and then runs another 102 m in the same direction at a speed of 34 m/s. What is the cheetah's average speed?
*September 18, 2010 by john*

**Math**

What is the cardinal number for the following sets? A) 101,102,103,104,.......121 B) (1,2), (101,102), (0,105)
*December 11, 2008 by Bria*

**Math**

What is the cardinal number for the follwing sets? 1). 101,102,103,104,....121 2). (1,2) (101,102) (0,105)
*December 11, 2008 by Bria*

**Chemistry**

If a system has 2.50 × 102 kcal of work done to it, and releases 5.00 × 102 kJ of heat into its surroundings, what is the change in internal energy of the system?
*November 11, 2011 by Harley*

**statistics**

98,99,99,103,101,102,104,89,87,90,90 Find the 25th and 75th percentiles. Within how many standard deviations of the mean is the value 102. Find the interquartile range.
*June 4, 2012 by Anonymous*

**College Math**

A seismograph 300 km from the epicenter of an earthquake recorded a maximum amplitude of 5.3 102 µm. Find this earthquake's magnitude on the Richter scale. (Round your answer to the nearest tenth.)
*April 16, 2012 by Yvonne*

**Physics**

A baseball with a mass of 0.15 kilograms collides with a bat at a speed of 40 meters/second. The duration of the collision is 8.0 × 10-3 seconds. The ball moves off with a speed of 50 meters/second in the opposite direction. What is the value of the force? A. 1.8 × 102 newtons...
*March 15, 2013 by fredrick*

**Physics 102 (College)**

I'm stuck on part B of this question: A system does 125 J of work on environment and gains 79 J of heat in the process. Find change in internal energy (delta U, abbreviated dU)of a. the system and b. the environment. A. Find dU of the system W = 125 J Q = 79 J dU = Q - W dU...
*February 27, 2011 by Carla*

**Physics 102 (College)**

I'm stuck on part B of this question: A system does 125 J of work on environment and gains 79 J of heat in the process. Find change in internal energy (delta U, abbreviated dU)of a. the system and b. the environment. A. Find dU of the system W = 125 J Q = 79 J dU = Q - W dU...
*February 27, 2011 by Carla*

**chem**

C2H4Br2 + 3 I- -> C2H4 + 2Br- + I3- [C2H4Br2]M [I1]M Initial Rate (M/s) 1 0.127 0.102 6.45 x 10-5 2 0.343 0.102 1.74 x 10-4 3 0.203 0.125 1.26 x 10-4 Determine the order of the reaction in C2H4Br2:
*February 4, 2007 by kim*

**college physics**

This site is just a front for liveperson Most college physics questions are not answered for months if ever. Out of "200 experts" you must have somebody who knows physics right? Guess not.
*September 30, 2009 by john*

**physics**

A missile of mass 1.10 102 kg is fired from a plane of mass 5.50 103 kg initially moving at a speed of 3.15 102 m/s. If the speed of the missile relative to the plane is 1.06 103 m/s, what is the final velocity of the plane?
*November 29, 2012 by Anthony*

**physics**

A missile of mass 1.20 102 kg is fired from a plane of mass 5.50 103 kg initially moving at a speed of 3.05 102 m/s. If the speed of the missile relative to the plane is 1.21 103 m/s, what is the final velocity of the plane?
*March 14, 2014 by Anonymous*

**Please help with steps: Geometry**

Two mountain bikers have been separated and are hoping to find each other. One biker reads on her GPS that she is located at 102.9 degrees west and 44.1 degrees north. She decides to ride towards the mountain peak, which on the map has the coordinates 102.5 degrees west and 44...
*November 2, 2011 by Erika*

**College Math**

High Knob Mountain is 4044 ft. high. What is this distance in meters? The answer I put was (B)102.8m. Is this the correct answer? If no, what am I doing wrong? The other answers to choose from are: (A) 6470m, (C) 1233m (D) 4000m
*August 28, 2012 by Carol*

**Chemistry**

You have 4.271 x 102 mL of oxygen gas (O2) at 7.656 x 102 mm of Hg and 78 oC. What is the mass of the sample in milligrams? When alcohol evaporates according to the equationC2H5OH(l) --> C2H5OH(g), how many liters of gaseous alcohol, measured at STP, are created by the ...
*April 17, 2013 by Tif*

**College Chemistry**

A 0.05 molal aqueous solution boils at 373.102 K. What is the salt in question? a. AlCl3 b. NaHSO3 c. MgCl2 d. NH4Cl e. NaCl I guessed NH4Cl and got 3 points off. I used the formula delta T=K boiling point X molality
*March 28, 2010 by Donna*

**Chemistry **

You have 4.271 x 102 mL of oxygen gas (O2) at 7.656 x 102 mm of Hg and 78 oC. What is the mass of the sample in milligrams? What is the ratio of effusion rates for a light gas, such as HF, to a heavy gas, such as UF4?
*April 16, 2013 by Tif*

**CHEMISTRY HELP !!!! **

Al3+ is reduced to Al(s) at an electrode. If a current of 2.75 ampere is passed for 36 hours, what mass of aluminum is deposited at the electrode? Assume 100% current efficiency. a. 9.2 x 10–3 g b. 3.3 x 101 g c. 9.9 x 101 g d. 1.0 x 102 g e. 3.0 x 102 g I think it is either B...
*May 7, 2014 by Anonymous*

**chemistry**

A balloon is filled to a volume of 5.0 102 mL at a temperature of 28.0°C. The balloon is then cooled at constant pressure to a temperature of 1.00 102 K. What is the final volume of the balloon? the answer i got is v=166.66666667 My question is what is the correct sig. figures...
*April 29, 2010 by chase*

**Physics**

A flywheel with a diameter of 2.45 m is rotating at an angular speed of 74.1 rev/min. (a) What is the angular speed of the flywheel in radians per second? (b) What is the linear speed of a point on the rim of the flywheel? (c) What constant angular acceleration (in revolutions...
*November 9, 2011 by kyle*

**physics 102**

What are the wavelengths of electromagnetic wave in free space that have the following frequencies? (a) 3.00 10^19 Hz pm (b) 7.50 10^9 Hz cm
*August 9, 2012 by Matt Will*

**math**

A chemist has 30%, 40 % and 80 % acid solutions. All three were to be mixed to make 4.00 x 102 L of 38% acid solution but a mistake was made and the amounts of 30% and 80 % were reversed. The result was 4.00 X 102 L of 65 % acid solution. What were the amounts of each solution...
*November 17, 2012 by David*

**Math(Can someone please answer!!)**

ln [2.30E-2] = ln(0.102) - (k s-1)(2360 s) k = 6.31E-4 s -1 I did 2360k = 1n(0.102 * 0.023) 2360k = -6.055 then I divided 2360 by -6.055 but I didnt get 6.31e-4. Where did I mess up???
*March 11, 2012 by Hannah*

**chem**

The molarity and the molality of a solution prepared by dissolving 2.00 g of ethanol C2H5OH with 100.0 g of water to give a final volume 102 mL are would i just add both the grams and divide by 102 for molarity? and molalty i would just add the mass?
*August 8, 2008 by so*

**Chemistry**

A balloon is filled to a volume of 1.0 102 mL at a temperature of 38.0°C. The balloon is then cooled at constant pressure to a temperature of 1.00 multiplied by 102 K. What is the final volume of the balloon?
*June 11, 2010 by Brittney*

**physivs**

A certain CD has a playing time of 68 minutes. When the music starts, the CD is rotating at an angular speed of 4.8 102 revolutions per minute (rpm). At the end of the music, the CD is rotating at 2.1 102 rpm. Find the magnitude of the average angular acceleration of the CD. ...
*December 4, 2010 by Anonymous*

**Physics 102**

What would be the path of the Moon if somehow all gravitational forces on it vanished to zero?
*September 23, 2013 by Miss Angie*

**chemistry**

A fuel mixture used in the early days of rocketry is composed of two liquids, hydrazine (N2H4) and dinitrogen tetraoxide (N2O4), which ignite on contact to form nitrogen gas and water vapor. 2 N2H4 + N2O4 --> 3 N2 + 6 H2O If 1.50 x 102 g of N2H4 and 2.00 x 102 g of N2O4 are...
*November 4, 2012 by Sheree'*

**AP Chemistry**

A balloon is filled to a volume of 2.0 102 mL at a temperature of 33.0°C. The balloon is then cooled at constant pressure to a temperature of 1.00 102 K. What is the final volume of the balloon?
*October 15, 2012 by Ashley*

**Note to physics, chemistry students**

Please note the spelling of Physics, and Chemistry. If you are a college student in those courses, and cant spell them, frankly, asking for help here is insulting to your college and you.
*October 26, 2008 by bobpursley*

**physics**

What is the longest wavelength for standing sound waves in a 102.0 cm long tube that is open at both ends?
*December 4, 2010 by Josh*

**Check Answers Quick -Physics**

What causes the centripetal acceleration of an electron in a hydrogen atom? electrical attraction gravity friction <-- tension Question 2. Which of the following terms might a jet pilot use to describe a force that presses him against his seat during a high-speed turn? ...
*December 16, 2013 by Greg*

**college physics**

My previous question was marked science, but it's specifically a college physics question. Thanks.
*October 25, 2013 by bbragg*

**physics**

At highway speeds, a particular automobile is capable of an acceleration of about 1.6 m/s2. At this rate, how long does it take to accelerate from 79 km/h to 102 km/h?
*September 21, 2011 by Morgan*

**physics**

A plane travels 5.1 102 m while being accelerated uniformly from rest at the rate of 4.9 m/s2. What final velocity does it attain?
*November 21, 2011 by jacq*

**college physics**

cost of homework help for college physics
*September 27, 2011 by mae*

**physics**

please HELP!!! What is the magnitude of the momentum of a baseball (m = 1.450 kg) traveling at a speed of 102 mi/h? Express your answer in SI units. I am unsure where to start
*September 26, 2010 by bill*

**physics**

a person whos mass is 102 kg stands on a beam supported by two ropes , A and B, he is standing on one foot to help you solve this problem.
*October 26, 2009 by vic*

**algebra am i right**

Find the volume of a right circular cylinder whose base has an area of 6 cm^2 and whose height is 17 cm. [A] 153đ cm^3 [B] 612đ cm^3 [C] 102 cm^3 [D] 153đ cm^2 [E] None of these i think its C Please show your work. That's the right answer, but we'd like to know why too. um i ...
*September 27, 2006 by cassii*

**Math for Educators**

Use Gauss's approach to find the following sums (do not use formulas). a. 1 + 2 + 3 + 4 +...+ 102 b. 1 + 3 + 5 + 7 +...+1001 a. The sum of the sequence is ? My answer 102-51(103)= 5,253 b. The sum of the sequence is? My answer 500.3(1,002)=501,300.6 Are my answers correct? If ...
*June 4, 2013 by Carol*

**Math**

Annie's math test scores are 68 82 82 88 92 98 Her median test score is.. A.30 B.82 C.85 D.88 C? The high temperature for the last 5 days were 28,28,32,55,77 What is the range? A.28 B.32 C.44 D.49 D? The high temperature for six days in August were 93,98,100,102,102,105 What ...
*March 21, 2013 by Jerald*

**physics**

A boy weighing 4.2 102 N jumps from a height of 1.80 m to the ground below. Assume that the force of the ground on his feet is constant. (a) Compute the force of the ground on his feet if he jumps stiff-legged, the ground compresses 2.20 cm, and the compression of tissue and ...
*February 3, 2011 by Anonymous*

**Chemistry**

Question: A sample of Freon-12 (CF2Cl2) occupies 2.261 x 101 L at 337 K and 2.917 x 102 kPa. Find its volume (in L) at standard temperature and pressure (STP). Equation: p1v1/t1=p2v2/t2 My Work: (2.917 x 102 kPa)(2.261x101 L)/337K = (101.3 kpa)( x )/273 k My Answer: 543.4 L Is...
*July 13, 2011 by Bradley*

**physics**

Assuming maximal power output, how long, in seconds, would it take a 1,535 kg car with a 128 hp engine to accelerate from 50 km/h to 102 km/h? (1 hp = 746 W)
*November 8, 2011 by Lydia*

**Rate of change problem**

In 1993, 90 houses were built. in 1997, 102 more houses were built. find the average rate of change in the number of new homes built. express the result in terms of new houses built per year. a. 1/3 b. 102/90 c. 3/1 d. 5/2 could you explain it too? i dont really get how to set...
*December 30, 2012 by kathy m.*

**economics**

year nominal GDP GDP deflator (billions) (based year 1992) 1993 725 101.2 1994 762 102.4 Are these answeres correct???? 4.a) The growth rate of nominal income between 1993 and 1994 is 5.10% (725-762)/725*100=5.10% b) The growth rate of the GDP deflator between 1993 and 1994 is...
*September 26, 2006 by shelby*

**physics**

A 34.5 cm wire carrying a current of 12.0 A passes through a magnetic field of 2.35 x 102 T. (a) What is the maximum force exerted on the wire?
*January 5, 2011 by Anonymous*

**Physics**

A particle's constant acceleration is north at 108 m/s2. At t = 0, its velocity vector is 61.7 m/s east. At what time will the magnitude of the velocity be 102 m/s?
*September 20, 2012 by Caitlin*

**College Help**

I'm going to college this September, and would like to know of any good web sites for beginning college students.
*July 28, 2008 by Sally*

**misc.**

if something says your pursuing a college degree does that mean your in college are are planning in the future to go to college?
*May 27, 2011 by Sara*

**Physics**

How much heat is required to completely boil away 0.200 kg of water (Hv = 2.26 × 10^3 kJ/kg)? (Points : 1) 4.52 × 102 kJ 2.26 × 103 kJ 4.52 × 103 kJ 1.13 × 104 kJ
*March 20, 2014 by Me and I*

**physics**

The radius of curvature of a convex mirror is 1.60 x 102 cm. An object that is 11.0 cm high is placed 40.0 cm in front of this mirror. Determine (a) the location and (b) the height of the image.
*November 14, 2012 by johnathan *

**Physics 102**

Why do the passengers in high-altitude jet planes feel the sensation of weight while passengers in the International Space Station do not?
*September 25, 2013 by Miss Angie*

**CHEMISTRY HELP !!!! CHECK !!!**

Al3+ is reduced to Al(s) at an electrode. If a current of 2.75 ampere is passed for 36 hours, what mass of aluminum is deposited at the electrode? Assume 100% current efficiency. a. 9.2 x 10–3 g b. 3.3 x 101 g c. 9.9 x 101 g d. 1.0 x 102 g e. 3.0 x 102 g Answer 2.75 A for 36 ...
*May 8, 2014 by YULCHANG*

**Chem**

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 and 0.145 M of H20. What would be the equilibrium concentration of [CO]? I so far have kc= [H2][CO2]/[CO][H2O]= 102 I know i have to set up an ...
*March 21, 2010 by Katie*

**Statistics Question (Confidence Interval)**

A sample of 15 recent college graduates found that starting salaries for attorneys in New York City had a mean of $102,342 and a standard deviation of $21,756. Construct a 95% confidence interval for the average starting salary of all attorneys in the city. A. (89869.82, ...
*March 14, 2012 by Mark*

**physics**

A heavy bank-vault door is opened by the application of a force of 3.0 x 102 N directed perpendicular to the plane of the door at a distance of 0.80 m from the hinges. What is the torque?
*January 13, 2011 by Faith*

**CHEMISTRY**

I used 10mL of unknown NaCl-NaBr mixture titrate with 0.10M silver nitrate solution. 10.15mL of silver nitrate solution is used. the conc. of NaCl-NaBr mixture is 8g/dm3 I need to calculate the % composition of the NaCl-NaBr mixture. I used the following calculation steps but ...
*April 29, 2010 by albee*

**statistics**

At a small college it is known from previous years that 35% of all college freshman start in college algebra. The new freshman class has 100 students in it, What is the probability that between 35 and 42 freshman will start in college algebra? Is it reasonable to approximate ...
*March 23, 2012 by lola*

**persuasive essay!!**

Is it better to go to college and be successful or open your own business without a college degree? Need help writing thesis. What are some benefits of going to college rather than not going to college and opening your own business
*March 24, 2008 by Taniya*

**College Physics**

College Physics- Inertia? Find the moment of inertia about each of the following axes for a rod that is 0.300 in diameter and 1.60 long, with a mass of 5.00×10−2 . How do you find this ? I know how to find the perpendicular and end . but this? About an axis along the ...
*October 10, 2012 by Herosugar*

**Physics **

A bullet with mass 4.91 g is fired horizontally into a 1.981-kg block attached to a horizontal spring. The spring has a constant 6.25 102 N/m and reaches a maximum compression of 6.38 cm.
*June 1, 2011 by sarah*

**statistics**

It is known that the population mean for the Full Scale IQ of the WAIS is 100 with a standard deviation of 15. A researcher assesses a sample of 200 adults and find that they have a mean Full Scale IQ of 102. The point estimate of the mean for this group is ___________ and the...
*April 15, 2014 by Katie*

**Statistics**

What percentage of college students are attending a college in the state where they grew up? Let p be the proportion of college students from the same state as that in which the college resides. If no preliminary study is made to estimate p, how large a sample is needed to be ...
*August 1, 2012 by Anonymous*

**Physics**

A driver in a car traveling at a speed of 67 km/h sees a cat 104 m away on the road. How long will it take for the car to accelerate uniformly to a stop in exactly 102 m?
*September 8, 2012 by Rachel*

**Chemistry**

A sample of nitrogen gas is confined in a 8.494 L container at 2.643 x 102 torr and 50 oC. How many moles of gas are present in the sample? So I thought I set this problem up right and when I type the answer into CALM my answer is incorrect. This is what I did: PV=nRT (2.643 x...
*January 20, 2014 by Cassie*

**Science**

A sample of nitrogen gas is confined in a 8.494 L container at 2.643 x 102 torr and 50 oC. How many moles of gas are present in the sample? So I thought I set this problem up right and when I type the answer into CALM my answer is incorrect. This is what I did: PV=nRT (2.643 x...
*January 20, 2014 by Cassie*

**Physics 102**

THIS IS A QUESTION IN MY PHYSICS BOOK & I REALLY REALLY NEED HELP. I AM 48YRS OF AGE JUST DECIDED TO GO BACK TO SCHOOL AND HONESTLY KNOW NOTHING ABOUT PHYSICS. Two facts: A freely falling object at Earth’s surface drops vertically 5 m in 1 s. Earth’s curvature “drops” 5 m for...
*September 25, 2013 by Miss Angie*

**physics**

A 102.0 N grocery cart is pushed 13.0 m by a shopper who exerts a constant horizontal force of 54.0 N. If all frictional forces are neglected and the cart starts from rest, what is its final speed?
*November 12, 2010 by derek*

**Physics**

A uniform beam of length L = 8.00 m and weight 3.80 102 N is carried by two workers, Sam and Joe, as shown in the figure below. Determine the force that each person exerts on the beam.
*April 1, 2014 by Joe*

**Physics**

A uniform beam of length L = 8.00 m and weight 3.80 102 N is carried by two workers, Sam and Joe, as shown in the figure below. Determine the force that each person exerts on the beam.
*April 2, 2014 by Joe*

**Physics**

A uniform beam of length L = 8.00 m and weight 3.80 102 N is carried by two workers, Sam and Joe, as shown in the figure below. Determine the force that each person exerts on the beam.
*April 2, 2014 by Joe*

**Physics**

A uniform beam of length L = 8.00 m and weight 3.80 102 N is carried by two workers, Sam and Joe, as shown in the figure below. Determine the force that each person exerts on the beam.
*April 3, 2014 by Joe*

**Pre Calc**

To determine the height of the Louisiana-Pacific (LP) Tower, the tallest building in Conroe, Texas, a surveyor stands at a point on the ground, level with the base of the LP building. She measures the point to be 320ft from the building's base and the angle of elevation to the...
*February 12, 2010 by Phillip*

**Physics**

HI! :( Im sorry to bother you guys but I need help on only these three questions. I'm not trying to cheat but these three are really confusing. This is the first time I've ever asked for help on the internet haha. Please dont be upset I promise this is the only time. 13. You ...
*October 17, 2012 by Godrick*

**physics**

A cannon shell is fired up in the air at an initial speed of 225m/s. After how much timeis the shell at a height of 6.20 X 102 and heading down. What equation would be used to solve this?
*February 12, 2011 by NeedHelp*

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