Thursday
April 17, 2014

Search: Calculate the oscillation frequency f of the \rm H_{2} molecule

Number of results: 28,539

Calculate the oscillation frequency f of the H2 mo
When displaced from equilibrium by a small amount, the two hydrogen atoms in an \rm H_{2} molecule are acted on by a restoring force F_{x}=-k_1 x with k_1 = 510 N/m. Calculate the oscillation frequency f of the H2 molecule. Use m_eff = m/2 as the "effective mass" of the system...
Thursday, April 15, 2010 at 3:15pm by Tyler

pllllls heeeeeeeeelp math
It's trivial: 1/H_{n} - 1/H_{n-1} = [H_{n-1} - H_{n}]/[H_{n}H_{n-1}] = -1/[n H_{n}H{n-1}]
Thursday, June 6, 2013 at 12:01pm by Count Iblis

Chemistry
In the following experiment, a coffee-cup calorimeter containing 100 \rm mL of \rm H_2O is used. The initial temperature of the calorimeter is 23.0 \rm ^{\circ}C. If 9.80 g of \rm CaCl_2 is added to the calorimeter, what will be the final temperature of the solution in the ...
Sunday, June 17, 2012 at 1:35pm by Ali

Physics
An ac generator supplies an rms voltage of 5.00 {\rm V} to an RL circuit. At a frequency of 21.0{\rm kHz} the rms current in the circuit is 45.0 {\rm mA}; at a frequency of 26.0{\rm kHz} the rms current is 40.0 {\rm mA}. Find value of L an R ?
Monday, July 30, 2012 at 11:37pm by AJ

chem
Osmolarity (Osm) is the molar concentration of the particles-molecules and/or ions-in a solution. In physiological solutions, 5 \% ({\rm m/v}) glucose ({\rm C}_{6}{\rm H}_{12}{\rm O}_{6}) and 0.9 \% ({\rm m/v}) {\rm NaCl}, the osmolarity must be the same as for the blood, ...
Monday, April 11, 2011 at 11:56pm by Anonymous777

chem
Osmolarity (Osm) is the molar concentration of the particles-molecules and/or ions-in a solution. In physiological solutions, 5 \% ({\rm m/v}) glucose ({\rm C}_{6}{\rm H}_{12}{\rm O}_{6}) and 0.9 \% ({\rm m/v}) {\rm NaCl}, the osmolarity must be the same as for the blood, ...
Monday, April 11, 2011 at 11:58pm by Anonymous100

chemistry
A 75.0-\rm mL volume of 0.200 M \rm NH_3 (K_{\rm b}=1.8\times 10^{-5}) is titrated with 0.500 M \rm HNO_3. Calculate the \rm pH after the addition of 13.0 mL of \rm HNO_3.
Sunday, November 28, 2010 at 5:17pm by sam

chem
Calculate the specific heat (\rm{J/g \; ^\circ C}) for a 18.5-\rm g sample of tin that absorbs 183 {\rm J} when temperature increases from 35.0 ^\circ \rm C to 78.6 ^\circ \rm C.
Thursday, June 10, 2010 at 5:10pm by andy

chemistry
Calculate the specific heat (\rm{J/g \; ^\circ C}) for a 18.5-\rm g sample of tin that absorbs 183 {\rm J} when temperature increases from 35.0 ^\circ \rm C to 78.6 ^\circ \rm C
Sunday, September 12, 2010 at 12:21am by bob

Chem104
Calculate the specific heat \((\rm{J/g \; ^\circ C})\) for a 18.5-\(\rm g\) sample of tin that absorbs 183 \({\rm J}\) when temperature increases from 35.0 \(^\circ \rm C\) to 78.6 \(^\circ \rm C\).
Saturday, October 12, 2013 at 6:07pm by Thobile

physics
The difference in energy between allowed oscillator states in HBr molecules is 0.330 eV. What is the oscillation frequency of this molecule?
Thursday, November 28, 2013 at 4:45pm by Austin

Chemistry
Which buffer system is the best choice to create a buffer with \rm pH = 9.00? {\rm HF}/{\rm KF} {\rm{HNO}}_2 / {\rm{KNO}}_2 {\rm{NH}}_3 /{\rm{NH}}_4 {\rm{Cl}} {\rm HClO}/{\rm KClO}
Monday, March 25, 2013 at 1:46am by Anonymous

math
Calculate the mass percent ({\rm m}/{\rm m}) for the solute in each of the following solutions: 95g of {\rm NaOH} in 365g of {\rm NaOH} solution
Wednesday, October 24, 2012 at 11:03pm by hayleyg

chemistry
A solution is prepared by dissolving 20.2 {\rm mL} of methanol ({\rm{CH}}_3 {\rm{OH}}) in 100.0 {\rm mL} of water at 25 ^\circ {\rm C}. The final volume of the solution is 118 {\rm mL}. The densities of methanol and water at this temperature are 0.782 {\rm g/mL} and 1.00 {\rm ...
Saturday, July 14, 2012 at 10:14am by aa

physics
A stone is thrown horizontally at 30.0 {\rm m}/{\rm s} from the top of a very tall cliff. Calculate its horizontal position and vertical position at 2 {\rm s} intervals for the first 10.0 {\rm s}.
Wednesday, September 22, 2010 at 6:15pm by Anonymous

Physics
The frequency of oscillation of a pendulum is 7 Hz. What is the period of oscillation?
Monday, March 10, 2014 at 3:53pm by Amanda

chemistry
If 35.7{\rm mL} of 0.205{\rm M} {\rm KOH} is required to completely neutralize 20.0{\rm mL} of a {\rm HC_2H_3O_2} solution, what is the molarity of the acetic acid solution? {\rm HC_2H_3O_2}(aq) + {\rm KOH}(aq) \to {\rm KC_2H_3O_2}(aq) + {\rm H}_{2}{\rm O}(l)
Monday, July 30, 2012 at 5:36am by Anonymous

Chemistry
Maleic acid is a carbon-hydrogen-oxygen compound used in dyeing and finishing fabrics and as a preservative of oils and fats. * In a combustion analysis, a 1.054-\rm g sample of maleic acid yields 1.599 \rm g of \rm CO_2 and 0.327 \rm g of \rm H_2O. * When 0.609 \rm g of ...
Tuesday, April 24, 2012 at 2:55pm by Shelby

chemistry
How many milliliters of 3.60 {\rm M} {\rm HCl} are required to react with 140 {\rm mL} of 1.60 {\rm M}{\rm Al}({\rm OH})_{3}?
Saturday, April 23, 2011 at 5:54pm by Ivy

chemistry
How many grams of water can be cooled from 35^\circ {\rm C} to 16^\circ {\rm C} by the evaporation of 57{\rm g} of water? (The heat of vaporization of water in this temperature range is 2.4 {\rm kJ}/{\rm g}. The specific heat of water is 4.18 {\rm J}/{\rm g}\cdot {\rm K}.)
Thursday, April 4, 2013 at 12:24pm by Anonymous

chemistry
Follow the steps provided in the simulation to add water to the graduated cylinder, select one of the three samples (copper, silver, or gold), set its mass to the values given in the statements below, find its volume, and calculate its density. To save time, you can ...
Wednesday, September 21, 2011 at 9:07pm by fatimah

physics
You stand on the end of a diving board and bounce to set it into oscillation. You find a maximum response in terms of the amplitude of oscillation of the end of the board when you bounce at frequency f. You now move to the middle of the board and repeat the experiment. Is the ...
Sunday, December 2, 2012 at 1:51am by lilly

Chemistry
A lactic acid/lactate ion buffer solution contains 0.23 \it M \rm HC_3H_5O_3 and 0.65 \it M \rm C_3H_5O_3{}^-, respectively. The K_{\rm a} value of lactic acid is 1.4\times 10^{-4}. Calculate the \rm pH of this buffer.
Saturday, June 5, 2010 at 1:00pm by Karen

Chemistry
A 0.22-caliber handgun fires a 27-{\rm g} bullet at a velocity of 765 {\rm m}/{\rm s}. Part A Calculate the de Broglie wavelength of the bullet.
Saturday, June 30, 2012 at 2:37pm by Anonymous

Physics
A mass is attached to a spring stretches it 2.5 cm from equilibrium. The mass is lightly tapped and set in an oscillation. What is the angular frequency of the of the oscillation?
Tuesday, February 19, 2013 at 2:53pm by Andy

chemistry
25.6 {\rm mL} of ethanol (density =0.789 {\rm g}/{\rm mL}) initially at 8.0^\circ {\rm C} is mixed with 39.5 {\rm mL} of water (density = 1.0 {\rm g}/{\rm mL}) initially at 23.1^\circ {\rm C} in an insulated beaker. Assuming that no heat is lost, what is the final temperature ...
Wednesday, February 22, 2012 at 8:00pm by MD

physics
Two loudspeakers, A and B, are driven by the same amplifier and emit sinusoidal waves in phase. The frequency of the waves emitted by each speaker is 172 \rm Hz. You are 8.00 \rm m from speaker A. Take the speed of sound in air to be 344 \rm m/s. What is the closest you can be...
Wednesday, November 10, 2010 at 9:02am by sarah

chemisry
Calculate the density in g/mL {\rm g}/{\rm mL} of 2.0L {\rm L} of gasoline that weighs 1.29kg kg . Express your answer to two significant figures and include the appropriate units
Thursday, September 5, 2013 at 8:24am by Kristy

pls heeelp math
Read this: http://en.wikipedia.org/wiki/Telescoping_series Then sum both sides of: 1/H_{n} - 1/H_{n-1} = -1/[n H_{n}H{n-1}] from n = 4 to infinity, the left hand side is then a telescoping series.
Friday, June 7, 2013 at 8:27am by Count Iblis

chemistry
Calculate the amount of heat required to heat a 3.7{\rm kg} gold bar from 30^\circ {\rm C} to 61^\circ {\rm C}. Specific heat capacity of gold is 0.128 \rm J/g ^\circ C
Wednesday, September 19, 2012 at 1:21am by John

chemistry
Calculate the amount of heat required to heat a 3.6{\rm kg} gold bar from 20^\circ {\rm C} to 70^\circ {\rm C}. Specific heat capacity of gold is 0.128 \rm J/g ^\circ C
Friday, February 1, 2013 at 9:58am by Anonymous

Physics
The oscillation frequency is f = [1/(2 pi)]sqrt (K/m) K is the overall spring constant of the four springs in parallel. The k for each individual spring is K/4. Use the first equation to solve for k and then use k = K/4. For your second question, m increases from 1400 to 1400...
Saturday, July 30, 2011 at 9:32pm by drwls

pls heeelp math
For each positive integer n, let H _{n} = 1/1 +1/2 +⋯+ 1/n sum_{n=4}^{∞} 1/n*H_{n}*H_{n-1}=a/b for relatively prime positive integers a and b, find a+b
Friday, June 7, 2013 at 8:27am by mathslover

chemistry
To calculate an answer to the correct number of significant figures, you must complete all calculations first and then round your final answer as the very last step. In Part C, you are asked to calculate the volume of a rectangular prism that has a length of 5.6 cm \rm cm, a ...
Thursday, August 29, 2013 at 1:14pm by Anonymous

Chemistry
What is the normal boiling point in ∘ C ^\circ {\rm C} of a solution prepared by dissolving 1.50 g {\rm g} of aspirin (acetylsalicylic acid, C 9 H 8 O 4 {\rm C}_{9}{\rm H}_{8}{\rm O}_{4}) in 75.00 g {\rm g} of chloroform (CHCl 3 ) ({\rm CHCl}_{3})? The normal boiling ...
Tuesday, February 4, 2014 at 11:07am by Ren

chemistry
Write formulas for the compounds that form from {\rm Rb} and each of the following polyatomic ion: {\rm NO}_{3}^{-}, {\rm SO}_{4}^{2-}, {\rm PO}_{4}^{3-}.
Monday, September 13, 2010 at 3:11pm by Anonymous

chemistry
If Tums is added to 55.0 {\rm mL} of 0.750 {\rm M}{\rm HCl}, how many grams of {\rm CO}_{2} gas are produced?
Saturday, April 23, 2011 at 5:42pm by Ivy

Chemistry
Citric acid, the compound responsible for the sour taste of lemons, has the following elemental composition: C{\rm C}, 37.51%\%; H{\rm H}, 4.20%\%; O{\rm O}, 58.29%\%.Calculate the empirical formula of citric acid
Wednesday, March 5, 2014 at 11:53am by Ana

chemistry
A 337-\rm mL sample of unknown \rm HCl solution reacts completely with \rm Na_2CO_3 to form 17.1g \rm CO_2. What was the concentration of the \rm HCl solution?
Sunday, April 7, 2013 at 7:48pm by Lauren

science
A mixture of {\rm NaCl} and {\rm NaBr} has a mass of 2.10{\rm g} and is found to contain 0.71{\rm g} of {\rm Na} What is the mass of {\rm NaBr} in the mixture?
Saturday, July 28, 2012 at 2:00pm by nurul

physics
two collinear harmonic oscillation x1=8sin(100pie(t)) and x2=12sin(96pie(t)) are superposed.calculate the *maximum and minimum amplitudes *the frequency of amplitude modulation
Monday, February 13, 2012 at 4:01pm by ashley

chemistry
nitroglycerin (used medically as a vasodilator to treat heart conditions): {\rm C} 15.87\% {\rm H} 2.22\% {\rm N} 18.50\% {\rm O} 63.41\%.
Friday, September 24, 2010 at 5:03pm by Anonymous

chemistry
If 1.00 {\rm mol} of {\rm{N}}_2 has a volume of 47.0 {\rm L} under the reaction conditions, how many liters of gas can be formed by heating 38.5 g of {\rm{NaN}}_3
Thursday, September 30, 2010 at 9:56pm by Anonymous

chemistry
Combustion analysis of a hydrocarbon produced 33.01 g {\rm CO}_2 and 27.04 g {\rm H}_2{\rm O}. Calculate the empirical formula of the hydrocarbon. Express your answer as a chemical formula.
Monday, March 17, 2014 at 11:14pm by david

Physics
well, centripetal force= gravityforce from Earth-Gravityforce from Moon mV^2/Rs=GMem/Rs^2 -GMm*m/(Rm-Rs)^2 where Rs is the orbital distance from earth, Rm is the moon orbital distance. Now, change to period: 2PI*Rs/Period= V (2PI)^2*Rs/Period^2=GMe/Rs^2-GMm/(Rm-Rs)^2 Lets ...
Saturday, May 7, 2011 at 5:18pm by bobpursley

CHEM
Calculate the vapor pressure at 25 C of hexane above the solution. The vapor pressure of pure hexane at 25 C is 151 torr. A solution contains naphthalene ({\rm{C}}_{10} {\rm{H}}_8) dissolved in hexane ({\rm{C}}_6 {\rm{H}}_{14}) at a concentration of 12.17 \% naphthalene by mass.
Saturday, June 5, 2010 at 10:31pm by AMI

Physics
A ^9 {\rm {\rm Be}} nucleus containing four protons and five neutrons has a mass of 1.5010−26 {\rm kg} and is traveling vertically upward at 1.45 {\rm km}/{\rm s}. If this particle suddenly enters a horizontal magnetic field of 1.15 {\rm T} pointing from west to east, ...
Tuesday, April 10, 2012 at 5:46pm by Kaitlin Carter

science
A small mass attached to a spring oscillates with simple harmonic motion with amplitude of 70 mm, taking 13 seconds to make 40 complete oscillation. Calculate its angular frequency?
Tuesday, April 3, 2012 at 7:29am by moemedi

Chemistry
Iron ores have different amounts of iron per kilogram of ore. Calculate the mass percent composition of iron for each iron ore: Fe2O3{\rm Fe_2O_3} (hematite), Fe3O4{\rm Fe_3O_4} (magnetite), FeCO3{\rm FeCO_3} (siderite).
Wednesday, March 5, 2014 at 11:59am by Ana

chemistry
The use of the British thermal unit (Btu {\rm Btu}) is common in much engineering work. (1 Btu {\rm Btu} = 1054J {\rm J}) A Btu {\rm Btu} is the amount of heat required to raise the temperature of 1 lb {\rm lb} of water by 1 ∘ F ^\circ {\rm F}. How many quads of energy ...
Monday, October 7, 2013 at 11:31pm by Anonymous

chemistry
assuming complete dissociation of the solute, how many grams of \rm KNO_3 must be added to 275 \rm mL of water to produce a solution that freezes at -14.5 ^\circ {\rm C}? The freezing point for pure water is 0.0 ^\circ {\rm C} and K_f is equal to 1.86 ^\circ {\rm C}/m.
Monday, February 6, 2012 at 8:25pm by a

physics
In an 8.00 {\rm km} race, one runner runs at a steady 12.0 {\rm km}/{\rm h} and another runs at 14.0 {\rm km}/{\rm h}.
Thursday, October 13, 2011 at 9:29pm by Anonymous

chem
The speed of light is \rm 3.00\times 10^8~m/s. How fast is this in miles per hour (\rm miles/h)? Use the conversion 1 \;{\rm mile} = 1610\; {\rm m}.
Wednesday, September 7, 2011 at 2:43pm by jake

chemistry
Three solutions are mixed together to form a single solution. One contains 0.2 mol \rm mol Pb(CH 3 COO) 2 \rm Pb(CH_3COO)_2, the second contains 0.1 mol \rm mol Na 2 S \rm Na_2S, and the third contains 0.1 mol \rm mol CaCl 2 \rm CaCl_2. Write the precipitation reaction.
Saturday, October 19, 2013 at 11:55am by cc

phy
A major-league catcher gloves a 92 {\rm mi}/{\rm h} pitch and brings it to rest in 0.15 {\rm m}. 1-If the force exerted by the catcher is 803 {\rm N}, what is the mass of the ball?
Saturday, July 16, 2011 at 11:36pm by ivan

chemistry
Copper (II) fluoride contains 37.42% {\rm F} by mass. Use this percentage to calculate the mass of fluorine (in {\rm g}) contained in 56.0{\rm g} of copper (II) fluoride
Monday, September 24, 2012 at 10:10pm by Justin

physics
A uniform stick 1.5 m long with a total mass of 210 g is pivoted at its center. A 3.9-{\rm g} bullet is shot through the stick midway between the pivot and one end The bullet approaches at 250 {\rm{ m}}/{\rm{s}} and leaves at 140 {\rm{ m}}/{\rm{s}}. With what angular speed is ...
Tuesday, April 26, 2011 at 8:24pm by Anonymous

waves and sound
1-A tunning fork has a frequency of 440Hz. The string of a violin and this tuning fork, when sounded together, produce a beat frequency of iHz. From these two pieces of information alone, is it possible to determine the exact frequency of the violin string?... I feel like this...
Sunday, May 17, 2009 at 7:49pm by Cynthia

chemistry
Calculate [\rm H_3O^+] given [\rm OH^-] in each of the following aqueous solutions. [\rm OH^-] = 7.110^11M What calculations do I make from this point? I have plugged in the 7.110^11M into the calculator but am getting the answer wrong every time and do not understand why. ...
Sunday, December 16, 2012 at 8:24pm by jennifer andersen

physics
A mass of 0.394 kg is attached to a spring with a spring constant of 224.2 N/m. Its oscillation is damped, with damping constant b = 14.0 kg/s. What is the angular frequency of this damped oscillation? ω = rad/s
Saturday, April 23, 2011 at 4:06pm by please help!!!!

physics
consider a simple harmonic oscillation with m=0.5kg,k=10N/m and amplitude A=3cm,if the oscillation is released from rest at x=A when the clock is set to t=0,determine the position of the oscillation at t=2s
Monday, September 20, 2010 at 2:50pm by kabelo

physics
The Space Shuttle astronauts use a massing chair to measure their mass. The chair is attached to a spring and is free to oscillate back and forth. The frequency of the oscillation is measured and that is used to calculate the total mass m attached to the spring. If the spring ...
Wednesday, September 5, 2007 at 10:04am by stephanie

physics
The Space Shuttle astronauts use a massing chair to measure their mass. The chair is attached to a spring and is free to oscillate back and forth. The frequency of the oscillation is measured and that is used to calculate the total mass m attached to the spring. If the spring ...
Wednesday, September 5, 2007 at 4:17pm by stephanie

chemistry
Calculate the volume of oxygen you would need, at 1.00 atm \rm atm and 298 K \rm K, to completely oxidize 50g g of glucose
Friday, October 18, 2013 at 12:56am by Anonymous

chem 5
Calculate the moles of {\rm Cu} in 2.51021 atoms of {\rm Cu}.
Friday, June 14, 2013 at 12:27am by pj

physics
A football is thrown with an initial upward velocity component of 13.5 {\rm m}/{\rm s} and a horizontal velocity component of 19.0 {\rm m}/{\rm s}.
Thursday, February 2, 2012 at 8:05pm by Anonymous

physics
Two identical 1.60 {\rm kg} masses are pressed against opposite ends of a spring of force constant 1.85 {\rm N}/{\rm cm}, compressing the spring by 25.0 {\rm cm} from its normal length.
Friday, December 23, 2011 at 12:42pm by Anonymous

physics
for a damped harmonic oscillation , the equation of motion is md^2x/dt^2+(gamma)dx/dt+kx=o with m=0.025kg,(gamma)=0.07kg/s and k=85N/m. *calculate the period of motion *number of oscillation in which its amplitude will become half of its initial value *the number of ...
Monday, February 13, 2012 at 3:56pm by ashley

chemistry
44.0 mL \rm mL of 0.150 M M Na 2 SO 4 \rm Na_2SO_4 and 25.0 mL \rm mL of 0.160 M M KCl M Na + M_{\rm Na^+}, M SO 4 2− M_{\rm {SO_4}^{2-}}, M K + M_{\rm K^+}, M Cl − =????
Sunday, September 29, 2013 at 4:48pm by Anonymous

physics
What is the temperature of 0.54{\rm mol} of gas at a pressure of 1.3{\rm atm} and a volume of 10.9{\rm L} ?
Sunday, May 12, 2013 at 1:40pm by Anonymous

chemistry
(\vm) grams = (\rm)moles x (\rm) molar mass (\rm).
Sunday, March 24, 2013 at 3:10am by DrBob222

Chemistry
how to figure The grams of protein in 1 cup of soup that has 98 {\rm Cal} with 6 {\rm g} of fat and 8 {\rm g} of carbohydrate
Monday, February 7, 2011 at 2:34am by Jen

compose
How many kilojoules of heat are released when 25.0 g of {\rm CO}(g) reacts completely with {\rm H_2}(g) to form {\rm CH_3OH}(g) at constant pressure?
Sunday, March 14, 2010 at 11:35pm by Ryan

General Chemistry (College LvL)
The grams of protein in 1 cup of soup that has 110 {\rm Cal} with 7 {\rm g} of fat and 9 {\rm g} of carbohydrate.
Monday, February 28, 2011 at 3:05am by Anonymous

Physics HELP!!!!!!!!
When an object of mass m1 is hung on a vertical spring and set into vertical simple harmonic motion, its frequency is 12 Hz. When another object of mass m2 is hung on the spring along with m1, the frequency of the motion is 4 Hz. Find the ratio m2/m1 of the masses. w= sqrt (k/...
Wednesday, April 4, 2007 at 8:53pm by Mary

physics
A simple pendulum is made from a bob of mass 0.04 kg suspended on alight string of length 1.4m. Keeping the string taut, the pendulum is pulled to one side until it has gained a height of 0.1m. calculate: a. The total energy of the oscillation (b) the amplitude of the ...
Monday, January 16, 2012 at 6:53am by Nuwaya

physics
what is the formula to find..If the driving frequency is reduced slightly (but the driving amplitude remains the same), at what frequency will the amplitude of the mass's oscillation be half of the maximum amplitude?
Monday, March 26, 2012 at 9:06am by Anonymous

physics
A spring mass system mounted horizontally is allowed to oscillates in SHM with a mass of 600g attached to the free end of the spring. A force of 8 N causes 35 mm displacement of the spring. Find: a. free constant of the spring. b. angular frequency period and frequency of the ...
Friday, November 19, 2010 at 8:14am by Anonymous

Physics
In a head-on collision, a car stops in 0.14{\rm s} from a speed of 24{\rm m}/{\rm s} . The driver has a mass of 67{\rm kg} , and is, fortunately, tightly strapped into his seat. What force is applied to the driver by his seat belt during that fraction of a second?
Friday, October 5, 2012 at 11:00pm by Amanda

physics
frequency of oscillation does not depend on elongation.
Monday, November 16, 2009 at 6:07pm by bobpursley

science
How much does it cost to operate a 80-{\rm W} lamp continuously for a week if the power utility rate is 25 {\rm cents}/{\rm kWh}.
Wednesday, March 20, 2013 at 3:46pm by Anonymous

Science
Yes, but not often. See the following Wikipedia paragraph about that. The tropopause is not a "hard" boundary. Vigorous thunderstorms, for example, particularly those of tropical origin, will overshoot into the lower stratosphere and undergo a brief (hour-order or less) low-...
Sunday, December 16, 2012 at 11:47pm by drwls

physics
One end of a light spring with force constant 300 N/m is attached to a vertical wall. A light string is tied to the other end of the horizontal spring. The string changes from horizontal to vertical as it passes over a solid pulley of diameter 6.00 cm. The pulley is free to ...
Monday, November 30, 2009 at 6:10pm by caroline

physics
An oscillator consists of a block attached to a spring (k = 299 N/m). At some time t, the position (measured from the system's equilibrium location), velocity, and acceleration of the block are x = 0.0817 m, v = -16.9 m/s, and a = -108 m/s2. Calculate (a) the frequency (in Hz...
Monday, April 27, 2009 at 8:05pm by sweety

physics
An oscillator consists of a block attached to a spring (k = 299 N/m). At some time t, the position (measured from the system's equilibrium location), velocity, and acceleration of the block are x = 0.0817 m, v = -16.9 m/s, and a = -108 m/s2. Calculate (a) the frequency (in Hz...
Tuesday, April 28, 2009 at 10:17pm by sweety

physics
An oscillator consists of a block attached to a spring (k = 299 N/m). At some time t, the position (measured from the system's equilibrium location), velocity, and acceleration of the block are x = 0.0817 m, v = -16.9 m/s, and a = -108 m/s2. Calculate (a) the frequency (in Hz...
Friday, May 1, 2009 at 8:19am by chirayu

physics
An oscillator consists of a block attached to a spring (k = 299 N/m). At some time t, the position (measured from the system's equilibrium location), velocity, and acceleration of the block are x = 0.0817 m, v = -16.9 m/s, and a = -108 m/s2. Calculate (a) the frequency (in Hz...
Sunday, May 3, 2009 at 11:39pm by chirayu

chemistry
15.2 \rm g copper and 50.0 \rm g copper 11.2 \rm g gold and 14.9 \rm g gold
Wednesday, September 21, 2011 at 9:07pm by Anonymous

physic
A spring (80 {\rm N/m}) has an equilibrium length of 1.00 {\rm m}. The spring is compressed to a length of 0.50 {\rm m} and a mass of 2.1 {\rm kg} is placed at its free end on a frictionless slope which makes an angle of 41 ^\circ with respect to the horizontal. The spring is ...
Saturday, August 28, 2010 at 10:30am by fatiey

physic
A spring (80 {\rm N/m}) has an equilibrium length of 1.00 {\rm m}. The spring is compressed to a length of 0.50 {\rm m} and a mass of 2.1 {\rm kg} is placed at its free end on a frictionless slope which makes an angle of 41 ^\circ with respect to the horizontal. The spring is ...
Saturday, August 28, 2010 at 10:31am by fatiey

ph
A spring (70 {\rm N/m}) has an equilibrium length of 1.00 {\rm m}. The spring is compressed to a length of 0.50 {\rm m} and a mass of 2.1 {\rm kg} is placed at its free end on a frictionless slope which makes an angle of 41 ^\circ with respect to the horizontal. The spring is ...
Monday, November 1, 2010 at 8:55pm by Anonymous

ph
A spring (70 {\rm N/m}) has an equilibrium length of 1.00 {\rm m}. The spring is compressed to a length of 0.50 {\rm m} and a mass of 2.1 {\rm kg} is placed at its free end on a frictionless slope which makes an angle of 41 ^\circ with respect to the horizontal. The spring is ...
Monday, November 1, 2010 at 9:02pm by Anonymous

chemistry
Rank the following compounds in order of decreasing boiling point: sodium fluoride ( \rm NaF ), methane ( \rm CH_4 ), fluoromethane ( \rm CH_3F )
Sunday, August 21, 2011 at 5:03pm by nurul

physics
A parallel-plate capacitor is formed from two 1.0{\rm cm} \times 1.0{\rm cm} electrodes spaced 2.8{\rm mm} apart. The electric field strength inside the capacitor is 1.0\times10^{6}{N/C}} part a What is the charge (in {\rm nC}) on positive electrode? part b What is the charge...
Wednesday, June 19, 2013 at 6:25pm by holly

organic chemisrtry
For stretching, think of the H2 molecule as H---H. Now take your left hand on the left H and your right hand on the right H and stretch it like a rubber band. For bending, look at the H2O molecule. O--H | H There is a stretching frequency for the OH bands. But the H atoms rock...
Tuesday, September 4, 2012 at 9:16pm by DrBob222

college physics
An oscillator consists of a block attached to a spring (k = 299 N/m). At some time t, the position (measured from the system's equilibrium location), velocity, and acceleration of the block are x = 0.0817 m, v = -16.9 m/s, and a = -108 m/s2. Calculate (a) the frequency (in Hz...
Tuesday, April 28, 2009 at 11:57pm by nick

physics
At the instant the traffic light turns green, an automobile that has been waiting at an intersection starts ahead with a constant acceleration of 2.80{\rm m}/{\rm s}^{2} . At the same instant, a truck, traveling with a constant speed of 14.8{\rm m}/{\rm s} , overtakes and ...
Thursday, September 27, 2012 at 11:21pm by ali

Physics
A baseball is hit with a speed of 29.0{\rm m/s} at an angle of 44.0{\rm ^\circ} . It lands on the flat roof of a 10.0{\rm m} -tall nearby building. If the ball was hit when it was 1.4{\rm m} above the ground, what horizontal distance does it travel before it lands on the ...
Thursday, January 31, 2013 at 5:09pm by Anonymous

Chemisty
Calculate the \rm pH of a 0.10 M solution of hydrazine, \rm N_2H_4. K_b for hydrazine is 1.3\times 10^{-6}.
Friday, June 14, 2013 at 11:14pm by Karlie

physics
The balloon contains 0.30 {\rm mol} of helium starts at a pressure of 115 {\rm kPa} and rises to an altitude where the pressure is 55.0 {\rm kPa}, maintaining a constant 300 {\rm K} temperature. (A)By what factor does its volume increase? (B)How much work does the gas in the ...
Sunday, April 22, 2012 at 5:40am by George

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