# If the relative atomic mass of CH2O is calculated it's empirical formula (C=12,H=1,O=16)

46,086 questions, page 164
1. ## phy

A weightless string is suspend on a frictionless pulley, a mass of 6 kg. is suspend at one end and mass of 10 kg. is suspended on the other end of the string, the tension in the string will be :

asked by nimish on December 18, 2014
2. ## physics

'the mass of the Earth is approximately 80 times the mass of the moon and the earth's radius 3.7 times that of the moon. if the acceleration of free fall on the Earth is 10 ms2. estimate its value on the moon'

asked by Anonymous on January 19, 2011
3. ## Chemistry

This a back-titration problem, the equation is (mass/molar mass * na)+ (Ma * Va* na) = (Mb * Vb* nb. do the na and nb variables refer to the moles of the acid and base, or the moles of H and OH? acid and base acid and base

asked by Tucker on June 4, 2007
4. ## Physics

A dog, with a mass of 8.0 kg, is standing on a flatboat so that he is 26.8 m from the shore. He walks 8.6 m on the boat toward the shore and then stops. The boat has a mass of 36.0 kg. Assuming there is no friction between the boat and the water, how far

asked by Julia on March 27, 2012
5. ## Chemistry

A 2.00g sample of Fe3O4 is reacted with with 8.00g of O2 to produce Fe2O3. a) What mass of Fe2O3 will be produced? b) What mass of Fe2O3 will actually be produced if the percentage yield for reaction is 85% produced?

asked by Paul on August 12, 2014
6. ## Physics

On a frictionless, horizontal air table, puck A (with mass 0.25kg) is moving toward puck B (with mass 0.35kg), which is initially at rest.After the collision,puck A has a velocity of 0.12m/s to the left, and puck B has a velocity of 0.65m/s to the right.

asked by Zairah on May 20, 2019
7. ## Physics

Sitting on a horizontal track is a mass of 10kg. One end of the track is raised untill the mass just begins to slip. If the coeffieient of static friction is .4 what is the minimum angle at which the mass begins to slip? The component of force down the

asked by Jason on August 22, 2006
8. ## physics

In a football game, a receiver is standing still, having just caught a pass. Before he can move, a tackler, running at a velocity of +4.4 m/s, grabs him. The tackler holds onto the receiver, and the two move off together with a velocity of +2.9 m/s. The

asked by bam on November 6, 2013
9. ## physics

In a football game, a receiver is standing still, having just caught a pass. Before he can move, a tackler, running at a velocity of 4.5m/s, grabs him. The tackler holds onto the receiver, and and the two move off together with a velocity of 2.6m/s. The

asked by Natasha on March 12, 2012
10. ## physics

In a football game, a receiver is standing still, having just caught a pass. Before he can move, a tackler, running at a velocity of +4.9 m/s, grabs him. The tackler holds onto the receiver, and the two move off together with a velocity of +3.4 m/s. The

asked by chelsea on May 11, 2012
11. ## Physics Honors

Consider planet mass of 4.98 E 21 kilograms with a satellite orbitting it at distance of 3.11 E 6 meters from planet's center. Satellite has mass of 369 kilograms. How long (inseconds) does it take the satellite to make one complete orbit around planet. I

asked by Joan on March 11, 2008
12. ## science

How would i set these up? like what is the equations? # A tennis player hits a tennis ball with a force of 330 N, and it accelerates at the rate of 5,500 m/s2. What is the mass of the tennis ball? # Li is pedaling his bike with a force of 220 N. The

13. ## Physics

A bullet of mass 0.06kg is fired horizontally with a muzzle speed of 700 m/s into a pendulums hanging block of mass 2.0kg. The block and the bullet then move up a height, h, above the pendulums equilibrium position. What is the speed of the bullet/block

asked by Erin on March 15, 2012
14. ## PHYSICS

HELP. I need to understand this for a test tomorrow. THANKS Consider planet mass of 4.98 E 21 kilograms with a satellite orbitting it at distance of 3.11 E 6 meters from planet's center. Satellite has mass of 369 kilograms. How long (inseconds) does it

asked by Joan on March 11, 2008
15. ## Science

Two football players collide head-on in midair while chasing a pass. The first player has a 100 kg mass and an initial velocity of 4.00 m/s in the positive x direction, while the second player has a 130 kg mass and initial velocity of 3.30 m/s in the

asked by Anonymous on October 16, 2014
16. ## physics

What is the kinetic energy of each electron in a beam of electrons if the beam produces a diffraction pattern of a crystal which is similar to that of a beam of 1.00 eV neutrons? Note: The electron mass is 9.11 × 10–31kg; and the neutron mass is 1.67 ×

asked by Lacey on July 12, 2013
17. ## Biomechanics

Two ice skaters start out motionless in the center of an ice rink. They then push each other apart. The first skater (mass = 80 kg) moves to the right with a velocity of 2.5 m/s. The second skater (mass = 58 kg) moves to the left at some unknown speed. If

asked by Brendan on April 6, 2014
18. ## chem

Forty miles above the earth's surface the temperature is 250 K and the pressure is only 0.20 mm Hg. What is the density of air (in grams per liter) at this altitude? (Assume the molar mass of air is 28.96 g/mol.) PV=nRT n/V= molar desity= P/RT mass

asked by Helpme on March 30, 2007
19. ## physics

a grandfather clock is designed to have a pendulum which swings a mass at the end of the chain in a horizontal circular motion. the pendulum is designed to swing 7 degrees off of the vertical. the chain is 1.50 meters long and the maximum tension in the

asked by nick on October 9, 2016
20. ## economics

am i right? don't want to hand in wrong homework again, my mom will kill me A research firm calculated that students who attend University spend about $2,760 each in the local economy for a total of$50.45 million. In total, the impact of their spending on

asked by jill on May 22, 2013
21. ## Statistics

Hoping to lure more shoppers downtown, a city builds a new parking garage in the central business district. The city hopes that the parking revenues will pay for the garage. During a recent two month period (44 days), the city statistician calculated the

asked by Katie on November 10, 2013
22. ## Physics

You're an investigator for the National Transportation Safety Board, examining a subway accident in which a train going at 88 km/h collided with a slower train traveling in the same direction at 22 km/h . Your job is to determine the relative speed of the

asked by Megan on April 8, 2016
23. ## physics

Posted by michelle quendarsv on Saturday, November 20, 2010 at 5:26pm. Posted by michelle quendarsv on Saturday, November 20, 2010 at 3:55pm. if it takes 726 watts of power to move a mass 36 meters in 14 seeconds, what is the mass? i really need like, step

asked by michelle quendarsv on November 20, 2010
24. ## chemistry

I posted this question on April 16 and received lots of help..but need more.. thanks Use the following information to identify element A and come pound B, then answer questions a and b. An empty glass container has a mass of 658.572 g. It has a mass of

asked by Julia on April 18, 2007
25. ## S.S

what issues or events highlighted the insufficiency of the power of the central government under the Articles of Confederation? select all that apply. A the central government's inability to impose taxes on states*** B the law Congress created relative to

asked by need hel plz on September 28, 2017
26. ## physics

1.A 500.0 g mass is placed on a 20.0 cm cube of gelatin. The 500.0 g mass (a 5.00 cm diameter disk) depresses the gelatin 0.243 mm. What is Young's modulus for this gelatin? ____________N/m^2 Later, a 2.00 kg mass disk (5.00 cm in diameter) is placed on

asked by sand on December 4, 2011
27. ## physics

1.A 500.0 g mass is placed on a 20.0 cm cube of gelatin. The 500.0 g mass (a 5.00 cm diameter disk) depresses the gelatin 0.243 mm. What is Young's modulus for this gelatin? ____________N/m^2 Later, a 2.00 kg mass disk (5.00 cm in diameter) is placed on

asked by sand on December 5, 2011
28. ## physics

1.A 500.0 g mass is placed on a 20.0 cm cube of gelatin. The 500.0 g mass (a 5.00 cm diameter disk) depresses the gelatin 0.243 mm. What is Young's modulus for this gelatin? ____________N/m^2 Later, a 2.00 kg mass disk (5.00 cm in diameter) is placed on

asked by sand on December 5, 2011

Hi! I have to sketch 3D shape of the house using triangular prism, rectangular prisms, cube, and cylinder.I have to include measurement calculations with formulas. I already did it all, but someone told me that the SA (surface area) of my house calculated

asked by mark on May 19, 2013
30. ## Chemistry

The 1-D harmonic oscillator is a good approximation for the vibration of the bond between the atoms of a diatomic molecule. Using this treatment, predict the wavenumber in cm-1 required to vibrationally excite the HCl molecule, given that the force

asked by Austin on February 10, 2018
31. ## physics

A circular disk of mass 0.2kg and radius 33cm, initially not rotating, slips down a thin spindle onto a turntable (disk) of mass 1.7kg and the same radius, rotating freely at 4.4rad/s. a) Find the new angular velocity of the combination b) The change in

asked by kayla on December 6, 2017
32. ## calc: simpson's rule & arc length

i'm still getting this question wrong. please check for my errors: Use Simpson's Rule with n = 10 to estimate the arc length of the curve. y = tan x, 0

asked by COFFEE on June 13, 2007
33. ## FIN

Your directions seem to be clear -- except for which finance site you should reference. How would you like us to help you with this assignment? a quote for the Brady Corporation (you may need to use the Symbol lookup) and look at the company's "Profile".

asked by Ms. Sue on August 7, 2007
34. ## physics...plz help me

A cannon is pointed at a 60 degree angle relative to a flat, horizontal field. It fires a projectile with a muzzle speed of 1500 ft/s. Then the gunners change the angle to 30 degree, reload the cannon, and 5.0 seconds later, fire. What is the required

asked by mary on December 10, 2008
35. ## physics

A circular wire coil consists of 100 turns and is wound tightly around a very long iron cylinder with a radius of 2.5 cm and a relative permeability of 2200. The loop has a current of 7.5A in it. Determine the magnetic field strength produced by the coil

asked by Isabell on February 17, 2011
36. ## physics

Question 6) Oil and gas exploration companies find new underground deposits by measuring (with incredible precision) the value of g at the Earth's surface. EXTRA INFO GIVEN: The challenge: F=Gm1m2/r^2 ONLY works for two cases: point masses, or if one of

asked by katie bornia on October 22, 2016
37. ## Physics

Safety engineers estimate that an elevator can hold 20 persons of 65 kg average mass. The elevator itself has amass of 450 kg. Tensile strength tests show that the cable supporting the elevator can tolerate a maximum force of 2.94e4 N. What is the greatest

asked by Anonymous on September 19, 2007
38. ## Physics

A small car (mass 380 ) is pushing a large truck (mass 1000 ) due east on a level road. The car exerts a horizontal force of 1580 on the truck. What is the magnitude of the force that the truck exerts on the car?

asked by anonymous on July 28, 2012
39. ## chemistry

A particular air sample at 1 atm pressure has a density of approximately 1.3 g/liter and contains SO2 at a concentration of 25 µg/m3 . What is this concentration in terms of: a) Parts per million (mass SO2 per 106 units mass of air) b) Moles SO2 per 106

asked by Mensah on October 16, 2015
40. ## Physics

An object of mass M = 1,114 g is free to move along a horizontal, frictionless surface. This object is further connected to a second object with a mass of m = 811 g by means of a massless string that extends around a massless, frictionless pulley. Find the

asked by Lisa on October 10, 2009
41. ## physics

In a football game, a receiver is standing still, having just caught a pass. Before he can move, a tackler, running at a velocity of +3.62 m/s, grabs him. The tackler holds onto the receiver, and the two move off together with a velocity of +1.66 m/s. The

asked by ODU on July 8, 2013
42. ## physics

A bullet of mass 30 gms is fired into a wooden block with mass 15kg by mans of a spring.The wooden block hangs from the ceiling by a wire.If the bullet and the block rise 0.50 m and the spring constant is 2000N/m. calculate the compression of the spring.

asked by Anonymous on June 18, 2012
43. ## Physics

Jake has a mass of 88.0 kg and is zooming along in a 110.0-kg bumper car at 9.4 m/s. He bumped Allen's car, which is sitting at rest. Allen has a mass of 88.0 kg. After the elastic collision, Jake continues ahead with a speed of 3.2 m/s. How fast is

asked by Ian on March 18, 2013
44. ## math

Two planes leave simultaneously from Chicago's O'Hare Airport, one flying due north and the other due east (see figure). The northbound plane is flying 50 miles per hour faster than the eastbound plane. After 3 hours the planes are 2840 miles apart. Find

asked by Anonymous on February 7, 2019
45. ## Chemistry

Hi I need help with these following questions. I have all of the data needed. Calculate the enthalpy change of the reaction for each trial (in kJ) 3. Calculate the heat released by the reaction for each trial (in J): 2. Calculate the heat absorbed by the

asked by Matt on November 17, 2013
46. ## Science

2.1 Two blocks of mass M kg and 2.5kg respectively are connected by a light, inextensible string. The string runs over a light, frictionless pulley ,The blocks are stationary 2.1.1 calculate the tension in a string The coefficient of static friction

asked by Pamela on February 6, 2019
47. ## physics.

: When the mass hits the pile, it has kinetic energy. This energy is transformed into other forms of energy as the speed of the falling mass rapidly reduces to zero. As this happens, the pile is forced a small distance into the ground. question: Explain

asked by Richard on January 10, 2010
48. ## physics

A solid block of mass m2 = 1.0 $kg$, at rest on a horizontal frictionless surface, is connected to a relaxed spring (with spring constant k = 260 N/m whose other end is fixed. Another solid block of mass m1 = 2.4 kg and speed v1 = 3.3 m/s collides with the

asked by Tay on March 21, 2014
49. ## CHEMISTRY MOLALITY!!!!!

A bottle of wine contains 13.1% ethanol by volume. The density of ethanol (C2H5OH) is 0.789 g/cm3. Calculate the concentration of ethanol in wine in terms of mass percent and molality. i don't know how to get molality. please help!!!! Molality is the

asked by Anonymous on March 31, 2007
50. ## chemistry

A is a solution containing 0.095 mol/dm3 of trioxonirate(v) acid solution. B contains 13.5g if X2 CO3 1OH2 per dm3. using the table above as the reading from your titration, calculation. 1. concentration of B in mol/dm3. 2. molar mass of X2 CO3 1OH20. 3.

asked by poppy👌🤔 on May 5, 2019
51. ## physics

A block of ice at 0°C whose mass initially is m = 48.4 kg slides along a horizontal surface, starting at a speed vo = 4.91 m/s and finally coming to rest after traveling a distance d = 12.28 m. Compute the mass of ice melted as a result of the friction

asked by anonymous on April 15, 2012
52. ## physics

In a playground there is a small merry-go-round of radius 1.40 m and mass 140 kg. The radius of gyration is 0.960 m. A child of mass 43.0 kg runs at a speed of 3.70 m/s tangent to the rim of the merry-go-round while it is at rest, and then jumps on. Find

asked by Help!:) on May 6, 2013
53. ## physics 2, help please

Two masses (mA= 2 kg, mB= 4 kg) are attached to a (massless) meter stick, at the 0 and 75 cm marks, respectively. c.) Now, if mass B was removed, how much force would need to be exerted at the 100 cm mark in order to keep the meter stick level*? ? N d.)

asked by kelsey on October 23, 2008
54. ## Algebra

While traveling in a car, the centrifugal force a passenger experiences as the car drives in a circle varies jointly as the mass of the passenger and the square of the speed of the car. If the a passenger experiences a force of 100.8 newtons when the car

asked by Anonymous on March 16, 2010
55. ## Writing

Expository writing prompt: Describe a family celebration that has special meaning for you. Please give me some feedback. Every year my uncle celebrates Christmas at his house. Unlike the common Christmas party where people hand out presents to other

asked by Tiffany on September 18, 2017
56. ## Concentration increase

Question: What would happen to the Rf values of the pigments if you were to increase the relative concntration of acetone in the developing solvent? Note: The development solvent used was 70% hexane - 30% acetone. My answer: Acetone is more polar than

asked by Sheryl on October 22, 2006
57. ## Physics

A dirt biker races up a 15° incline and then takes off in an attempt to clear an obstacle. The end of the ramp is 3 m off the ground. A 4-m high obstacle is located 20 m from the base of the ramp. What minimum take-off speed is required for the daredevil

asked by Anonymous on January 28, 2014
58. ## physics

(a) 2.0 kg of molten copper at its melting point of 1083 ºC (the copper is 100% liquid) is poured into a mold in a cooling water bath at 20 ºC. What mass of water is needed to bring the solidified copper and water to an equilibrium temperature of 30 ºC,

asked by nicole on December 11, 2006
59. ## Chemistry 20

a) If the pressure and volume of a gas both increase, will the temperature increase or decrease? b) If the pressure is doubled and the volume is tripled, by what factor must the temperature increase or decrease? c) If the pressure of the gas is decreased

asked by R on November 6, 2010
60. ## Physics

The drawing shows two crates that are connected by a steel (Young's modulus 2.0 x 1011 N/m2) wire that passes over a pulley. The unstretched length of the wire is 1.8 m, and its cross-sectional area is 1.4 x 10-5 m2. The pulley is frictionless and

asked by Taylor on October 26, 2013
61. ## Maths

Please help!!! The mass of a particular substance is known to grow exponentially at a rate of 1.5% per day. Its initial mass was 230 grams and, after t days, it weighed 325 grams. The equation modelling this growth is 230×1.015 t  =  325. Use

asked by Sue on August 14, 2010
62. ## physics

Two skaters collide an embrace, in a completely inelastic collision. That is, they stick together after impact. The origin is placed at the point of collision. Alfred, whose mass is 83 kg, is originally moving east with speed 6.2 km/h. Barbara, whose mass

asked by Ryan on November 3, 2017
63. ## Physics

A solid ball and a hollow ball, each with a mass of 2 kg and radius of 0.1 m, start from rest and roll down a ramp of length 3 m at an incline of 44°. An ice cube of the same mass slides without friction down the same ramp. What is the speed of the ice

asked by Maria on June 19, 2012
64. ## physics

Two skaters collide an embrace, in a completely inelastic collision. That is, they stick together after impact. The origin is placed at the point of collision. Alfred, whose mass is 83 kg, is originally moving east with speed 6.2 km/h. Barbara, whose mass

asked by Darlene on November 2, 2017
65. ## Physics

At a given temperature, what relationship appears to exist between a gas particle's mass and it speed? How does graph change as particle mass increase? Isra fills two identical balloons at identical temperatures. She fills one with O2 gas and the other

asked by Alfrieda on July 19, 2012
66. ## 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?

asked by nurul on July 28, 2012
67. ## Science

What is the mass of 10cc of aluminum? Mass= volume*density. You need to look up the density of aluminum.

asked by Marley on November 7, 2006
68. ## chemistry

a mixture of NaCl and NaBr has a mass of 2.06 g and is found to contain 0.75 g of na what is the mass of NaBr in the mixture ?

asked by Anonymous on July 26, 2012
69. ## chemistry

The mass of the tin produced is 0.71 grams What is the theoretical mass of tin that should have been produced?

asked by Rendier on April 18, 2008
70. ## Physics

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 period?

asked by Amber on March 1, 2012
71. ## PHYSICS

Both car A and car B leave school at the same time, traveling in the same direction. Car A travels at a constant speed of 79 km/h, while car B travels at a constant speed of 89 km/h. How far is Car A from school 1.6 h later? Answer in units of km IT'S NOT

asked by naia on September 13, 2011
72. ## science

Harry walks 1.5 km/h to the mall. Earl walks 2.75 km/h to the mall. What is Earl's relative velocity with respect to Harry?

asked by chelsie on January 11, 2011
73. ## physics

a person standing on a moving escalator is moving relative to another person standing on the escalator true or false?

asked by Anonymous on October 14, 2012
74. ## science

Harry walks 1.5 km/h to the mall. Earl walks 2.75 km/h to the mall. What is Earl's relative velocity with respect to Harry?

asked by chelsie on January 11, 2011
75. ## Physic

Calculate the mass m needed in order to suspend the leg shown in the figure(Figure 1) . Assume the leg (with cast) has a mass of 15.5kg , and its CG is 35.5cm from the hip joint; the sling is 76.5cm from the hip joint.

asked by Charles on March 29, 2014
76. ## physics

the small body of mass m slides on a frictionless loop the height above the bottom path of the circular loop is three times the radius of the circular loop.DETERMINE THE VELOCITY OF THE MASS BEFORE IT REACHES TH BOTTOM PATH OF THE LOOP

asked by ERIC on November 16, 2010
77. ## physics

A man of mass 61.6 kg stands on a scaffold supported by a vertical rope at each end. The scaffold has a mass of 15.9 kg and is 2.0 m long. Suppose the man stands to the right from the middle of the scaffold that is a distance one sixth of the length of the

asked by Bronson on November 18, 2010
78. ## physic angular momentum and torque

Calculate the mass m needed in order to suspend the leg shown in the figure(Figure 1) . Assume the leg (with cast) has a mass of 15.5kg , and its CG is 35.5cm from the hip joint; the sling is 76.5cm from the hip joint.

asked by Jenna on March 29, 2014
79. ## physics

A student is thrown in a lake by his teacher, the student has a mass of 70 kg and a volume of 80,000 cm^3. Would the student sink or float? What is the net force on the student? What is the density of an object that has a mass of 2000 kg and a volume of

asked by John on July 14, 2015
80. ## physics

A man of mass 67.1 kg stands on a scaffold supported by a vertical rope at each end. The scaffold has a mass of 24.6 kg and is 3.6 m long. Suppose the man stands to the right from the middle of the scaffold that is a distance one sixth of the length of the

asked by ruth on November 15, 2011
81. ## physics

A man of mass 64.5 kg stands on a scaffold supported by a vertical rope at each end. The scaffold has a mass of 24.3 kg and is 3.6 m long. Suppose the man stands to the right from the middle of the scaffold that is a distance one sixth of the length of the

asked by Sara on October 12, 2008
82. ## physics (Newton's law of gravitation)

Can anyone please help me with this question? I am really confused. A neutron star and a black hole are 2.400e+12 m from each other at a certain point in their orbit. The neutron star has a mass of 2.78×1030 kg and the black hole has a mass of 9.94×1030

asked by Kathy on April 21, 2013
83. ## Physics

A man of mass 69.5 kg stands on a scaffold supported by a vertical rope at each end. The scaffold has a mass of 22.3 kg and is 2.4 m long. Suppose the man stands to the right from the middle of the scaffold that is a distance one sixth of the length of the

asked by Anonymous on October 11, 2008
84. ## Physics

A man of mass 64.8 kg stands on a scaffold supported by a vertical rope at each end. The scaffold has a mass of 16.8 kg and is 3.9 m long. Suppose the man stands to the right from the middle of the scaffold that is a distance one sixth of the length of the

asked by Bella on November 15, 2010
85. ## Physics

A man of mass 64.8 kg stands on a scaffold supported by a vertical rope at each end. The scaffold has a mass of 16.8 kg and is 3.9 m long. Suppose the man stands to the right from the middle of the scaffold that is a distance one sixth of the length of the

asked by Bella on November 15, 2010
86. ## physics

A man of mass 75.9 kg stands on a scaffold supported by a vertical rope at each end. The scaffold has a mass of 19.8 kg and is 2.8 m long. Suppose the man stands to the right from the middle of the scaffold that is a distance one sixth of the length of the

asked by Anonymous on October 22, 2008
87. ## Physics

A man of mass 65.2 kg stands on a scaffold supported by a vertical rope at each end. The scaffold has a mass of 22.7 kg and is 2.4 m long. Suppose the man stands to the right from the middle of the scaffold that is a distance one sixth of the length of the

asked by Mike on November 13, 2010
88. ## physics

A projectile (mass = 0.269 kg) is fired at and embeds itself in a target (mass = 1.34 kg). (The target is initially stationary). The target (with the projectile in it) flies off after being struck. What percentage of the projectile's incident kinetic

asked by chris on October 16, 2008
89. ## Algebra

When a ball is thrown up into the air, it makes the shape of a parabola. The equation S= -10t^2 + v*t + k gives the height of the ball at any time, t in seconds, where “v” is the initial velocity (speed) in meters/sec and “k” is the initial height

asked by Martha on February 19, 2010
90. ## statistics

When using the normal approximation to the binomial, what is the standard deviation used in the standardization formula when approximating a binomial distribution with 226 trials and p=0.25? Please submit your answer with 4 decimal places

asked by chandler on July 10, 2014
91. ## Math

A carpet is thrown upwards and its height h metres after t seconds is given by the formula h=35r-5r^2. How long does it take to reach a height of 50m? Explain the meaning of the double answer

asked by Blissful on January 23, 2018
92. ## Math Analysis

5. The bacteria population doubles every 10 hours. How long will it take to triple the initial amount? (Use log 3 / log 2 = 1.585) ==> I thought you could use the formula A(1/2)^(t/h), but I don't know... Any help is GREATLY appreciated!! :D

asked by Emily on November 16, 2009
93. ## chemistry

I have the same question as Chopsticks determine the emperical formula of the compound 25.3%copper, 12.9%sulphur, 25.7% oxygen, 36.1% water Can the answer be CuSO4(H2O)5? or does it have to be CuSO4 x 5H2O thanks in advance.

asked by sh on January 16, 2009
94. ## Organic Chemistry

cyclohexane=1.4264 toluene=1.4967 at 20˚C Mixture=1.4563 at 20˚C Assuming that the relationship between refractive index and concentration is linear, calculate the composition of the mixture. What do I do? Formula?

asked by Lauren on September 19, 2012
95. ## chemistry

Write the formula unit, total ionic, and net ionic equation for the precipitation reaction in a beaker after Al(ClO4)3, Rb2S, and CsI salts are added. Please help!

asked by Emily on November 7, 2011
96. ## Physics

The liquid in the tube has a density of 1.48 g/cm^3 . The atmospheric pressure is 1.013 X 10^5 newtons per square meter. What is the pressure P in the container? Please walk me through your steps, don't just suggest a formula. Thank you very much.

asked by Jen on June 11, 2012
97. ## physics

Mary weighs 450 N and she walks down a flight of stairs to a level 4.50 m below her starting point. What is the change in Mary's potential energy? 1 J whats the PE formula? and setup?

asked by Amelia on May 10, 2012
98. ## Math

3 tbsp. of extract are mixed with 250 ml. of oral suspension base. What is the final concentration of the suspension? I request the proper formula to figure out how to work this problem. Thank you.

asked by Denyse on August 19, 2012
99. ## Math

Using the term structure in Problem 29 what is the present value of an investment that pays \$100 at the end of each of years 1., 2. and 3? If you wanted to value this investment correctly using the annuity formula which discount rate should you use?

asked by J on June 7, 2014
100. ## Math

The dome over the town hall has a parabolic shape. I measure 48 m across and rises 12 m at its center. Determine the quadratic equation that models the shape of the parabola. I have learned the formula y = a(x-s)(x-t).

asked by Becca on August 1, 2018