Saturday
December 3, 2016

# Posts by tanner

Total # Posts: 68

Physics
A motor takes 5 s to go from 30 rad/s to 130 rad/s at constant angular acceleration. The total angle through which its shaft turns during this time is... A. 400 rad B. 320 rad C. 640 rad D. 800 rad E. 1600 rad F. None of the above
November 10, 2016

physics
A baseball thrown at an angle of 45 degrees above the horizontal strikes a building 18 m away at a point 8 m above the point it is thrown. Find the time taken by the ball to hit the building. Please show me how to set the problem up.
September 27, 2016

Math
-4 - x = -5
May 13, 2016

Calculus
Find constants a and b in the function ax^b/ln(x) such that f(1/5)=1 and there is a local min at x=1/5
October 20, 2015

Chemistry
A gas is confined to a cylinder under constant atmospheric pressure, as illustrated in the following figure. When the gas undergoes a particular chemical reaction, it absorbs 827 J of heat from its surroundings and has 0.66 kJ of P−V work done on it by its surroundings. ...
October 14, 2015

Finance
Company is planning to buy a machinery at a cost of \$20 million. This machine will be used for 10 years. The machine will bring additional revenue as follows: \$10 million for first 6 years and \$7 million for the last 4 years Expenses = 60% of revenue for all 10 years After 10 ...
June 27, 2015

English
After Victor recovers from the first of the several emotional and physical breakdowns, he is feeling much better and enjoying the fine spring weather in Ingolstadt. However, he receives a letter from Geneva that A. tells him that Elizabeth has decided to marry another man, ...
May 28, 2015

Math
19>-n/5+9
February 24, 2015

Physics
A 18.6 kg monkey hangs from a cord suspended from the ceiling of an elevator. The cord can withstand a tension of 202 N and breaks as the elevator accelerates. What was the elevator's minimum acceleration? (in m/s^2)
February 11, 2015

Physics
If a curve with a radius of 91.5 m is perfectly banked for a car traveling 77.4 km/h, what must be the coefficient of static friction for a car not to skid when traveling at 91.6 km/h?
February 11, 2015

Physics
How many revolutions per minute would a 15.6 m diameter Ferris wheel need to make for the passengers to feel "weightless" at the topmost point? Do not enter unit.
February 11, 2015

Physics
At what minimum speed must a roller coaster be traveling when upside down at the top of a circle so that the passengers will not fall out? Assume a radius of curvature of 8.47 m. (in m/s)
February 11, 2015

Physics
A projectile is launched with an initial speed V0. At its highest point, the projectile's speed is V0/2 . What was the launch angle above the horizontal? (in deg)
February 1, 2015

Physics
Eddie the Eagle, British Olympic ski jumper, is attempting his most mediocre jump yet. After leaving the end of the ski ramp, he lands downhill at a point that is displaced 62.2 m horizontally from the edge of the ramp. His velocity just before landing is 29.0 m/s and points ...
February 1, 2015

Physics
A golfer, standing on a fairway, hits a shot to a green that is elevated 5.50 m above the point where she is standing. The ball leaves her club at an angle of 37.0° above the ground, with a speed of 31.1 m/s. Find the time that the ball is in the air before it hits the ...
February 1, 2015

Physics
What is the y-component of a vector in the x-y plane whose magnitude is 87.8 and whose x-component is 64.9?
January 21, 2015

physics
A football is kicked at ground level with a speed of 15.4 m/s at an angle of 34.7° to the horizontal. How much later does it hit the ground? (in s)
January 21, 2015

Physics
Romeo is chucking pebbles gently up to Juliet's window and he wants the pebbles to hit the window with only a horizontal component of velocity (the least possible speed). He is standing at the edge of a rose garden at H = 4.62 m below her window and at D = 5.21 m from the ...
January 21, 2015

pre calculus
Use Hooke's Law for springs, which states that the distance a spring is stretched (or compressed) varies directly as the force on the spring. A force of 265 newtons stretches a spring 0.15 meter. (a) What force is required to stretch the spring 0.2 meter? (Round your ...
October 2, 2014

Math
The length of a rectangular board is 10 cm longer than its width. The width of the board is 26 cm. the board is cut into 9 equal pieces. What is the area of each piece? What are the possible dimensions of each piece?
October 1, 2014

English
Come up with a thesis statement which could be supported by 3 points using: humans and greed.
September 3, 2014

BIOLOGY
No its not, the answer is C: Haploid, and are made when haploid spores undergo mitosis.
March 5, 2014

chemistry
First you need to find the limited reactant. You do this by dividing the 2.0 g of NaSO4 by it's molar mass as well as the 2.0 g of Calcium Sulfate dihyrdate (CaCl2 + 2H20) You'll find that the Calcium sulfate is the limited reactant. From there you Take the moles of ...
October 21, 2013

English
Hypercritical
September 1, 2013

Chemistry
A solution of H2SO4(aq) with a molal concentration of 1.66 m has a density of 1.104 g/mL. What is the molar concentration of this solution?
April 29, 2013

Chemistry
A solution is made by dissolving 0.624 mol of nonelectrolyte solute in 795 g of benzene. Calculate the freezing point and boiling point of the solution. Tf=_ˆC Tb=_ˆC
April 29, 2013

math
Explain why 61 degrees
April 11, 2013

math
If the temperature at 10 o'clock is 46 degrees ,at noon it is 54 degrees, 2 o'clock it is 62 degrees, at 6 o'clock it is 60 degrees what would the temperature at 4 o'clock be
April 11, 2013

Math
February 11, 2013

Physics
A sports car moving at constant speed travels 150 meters in 5.4 seconds , then brakes and comes to a stop in 3.9 seconds What is the magnitude of its acceleration in ? What is the magnitude of its acceleration in g's (g= 9.80 m/s^2 )?
January 20, 2013

nutrition and wellness
January 16, 2013

Chemistry
You are planning an experiment that requires 0.0610 mol of nitrogen monoxide gas (NO). What volume would you need at STP? Answer in units of L
December 7, 2012

Math
the common denominator for all of the fractions would be six. as long as you multiply or divide the top and the bottom with the same number you do not break any math rules. 2/3=(2*2)/(3*2)=4/6 1/2=(1*3)/(2*3)=3/6 4/12=(4/2)/(12/2)=2/6 and 5/6=5/6 order the common fractions ...
November 26, 2012

math
y'=2x-1 y'=0 when x is .5 at (.5,-.25) you have a local and global minimum. the global maximum would be infinity because the function is continuous on all real x and the parabola opens up.
November 26, 2012

math
A 100/(1+9*1)=10 b lim as t->infinity is 100 c the growth rate at time 0 is 9
November 26, 2012

chemistry
What pressure would be required for neon at 25 degrees C to have the same density as argon at 25 degress C and 1.00 atm?
November 5, 2012

chemistry
What pressure would be required for neon at 25 degrees C to have the same density as argon at 25 degress C and 1.00 atm?
November 5, 2012

chemistry
What pressure would be required for neon at 25 degrees C to have the same density as argon at 25 degress C and 1.00 atm?
November 5, 2012

Physics
Two spherical objects with a mass of 2.88 kg each are placed at a distance of 2.12 m apart. How many electrons need to leave each object so that the net force between them becomes zero?
June 7, 2012

Physics
Vector A has magnitude 37 units and direction, counterclockwise from east, of 12.9 degrees. What is the value of its x component to 1 decimal place?
May 12, 2012

chemistry
Both Fe2+ and Cd2+ are precipitated by sulfide. However, they can be quantitatively separated through pH adjustment. You are given a solution containing 0.086 M Fe2+ and 0.062 M Cd2+. Calculate the [H+] range for a saturated H2S solution (ie, [H2S]=0.10 M) in which at least 99...
March 25, 2012

chemistry
Calculate the pH range required to separate 99.99% of Cr3+ from Zn2+ by precipitation of Cr(OH)3(s) in a solution that is initially 0.034 M in both Cr3+ and Zn2+. Use the Ksp values from Table 16.2 of Chang and calculate the pH to the nearest 0.01 pH unit. Lowest pH= Highest pH=
March 25, 2012

chemistry
i figured it out but how do i get the Low end and High end?
March 25, 2012

chemistry
The solubility products of AgBr and Ag3PO4 are 5.0 10-13 and 1.8 10-18, respectively. If Ag+ is added (without changing the volume) to 1.00 L of a solution containing 0.31 mol Br ‾ and 0.31 mol PO43-, calculate the molarity of Ag+ ions required to initiate precipitation ...
March 25, 2012

Chemistry
well that's the ksp they gave in the question
March 25, 2012

Chemistry
use the Ksp of SnS2= 1.0X10^-70 and calculate the pH of a hydrogen sulfide solution needed to precipitate 99.99% of the tin(IV) ion assuming [Sn^4+]=0.05M and that [H2S]=0.10M.
March 25, 2012

chemistry
If 29.0 mL of 0.10 M Ba(NO3)2 are added to 76.0 mL of 0.21 M Na2CO3, will BaCO3 precipitate? Calculate Q
March 5, 2012

Chemistry
A solution containing Pb2+ and a solution containing IO3- are poured together and quickly mixed. After mixing, the solution contains 0.0030 M Pb2+ and 0.040 M IO3-. Immediately Pb(IO3)2(s), which has Ksp=2.510-13, begins to precipitate. Calculate the free concentrations of Pb2...
March 5, 2012

Chemistry
What concentration of chloride ion is required to precipitate 99.9% of the lead ion from a solution with [Pb^2+]= 0.045 mol/L ?
March 4, 2012

Chemisty
Let's explore the efficiency of chloride ion precipitation in seperating Ag^+ from Pb^2+ in a solution. Suppose that [Pb^2+]= 0.045 mol/L and [Ag^+]= 0.084 mol/L. Calculate the chloride ion concentraion required to just start precipitation of Pb^2+ ion and then calculate ...
March 4, 2012

chemistry
A container is charged with hydrogen, nitrogen, and ammonia gases at 120°C and the system was allowed to reach equilibrium. What will happen if the volume of the container is increased at constant temperature? 3H2(g) + N2(g) 2 NH3(g)
February 27, 2012

Chemistry
Consider the following equilibrium reaction: NaHCO3(s) Na2CO3(s) + H2O(g) + CO2(g) When 100 g of sodium hydrogen carbonate are added to a reaction vessel, the temperature is increased to 200°C, and the system comes to equilibrium. What happens to the partial pressure of ...
February 27, 2012

Geometry
what are the 2 lengths on top and bottom of plot 1, and what is the length on plot 3. with the following info I can answer
February 27, 2012

social studies
The Nubians worshipped only one god
November 6, 2011

social studies
Nubia was a kingdom to the south of egypt true or false
November 6, 2011

Chemistry HEAT OF FUSION
What amount of energy is required to melt a 26.9 g piece of ice at 0oC? The heat of fusion of ice = 333 Jg-1 Heat required to melt the ice = J What amount of energy must be removed from 120 g of water to cool it from 72.1oC to 12.4oC? Specific heat of water = 4.184 JK-1g-1 ...
October 6, 2011

Chemistry HEAT OF FUSION
What is the final temperature, in oC, after a 15.0 g piece of ice, at 0oC, is placed in a styrofoam cup with 128 g of water initially at 74.0oC. Assume there is no transfer of heat to or from the surroundings. The specific heat of water = 4.184 JK-1g-1 The heat of fusion of ...
October 6, 2011

Chemistry
Ethanol (C2H5OH) boils at a temperature of 78.3oC. What amount of energy, in joules, is necessary to heat to boiling and then completely vaporize a 22.8 g sample of ethanol initially at a temperature of 16.5oC. The specific heat of ethanol is approximately constant at 2.44 JK-...
October 6, 2011

You have been retained to analyze how many check-in agents should be used at a check-in counter for a large hotel. During normal business hours, customers arrive at a rate of about 24 per hour, and it takes about 7 minutes to complete the check-in process. Both the poisson ...
May 14, 2011

Chemistry
you have to know the initial grams before starting. its not given I have the same question and I can't do it
May 5, 2011

physics
A wave of amplitude 0.37 m interferes with a second wave of amplitude 0.18 m is traveling in the same direction. What is the largest resultant amplitude that can occur?
January 16, 2011

Math
About 3/4 of the track team are girls. About 3/4 of these girls are in 8 th grade. What fraction of th e students are grade 8 girls? 1/3?
November 14, 2010

Algabra
What is 2/5 of 6?
October 4, 2010

physics
: A 50kg wooden crate rests on a horizontal concrete floor. The coefficient of friction is u=0.7. What is the magnitude of the frictional force?
September 15, 2010

Schindler's List Essay
this is garbage
May 8, 2010

english