Thursday

July 2, 2015

July 2, 2015

Total # Posts: 2,229

**chemistry**

How many minutes are needed to plate out 29.00g Mg from molten MgCl2, using 2.70A of current?
*April 29, 2014*

**PHYSICS**

A point source of a wave emits 195 watts. What is the intensity at a distance of 4.56 meters? I =
*April 21, 2014*

**Ollu**

On a steamy mirror wipe away just enough to see your full face. How tall will the wiped are be compared with the vertical dimension of your face?
*April 20, 2014*

**Chemistry**

(7.82088 * 0.08206 * 299.4)/ 1.03882 = 184.969 184.969 / 0.21 = 880.804 You are correct, I calculated it but forgot to write it in.
*April 17, 2014*

**Chemistry**

Ethanol will combust according to the following equation: C2H5OH(l)+3O2(g)->2CO2(g)+3H2O(l) How many liters of air are required to combust 120.1 g of ethanol at 26.4C and 789.5 mmHg. Assume air is 21% O2 by volume. I cannot find my error - professor states answer as 882.6...
*April 17, 2014*

**Chem **

Write the balanced overall reaction from these unbalanced half-reactions ln--->ln^3+ Cd^2+--->Cd
*April 17, 2014*

**science**

Alfredo, who has a mass of 60 kilograms, jumped off a retaining wall. His kinetic energy when he landed on the ground was 822 joules. How high was the wall?
*April 16, 2014*

**physics**

The velocity of a simple harmonic oscillator is given by; v = + 6.92*sin(10.5*t) (mks units) What is its angular frequency? omega = What is the amplitude of the motion? A = Where is the mass at the time t = 86.08 seconds? x = If the mass is 0.53 kg, what is the spring's ...
*April 14, 2014*

**History**

Have you looked up Freemasons?
*April 9, 2014*

**Physics**

In the device a 50g mass is hung from a pulley and released. A disk is placed on the platform. The platform has a radius of 5cm. The disk and platform go from rest to an angular velocity of 8.5rad/s in 2.5 seconds. What is the moment of inertia of the disk? What is its mass? ...
*April 6, 2014*

**Physics**

A 215-kg load is hung on a wire of length of 3.50 m, cross-sectional area 2.000x10^-5 m2, and Young's modulus 8.00x 10^10 N/m2. What is its increase in length?
*April 5, 2014*

**Physics**

One end of a uniform 3.20-m-long rod of weight Fg is supported by a cable at an angle of θ = 37° with the rod. The other end rests against the wall, where it is held by friction as shown in the figure below. The coefficient of static friction between the wall and the...
*April 5, 2014*

**Physics**

Consider the following distribution of objects: a 4.00-kg object with its center of gravity at (0, 0) m, a 1.20-kg object at (0, 3.00) m, and a 5.40-kg object at (2.00, 0) m. Where should a fourth object of mass 7.00 kg be placed so that the center of gravity of the four-...
*April 3, 2014*

**Physics**

x10^2N*
*April 3, 2014*

**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*

**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*

**Physics**

Consider the following distribution of objects: a 4.00-kg object with its center of gravity at (0, 0) m, a 1.20-kg object at (0, 3.00) m, and a 5.40-kg object at (2.00, 0) m. Where should a fourth object of mass 7.00 kg be placed so that the center of gravity of the four-...
*April 2, 2014*

**Physics**

Consider the following distribution of objects: a 4.00-kg object with its center of gravity at (0, 0) m, a 1.20-kg object at (0, 3.00) m, and a 5.40-kg object at (2.00, 0) m. Where should a fourth object of mass 7.00 kg be placed so that the center of gravity of the four-...
*April 2, 2014*

**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*

**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*

**Physics**

Consider the following distribution of objects: a 4.00-kg object with its center of gravity at (0, 0) m, a 1.20-kg object at (0, 3.00) m, and a 5.40-kg object at (2.00, 0) m. Where should a fourth object of mass 7.00 kg be placed so that the center of gravity of the four-...
*April 1, 2014*

**physics**

A ladder can fall for two reasons. If it is set too steep and the climber gets their mass to the left of the ladder's base, the ladder likely will fall over backwards. If the ladder is set at too shallow of an angle the required force of friction between the ladder and ...
*March 31, 2014*

**math**

what is the total amount of 50.00 with 8.75% sales tax added
*March 31, 2014*

**geometry**

Two buildings are separated by an alley. Joe is looking out of a window 60 feet above the ground in one building. He observes the measurement of the angle of depression of the base of the second building to be 50 degrees and the angle of elevation of the top to be 40 degrees. ...
*March 27, 2014*

**math help**

Wolfram Alpha ^_^
*March 27, 2014*

**math**

Which type of graph would best display the numbers of each type of vehicle sold by a large dealership during a year? A. bar graph B. circle graph C. line graph D. line plot
*March 25, 2014*

**Chemistry**

What can be said about the presence of each of these groups of cations in the orginial solution
*March 25, 2014*

**Chemistry 2**

CALCULATE THE SOLUBILITY OF CuBr in 0.69 M NH3
*March 25, 2014*

**Chemistry 2**

What is the solubility of silver chromate in pure water
*March 25, 2014*

**Chemistry**

The Ksp of manganese (II) hydroxide, Mn(OH)2 is 2.00x10^-13. Calculate the solubility of this compound in g/L?
*March 25, 2014*

**how to do 18 x 4 using expanded agrothihim**

18 x 4....... i do not know
*March 24, 2014*

**math**

A state fair had 1,019,887 people in attendance. The fair committee performed a survey. The question was, “What do fairgoers enjoy most about the fair?”&...
*March 21, 2014*

**physics**

A potter's wheel is rotating around a vertical axis through its center at a frequency of 1.8rev/s . The wheel can be considered a uniform disk of mass 4.7kg and diameter 0.34m . The potter then throws a 3.1kg chunk of clay, approximately shaped as a flat disk of radius ...
*March 17, 2014*

**PHYSICS**

A 0.380 kg pendulum bob passes through the lowest part of its path at a speed of 2.03 m/s. What is the tension in the pendulum cable at this point if the pendulum is 83.1 cm long? When the pendulum reaches its highest point, what angle does the cable make with the vertical? ...
*March 16, 2014*

**Physics**

i cant seem to find the error but i still cant get the correct answer
*March 12, 2014*

**Physics**

A car of mass m moving at a speed v1 collides and couples with the back of a truck of mass 3m moving initially in the same direction as the car at a lower speed v2. (Use any variable or symbol stated above as necessary.) (b) What is the change in kinetic energy of the car&#...
*March 12, 2014*

**Physics**

A car of mass m moving at a speed v1 collides and couples with the back of a truck of mass 3m moving initially in the same direction as the car at a lower speed v2. (Use any variable or symbol stated above as necessary.) (b) What is the change in kinetic energy of the car&#...
*March 10, 2014*

**Chem **

if 0.24o moles of a monoprotic weak acid is titrated with NaOH, what is the PH of the solution at the 1/2 equivalence point.
*March 10, 2014*

**Chem**

500.0 Ml of 0.160 M NaOH is added to 565 ml of 0.250 M weak acid. Ka=2.46x10^-5. What is the pH of the resulting buffer
*March 10, 2014*

**Physics**

A car of mass m moving at a speed v1 collides and couples with the back of a truck of mass 3m moving initially in the same direction as the car at a lower speed v2. (Use any variable or symbol stated above as necessary.) (b) What is the change in kinetic energy of the car&#...
*March 8, 2014*

**Physics**

After a 0.200-kg rubber ball is dropped from a height of 1.95 m, it bounces off a concrete floor and rebounds to a height of 1.45 m. (a) Determine the magnitude and direction of the impulse delivered to the ball by the floor. (b) Estimate the time the ball is in contact with ...
*March 7, 2014*

**physics**

Help me
*March 6, 2014*

**Physics**

After a 0.200-kg rubber ball is dropped from a height of 1.95 m, it bounces off a concrete floor and rebounds to a height of 1.45 m. (a) Determine the magnitude and direction of the impulse delivered to the ball by the floor. (b) Estimate the time the ball is in contact with ...
*March 5, 2014*

**math**

So confusing!!! :/
*March 3, 2014*

**Physics**

Determine the force of gravity on an 850 kg car.
*March 3, 2014*

**Math**

x + y = 35 x - y = 7 Can you finish it from this step?
*March 1, 2014*

**algebra**

The y-intercept has the value of (0, y) which means the x-value is zero. The tank has been draining zero minutes. Now, can you figure out what the y-intercept will be?
*March 1, 2014*

**Algebra - Functions**

See reply below.
*February 26, 2014*

**Math**

No... (6, 8) and (10, 4) m = (8 -4)/(6-10) = 4/-4 = -1 m = (4-8)/(10-6) = -4/4 = -1
*February 26, 2014*

**Algebra Help!**

1) multiply the funtion by 8 for 8F(x) For f(8x) replace the x in the function with the (8x) 2) Domain is the values for x that can be used so that the function is defined. We never want the square root of a negative number or division by zero because that will caust the ...
*February 26, 2014*

**Physics**

A light string can support a stationary hanging load of 26.4 kg before breaking. An object of mass m = 3.19 kg attached to the string rotates on a frictionless, horizontal table in a circle of radius r = 0.795 m, and the other end of the string is held fixed as in the figure ...
*February 23, 2014*

**Physics**

A light string can support a stationary hanging load of 26.4 kg before breaking. An object of mass m = 3.19 kg attached to the string rotates on a frictionless, horizontal table in a circle of radius r = 0.795 m, and the other end of the string is held fixed as in the figure ...
*February 22, 2014*

**Chemistry **

In a 1.0 x10-6 M of HNO3 (aq) at 25 degrees celsius identify the relative molar amounts of theses species HNO3- H3O+ OH- NO3- H2O
*February 21, 2014*

**Social Studies--Check My Answers Please--**

Ms Sue. I have tried time and time again to tell you that your comments are rude. The way you told destiny that shes guessing was rude. If she was genuinely asking than that might have lowered her self esteem. I hope than next time you understand that there are other more ...
*February 20, 2014*

**calculus**

Surface area of revolution y=(x^3)+3 about the x-axis from (0,1)
*February 19, 2014*

**Chemistry**

P4 + 5O2 P4O10 , 1.5 moles of product were made in 30 seconds. What is the rate of reaction?
*February 19, 2014*

**world civilizations**

What contributions did the Egyptian made to literature
*February 17, 2014*

**math**

Write 7,030,000,000 in scientific notation
*February 16, 2014*

**Physics**

The gravitational force exerted on a baseball is 2.28 N down. A pitcher throws the ball horizontally with velocity 12.0 m/s by uniformly accelerating it along a straight horizontal line for a time interval of 177 ms. The ball starts from rest. (a) Through what distance does it...
*February 15, 2014*

**Projectile physics**

The average speed of a nitrogen molecule in air is about 6.70 ✕ 102 m/s, and its mass is about 4.68 ✕ 10-26 kg. (a) If it takes 3.80 ✕ 10-13 s for a nitrogen molecule to hit a wall and rebound with the same speed but moving in an opposite direction (...
*February 13, 2014*

**math check**

23/17 < 5/3 Found LCD 69/51 85/51
*February 11, 2014*

**math check**

23/17 < 5/3 Found LCD 69/51 85/51
*February 10, 2014*

**math**

One weekend, there were 95 pizzas ordered for the sophomore dorm. That weekend 19 customers ordered their pizza with just pepperoni, 17 customers ordered their pizza with just sausage, 18 ordered theirs with just onions, 15 ordered theirs with pepperoni and sausage, 13 ordered...
*February 9, 2014*

**math**

In a survey of 25 college students, it was found that 9 were taking an English class, 14 were taking a math class, and 8 were taking both English and math. How many students were taking a math class only
*February 9, 2014*

**math**

3 3/5p =2/5
*February 5, 2014*

**math**

3 3/5p =2/5
*February 5, 2014*

**math**

Y+4/5=3 1/10 how do u solve
*February 5, 2014*

**math help**

I got 2 12/32. When I multiply the mixed fraction 2 1/4, I don't have to add the 1?
*February 5, 2014*

**math help**

Evaluate 1/8n + 2 1/4 n=3/4 How do u solve
*February 5, 2014*

**Math**

Trail mix is sold in 1 pound bags Mary will buy some trail Mix and repackage it so that each of the 15 members of her hiking club gets one 2/5 pound bag how many 1 pound bags of trail mix should mary buy to have enough trail Mix without leftovers
*February 4, 2014*

**Science help.**

Ms. Sue, i dont know if you will read this, but you shouldnt feel like since your practically famous on jiskha, that you are able to act like you are peoples parents. If they want to "chit chat"(and who says that) as long as they are not hurting anybody as well as ...
*February 4, 2014*

**Pol 201**

Question 4.4. Liberalism rests in a conception of equality whereby the government (Points : 1)
*February 3, 2014*

**math**

There is a dog kennel that has 28 dogs, there is 6 kennels; how many dogs per kennel is there?
*February 2, 2014*

**Physics**

thanks so much!!!
*January 31, 2014*

**Physics**

If a 65 kilogram load was raised 6 meters in 60 seconds determine the minimum rated wattage of the motor needed to accomplish this assuming the motor is 75% efficient. give your answer in W.
*January 31, 2014*

**Physics**

thanks so much!!!
*January 31, 2014*

**Physics**

an object in completely submerged in a liquid of density .65 grams per cubic centimeter at a depth of 4 meters what is the total pressure on the object. State your answer in atmospheres. I only get 3 tries and both my other attempts failed. Ill lose credit now please help!
*January 31, 2014*

**Statistics**

WEB CALCULATOR EXERCISE Descriptive Statistics 1 The table below presents data for a sample of people who completed a religious survey. Age Gender Denomination Church Attendance 56 1 7 4 46 2 6 5 49 2 6 5 49 1 1 5 27 2 9 5 51 1 4 2 47 2 2 3 67 1 5 4 49 2 2 6 33 1 12 6 55 2 9 5...
*January 28, 2014*

**algebra 2**

If the cube root includes only the (x+8), then add 6 to both sides. cube root of (x+8) = 4 Now cube both sides to get x + 8 = 64 x = 58 Check your answer.
*January 28, 2014*

**math**

1/6 of whole cake = 2 pieces multiply by 6 to get 12 pieces check your answer. 1/6 of 12 does = 2
*January 28, 2014*

**math**

First get the same units 2 m and .9 m wall = x x^2 + .9^2 = 2^2 x^2 + .81 = 4 solve for x.
*January 28, 2014*

**American history**

b
*January 22, 2014*

**physics**

A 61.3 kg astronaut is on a space walk when the tether line to the shuttle breaks. The astronaut is able to throw a 11.0 kg oxygen tank in a direction away from the shuttle with a speed of 10.6 m/s, propelling the astronaut back to the shuttle. Assuming that the astronaut ...
*December 18, 2013*

**math**

If 3 divided by X+10 = 1 divided by 2X then what does X equal?
*December 16, 2013*

**math**

If 3 divided by X+10 + 1 divided by 2X then what does X equal?
*December 16, 2013*

**Math check**

Round 9.9957to the nearst hundredths 10.0000
*December 15, 2013*

**Quick math help**

45 = 20 + 3x Solve for x to find how many visits. without algebra... thing about subtracting 20 from 45 to get 25 then divided by 3 to get the number of visits.
*December 11, 2013*

**Quick math help**

65 + .45(miles) = daily cost y = 65 + .45x daily cost = 65 + .45(450)
*December 11, 2013*

**math**

Write the decimal as a fraction or mixed number. 4.488
*December 9, 2013*

**PHYSICS IMP PLS**

That is average a, I ended up using the formula to calculate a speed 0.001 s before the given time then dV/dT to get instantaneous a, which then got the right answer
*December 8, 2013*

**PHYSICS IMP PLS**

For a? Derivative with respect to what? We do not know mass, just ratio, so assume x= ration, then derivative of ln(x) =1/x = 1/ratio?
*December 8, 2013*

**Science**

For a cell of the CsCl type (figure 9.18), how is the length of one side of the cell,s, related to the sum of the radii of the ions, r subscript cation + r subscript anion? Figure 9.18 : i . imgur . com / zHj2SGW.png Another question : Consider the NaCl unit shell in figure 9....
*December 7, 2013*

**Logic**

A fallacy is an argument that a. is a weak inductive argument. b. makes a mistake in deriving a conclusion. c. has a false conclusion. d. is a sound inductive argument.
*December 6, 2013*

**Math**

I think that you might have only part of the question here.
*December 5, 2013*

**math**

90% of the class = 27 27/.90 = 30 check the 90th percentile means 90% scored at or below. So.. of 90% of 30 does = 27
*December 5, 2013*

**math**

50-21 = 29 consonants 29/50
*December 5, 2013*

**Math**

Chris = 2(Lacey) - 5 That is 5 less than twice Lacey. Using chris: 5 - 2n 18 chris or 18(5-2n)
*December 5, 2013*

**math**

5 + 3 + 2 = 10 5/10 or 1/2 is milk 3/10 is banana 2/10 is strawberry 1/2 times 8 = 4 oz milk 3/10 times 8 = 24/10 or 2.4 oz banana 2/10 times 8 = 16/10 or 1.6 strawberry check: 4 + 2.4 + 1.6 = 8 oz.
*December 5, 2013*

**math**

Take the difference to find the discount and then divide that number by 1200 to find the discount rate.
*December 5, 2013*

**math**

how do I rename 10 as a fraction
*December 5, 2013*