# Posts by jo

Total # Posts: 489

**Physics**

An 8.74-kg block slides with an initial speed of 1.52 m/s down a ramp inclined at an angle of 27.0° with the horizontal. The coefficient of kinetic friction between the block and the ramp is 0.64. Use energy conservation to find the distance the block slides before coming ...

**accounting**

A company that uses perpetual inventory system made the following cash purchases and sales: January 1 Purchased 100 units at $10 per unit. February 5: Purchased 60 units at $12 per unit. March 16: Sold 40 units for $16 per unit. Prepare general journal entries to reord the ...

**accounting**

A company purchased 1000 units of inventory on September 25 and the cost per unit was $8.50. Terms of the purchase were 2/10, n/30. The invoice was paid in full on October 4. (Assume a perpetual inventory system). Prepare the journal entries to fully reflect these merchandise ...

**phy**

Is the string massless? If the string is of mass per unit length p, then we will get tension as a function of height. However, if the string is massless, the tension in the string will simply equal the force that the box puts on it. Draw a force diagram. That's how you ...

**physics**

Two identical cars are traveling at the same speed. One is heading due east and the other due north, as the drawing show. What is true regarding the kinetic energies and momenta of the cars?

**economics**

Two people enter a bus. Two adjacent cramped seats are free. Each person must decide whether to sit or stand. Sitting alone is more comfortable than sitting next to the other person, whihc is more comfortable than standing. a.) Suppose that each person only cares about her own...

**physics**

just a couple more questions 1.) The power needed to accelerate a projectile from rest to is launch speed v in a time t is 43.0 W. How much power is needed to accelerate the same projectile from rest to launch speed of 2v in a time of 1/2t? 2.)A ball is fixed to the end of a ...

**physics**

just a couple more questions 1.) The power needed to accelerate a projectile from rest to is launch speed v in a time t is 43.0 W. How much power is needed to accelerate the same projectile from rest to launch speed of 2v in a time of 1/2t? 2.)A ball is fixed to the end of a ...

**physics**

just a couple more questions 1.) The power needed to accelerate a projectile from rest to is launch speed v in a time t is 43.0 W. How much power is needed to accelerate the same projectile from rest to launch speed of 2v in a time of 1/2t? 2.)A ball is fixed to the end of a ...

**physics**

thank you for answering this and the other one

**physics**

1.)The apparent weight of a passenger in an elevator is greater than his true weight? Why is that? 2.) The radius of larger circle is twice that of a small circle. Two identical stones are attached to cords that are being whirled on a table top at the same speed. How would the...

**Chemistry**

Organic hydrogenation reactions, in which H2 and an "unsaturated" organic compound combine, are used in the food, fuel, and polymer industries. In the simplest case, ethene (C2H4) and H2 form ethane (C2H6). If 124 kJ is given off per mole of C2H4 reacting, how much ...

**physics**

Two cars are traveling at the same constant speed v. Car A is moving along a straight section of the road, while B is rounding a circular turn. Which statement is true about the acceleration of the cars? a.) acceleration of both cars is zero b.) car A is accelerating but car B...

**economics**

For anyone with experience working with game theories... 1.) Two animals are fighting over some prey. Each can be passive or aggressive. Each prefers to be aggressive if its opponent is passive, and passive if its opponent is aggressive; given its own stance, it prefers the ...

**economics (game theory)**

For anyone with experience working with game theories... 1.) Two animals are fighting over some prey. Each can be passive or aggressive. Each prefers to be aggressive if its opponent is passive, and passive if its opponent is aggressive; given its own stance, it prefers the ...

**physics**

Here were two tricky questions. Please provide steps. Answers are not necessary (since these are practice questions for an exam). 1.) The centrifuge is a device in which a small container of material is rotated at a high speed on a circular path. Such a device is used in ...

**physics**

Here were two tricky questions. Please provide steps. Answers are not necessary (since these are practice questions for an exam). 1.) The centrifuge is a device in which a small container of material is rotated at a high speed on a circular path. Such a device is used in ...

**calculus**

Find the equation of the tangent line to the graph of f(x)=4x^3-1x^2+1 at x=-2.

**chemistry**

1,3,4,6

**math**

what is the dependent variable in math

**com/155**

include a discussion of sentence variety and the rhythm of the author's writing about Individuals can be denied credit for a number of reasons.

**physics**

thanks

**physics**

How do we tell if an object is in free fall?

**physics**

Here's a physics problem. I don't care about the answer, i just want to know how to do it. don't have to be too detailed.. but i don't really kno how to start this 1.) A model rocket blasts off from the ground rising straight upward with a constant acceleration...

**physics**

Here's a physics problem. I don't care about the answer, i just want to know how to do it. don't have to be too detailed.. but i don't really kno how to start this 1.) A model rocket blasts off from the ground rising straight upward with a constant acceleration...

**physics**

how do i solve for total time? 6.44*2.68?

**physics**

rewriting this, since it was typed wrong. In reaching her destination, a backpacker walks with an average velocity of 1.34 m/s, due west. This average velocity results because she hikes for 6.44 km with an average velocity of 2.68 m/s, due west, turns around, and hikes with an...

**physics**

okay. so regarding number 1. I will use the first method. So I will calculate using this formula? x = v0t + 1/2at^2, in which case.. x = 86(1.70) + 1/2(-10)(1.70)^2? I get x, which would be the position.. how do figure out the height over initial velocity? do i plus 0 in for v0?

**physics**

Here's a physics problem. I don't care about the answer, i just want to know how to do it. don't have to be too detailed.. but i don't really kno how to start this 1.) A model rocket blasts off from the ground rising straight upward with a constant acceleration...

**com/155**

write a 100- word passage to Susan Anker, the author of the course's textbook, in which you describe five details from her book that are good and five details about the book that are well written. Where can I find Susan Anker's books

**Math**

having problems with this one: 4 qt 9 pt = ______ pt

**chemistry**

Q: I just did an online chemisty lab for Oxidation States of Manganese and I'm stuck. I have three test tubes that have been prepared as follows: Tube 1- Starting PH 13.82 2 mL of KMnO4 1 mL of NaOH Tube 2- Starting PH 7 2 mL of KMnO4 Tube 3- Starting PH 0 2 mL of KMnO4 1 ...

**chemistry**

1.)KMnO4+H2SO4+NaHSO3--> 2.)KMnO4+NaOH+NaHSO3--> 3.)KMnO4+NaHSO3----> Write the net ionic equations for the reactions

**Maths**

I need help with the following if that's ok? Calculate the discriminant of the quadratic expression 2x 2 + 5x − 2.

**Algebra**

Dont even know where to start on this one! x +3 - 1/x=0 2a-b =8 3a+2b=5 Please help!!!

**early american history**

How did capitalism, agriculture, and industrialization contributed to economic development, regional specialization, and social reforms in early american history?

**TI-83 CALC PROGRAM**

Please can anyone help me with this or any part of it? Be very grateful as left it too late... Write a program for ti-83 calculator which generates and displays integer values for A, B and C between 1 and 10; • requests the student to input the solution to the equation...

**algebra**

Solve the equation 3X +1 = 5

**Managerial Economics**

. Remox Corporation is a British firm that sells high-fashion sportswear in the United States. Congress is currently considering the imposition of a protective tariff on imported textiles. Remox is considering the possibility of moving 50 percent of its production to the ...

**Math**

P(3 correct)= (.25)^3 x (.75)^2 combinations; 5C3= 5!/3!2!= 10 answer is 1/64 x 9/16 x 10 = 90/1024

**social studies**

Historians have used the terms "robber barons" and "captains of industry" to describe the powerful industrialists of the late 1800's. compare the two points of view reflected by these terms.

**6th grade - English**

Antonym = opposite meaning of the word

**english**

How would you like us to help you with this assignment

**Physics**

The answer 'B' is wrong? But the only difference is direction of field.

**ap physics**

25521 J

**Homework**

sheer and horse

**3rd grade**

cheerios

**computers**

Saguaro Federal has mainframes for all of its banks and businesses must the company use the Ethernet or Token Ring protocol? Explain your choice why is this choice appropriate?

**PreCalculus**

A variable star is one whose brightness alternately increases and decreases. For the variable star Delta Cephei, the time between periods of maximum brightness varies by +/- 3.5 magnitude. (a)Find a function that models the brightness of Delta Cephei as a function of time. How...

**PreCalc**

sorry

**Jo**

That makes sense but were did you get of 7.9 from. Once I know that I under stand subtracting the period... just don't know were that value came from h t t p : / / w w w . j i s k h a . c o m / d i s p l a y . c g i ? i d = 1 2 6 0 2 4 6 6 3 4

**PreCalc**

Naturalists find that the populations of some kinds of predatory animals vary periodically. Assume that the population of foxes in a certain forest varies sinusoidally with time. Records started being kept when t = 0 years. A minimum number, 200 foxes, occured when t = 2.9 ...

**PreCalc**

h t t p : / /w w w . j i s k h a . c o m / d i s p l a y . c g i ? i d = 1 2 6 0 2 3 0 7 8 3 thats fair but can i ask why you do not perfer to use a formula?

**PreCalc**

C = 2.9 D = 200 forgot to mention that put I implied that

**PreCalc**

h t t p : / / w w w . j i s k h a . c o m / d i s p l a y . c g i ? i d = 1 2 6 0 2 2 5 7 6 7 ok this is what i mean. For exmaple take this problem that I asked for help with before Naturalists find that the populations of some kinds of predatory animals vary periodically. ...

**Pre Calc**

please h t t p : / / w w w . j i s k h a . c o m / d i s p l a y . c g i ? i d = 1 2 6 0 2 2 5 7 6 7

**PreCalc**

y =( (C-A)/2 ) sin( (X - (A - ( (C - A)/2 ) ) )( pi/(C-A) ) ) + (B - ( (B-D)/2 ) How do I rearange this for this equation for the all of the variables including A, B, C, D, X were pi is the greek leter pi if you didn't notice this is the general formula for when you are ...

**geography**

why would the countryside get smaller, services are declining and also why are the costs expanded.

**math**

How do I work out Logs on my calculator to do the sum Log6x=0 or Logx64=2. I have a sharp EL-EL531WH Advanced D.A.L. What is x? This is how I work this one out on it, Log2^16=4 I do Log big number 16 /Log small number 2 = 4.

**math**

significant numbers 2.8723 * 1.6 = 4.59568. Is it 4.6 because it is the smallest number you are multiplying it by in the sum? e.g. 2.8723 has 5 signifigant figures but 1.6 has 2 so the answer has no more than 2.Smallest number of significant figures. With addition is it the ...

**cjs220**

Identify the bail system beneficiaries

**math**

how many picometers are there in a kilometre? Is the answer a negative or positive? =10^15 or = 10^-15

**math**

does 10^3 * 10^2 * 10^4 * 10^3 = 10^12

**math**

complete the following conversions. 155u to m = *10^-3 1850n to mm = *10^-6 1.68G to M = *10^3 from G to M = *10^3

**math**

how many picometers are there in a kilometre? The answer is 10^-15 or 10^15? Thanks

**math**

Write an explanation of the steps you use to convert a measurement in one unit to a measurement in another. 1) How many picometers are there in a kilometre?

**math**

Dear Bob I don't understand what you mean.

**math**

I really do not know how to get the answers to these, can you show me on a table form? Thanks 155km to m 2.56Ml to l 155um to mm 1,850nm to mm 1.68Gm to Mm 165pm to nm 2,750u to M 1.5kg to mg I would like to know how to work these out. Thank you

**physics**

15.97

**math**

If a vehicle travles with a constant acceleration of 3km/hr for 5 hours, what was its initial velocity if the final velocity was 100km/hr? Can you please show me how to work this out in math terms.Can you explain it to me. thank you so much.

**math**

If a stone is dropped from rest and falls under gravity with an acceleration of 10m/s2, how long will it take before the stone is travelling at 25m/s? Can you show me how to work this out with math rules. I do not get it. Thanks

**math**

If a car has an initial velocity of 103m/s and accelerates at 1m/s for 3 seconds, what will its final velocity be? Can you please show me how to work this question out with math answers and explain it to me. Thank you.

**math**

2,750um to Mm CF=10^12 2,750um=2,750*10^-12 What does CF stand for. small to big you divide, so why don't I divide by 5 lots of 1000. Can you please give me some examples of conversions like this one. Thanks

**math**

Can you please give me a few different math examples of what you meant when you said - You do not add powers with different exponents, but not powers of different bases. Thank you so much.

**math**

What is the difference between the constant of proportionality and the mean? Constant and Mean? Thanks

**math**

would 64974000345 be written 6.4*10^10 or 6.4974*10^10 2) how would you write 7.991*10-10 in scientific notation? 3) does 9.0 have 2 (sf) and 100.0000 have (7sf)?I'm confused about the trailing zeros when it comes to decimal points.These are trailing zeros. 4) What do you ...

**math**

convert each of the following: . 155km to m . 2.56Ml to l .155uF to mF . 1,850nm to mm . 1.68Gb to Mb . 165pm to nm

**math**

how many significant figures do the following numbers have? 1)0.023 2) 1000 3) 8120 4) 7.991 * 10^10 5) 0.00390 6) 9.010 * 10-2 7) 9.0 * 10^-3 8) 3.4 *10*4 9) 1090.00010. How is 1090.00010 written in scientific notation?

**math**

how would I write this in scientific notation 04980000007507 I am getting confused with it all can you help me fine examples with this. thanks also how would I add this up 10^4+10^4+10^3= is it 21000 or 10^11

**Statistics**

Safety researchers, interested in determining whether the occupancy of a vehicle might be related to the speed at which the vehicle is driven, have observed the following speed (mph) measurements for two random samples of vehicles. Alone With Pass 64 44 50 52 71 54 55 48 67 69...

**statistics**

For the following data independent samples, could the null hypothesis that the population means are equal be rejected at the 0.05 level? Sample1 Sample2 Sample3 Sample4 15.2 10.2 14.9 11.5 12.2 12.1 13.0 13.1 15.0 8.5 10.8 11.5 14.6 8.1 10.7 6.3 9.7 10.9 13.3 12.0 13.6 10.6 8....

**chemistry**

Isotonic saline is a 0.9%(g/100ml) solution of salty water. You are asked to make up 2 Litres of isotonic saline. How much salt should you weigh out? Is this right? 0.9g/100ml * 2000ml = 18g of salt should be weighed out.

**chemistry**

how many holecules are in 1 L of water (assume that the density of water is 1g/ml. I think 1000g/2*1.01 + 16.00g/mol =55.5 mol =55.5moles * 6.02*10^23molecules/mole =3.34 * 10^25 molecules

**math**

Where is the best place to look up and learn about algebra expressions then turned into equations? thanks

**math**

what iste geatest common factor of 42 an 63

**math**

I am having trouble with algerbra. simplifying expressions. e.g. write an equation to represent the following situation. Where is the best place to look this up for a beginner? e.g. N+5=23 T=3H where T represents Tobys weight. The adult weighed three times as much as the child...

**chemistry**

hi, I have redone this question. Is this right. How many grams of NO2 will be produced when 5.00 moles of NO react? 5 moles of NO2 produces 5 moles of NO (1:1ratio) mass(g) = 5 moles * 46g/mol = 230g

**math**

write the following in scientific notation: This is what I wrote, am I right? 2.033Km= 2.033 * 10 3 Km 54890W= 5.4890 * 10 4 W 0.073461Kg= 7.3461 * 10 -2Kg 0.00000641172m= 6.41172 * 10-6m 0.3695245454= 3.695245454 * 10-1

**chemistry**

5 moles of NO2 produces 5 moles of NO (1:1ratio) mass(g) = 5 moles * 46.01g/mol = 230g

**chemistry**

How many grams of NO2 will be produced when 5.00 moles of NO react? I have 5 moles of NO2 produces 5 moles of NO (1:1ratio) mass (g)=5 moles times 16.02g/mol=80.1g

**chemistry**

you have a block of ice that weighs 500g. how many CO2 molecules do you have?

**chemistry**

Why is balanced chemical equation for H2O written 2H2+0>2H20 and not H20>H20?

**chemistry**

Isotonic saline is often given to patients intravenously to replenish lost fluids. Isotonic saline is a 0.9g/100ml solution of salty water. You are asked to make up 2:1 of isotonic saline. How much salt should you weigh out?

**chemistry**

Isotonic saline and is often given to patients intravenously to replenish lost fluids. Isotonic saline is a 0.9% 9G/100ml) solution of salty water. You are asked to make up 21 of isotonic saline. How much salt should you weigh out?

**chemistry**

I am not sure I need help. thanks.

**chemistry**

if 10 mol of hydrogen reacted with oxygen, what volume of liquid water could be produced?

**science**

if 10 mol of hydrogen reacted with oxygen what volume of liquid water could be produced

**Science**

Repeated trials?

**linking verbs**

David relaxed on the couch after school.

**macroeconomics**

Assume that the government purchases decrease by 10 billion, with other factors held constant including the price level. Calculate the change in the level of real GDP demanded for each of the following values of the MPC. Then calculate the change if the government, instead of ...