Friday

April 18, 2014

April 18, 2014

Total # Posts: 612

**math**

If Steven can mix 20 drinks in 5 minutes, Sue can mix 20 drinks in 10 minutes, and Jack can mix 20 drinks in 15 minutes, how much time will it take all 3 of them working together to mix the 20 drinks? A. 2 minutes and 44 seconds B. 2 minutes and 58 seconds C. 3 minutes and 10 ...

**math**

If Sam can do a job in 4 days that Lisa can do in 6 days and Tom can do in 2 days, how long would the job take if Sam, Lisa, and Tom worked together to complete it? A. 0.8 days B. 1.09 days C. 1.23 days D. 1.65 days E. 1.97 days thanks.

**biology**

Biotechnology allows us to use living organisms or their processes for human needs or purposes. Currently, this topic includes such general examples as cloning, stem cells (adult, umbilical cord, and embryonic), DNA fingerprinting, biological warfare, bioremediation, genetical...

**accounting**

Select a company you are familiar with. Explain each step of the accounting cycle. Describe at least one transaction that would occur at the company you selected in each of these steps

**hca 210 measuring quality**

Write a 350- to 700-word paper in APA format describing two approaches or indicators to measuring patient outcomes. Measuring the quality of care is essential to being able to identify which areas of patient care need improvement. A positive patient outcome is one measure of q...

**college algebra**

Kathy bicycles 8 km/h faster than Chris. In the same time it takes Chris to bicycle 57 km, Kathy can bicycle 81 km. How fast does bicylist go?

**Fractions From greatest to least**

least to greatest: 3,3/10,4/5,2,-0/.5

**HCA 220**

What is the seven organizational approaches and how to use them?

**English (Commas)**

where can i get some sentences i can put in commas

**English (Commas)**

yes

**physical science**

what is the ionic compound for aluminum permanganate

**Microeconomics**

When a university decides to add to the football stadium instead of adding to the baseball stadium, it faces the:

**math**

48, but it says he uses all the candy and gum

**math**

Mr. Jackson is preparing bags of treats to give trick or treaters on Halloween. He has 48 pieces of candy and 60 pieces of gum. He uses all the candy and gum, and he puts the same ratio of candy to gum in each bag. What is the largest number of bags he could have made?

**Psychology**

According to B.F.Skinner, superstitious behaviors are the result of what? Is it continuous reinforcement or accidental reinforcement?

**Spanish Homework Help**

como es u tipico para ti?what does it mean?!

**teaching**

Discuss one way in which Piaget and Vygotsky share similar ideas and one way in which their views differ. To which theoretical view do you relate and why?

**literature**

what are 2 examples of don't judge a book by its cover in sonnet 130

**economics**

Hold capital constant at 100 while you increase labor, what happens to output? Hold labor constant to 100 and raise the level of capital. What happens to output? What happens when you raise labor and capital by the same amount? i think the first 2 ques the output increases, wh...

**sceince**

dentify the legislation that you think is linked to the issue, and explain why you think there is a connection. Consult the National Congress of American Indians Web site, the Indian Country newspaper, or another online source for examples of pertinent issues.

**cultural diversity**

summary of a current issue between Native Americans and the federal government. Identify the legislation that you think is linked to the issue, and explain why you think there is a connection. I have searched google, but no answers. Please help with some good pointers and I...

**Reseach paper**

I am doing the same Research Assignment through Penn Foster also and am having some of the same troubles. I found the AMA's 5.07 information which answers all the questions but I am having trouble finding other sources to use to complete the paper.

**critical thinking**

What theoretical considerations enter into the defintion of natural? In nature, during pregnancy, progestin is producted to block the release of additional eggs. The Pill is progestin in tablet form. Therefore, the Pill is a natural method of birth control.

**science**

when water falls as precipition it either runs off earth surface or sinks into the ground as____________________

**history**

what was truman doctrine?

**Algebra**

no

**Physics**

Did Einstein support quantum mechanics as being fundamental physics, or did he think quantum mechanics was inconclusive?

**Physics**

What evidence supports the notion that light has wave properties? What evidence supports the view that light has particle properties?

**Physics**

How does the amplitude of a matter wave relate to probability?

**Physics**

Does the de Broglie model assert that an electron must be moving in order to have wave properties?

**Physics**

How can elements with low atomic numbers have so many spectral lines?

**english**

what follows a linking verb or a action verb. the simple tense of verbs. follows a preposition. sometimes called the simple predicate.

**science**

where does the spotted tree frog fit into the food chain

**sci275**

biome by responding to the following: Provide a one-sentence description of typical precipitation and temperature for summer and winter. Use terms such as cool, cold, warm, hot, dry, and wet. Then, identify the characteristics of a plant and animal that is seen regularly in yo...

**Critical Thinking**

What kind of fallacy is this? "If it weren't for the president's evvironmental policy, we wouldn't be dealing with these environmental catastrophes."

**Chemistry**

How much volume in liters will 100.0 g of oxygen occupy at 100 degrees celcius and 100 atm pressure?

**science/health**

Also remember that digestion begins in the mouth. So you could focus on this as well.

**Science**

Help! What is s reflected ray

**Literature**

How does "A Rose for Emily" demonstrate that the act of going to war ensured the demise of Southern Aristocracy? I noticed that she didn't have to pay taxes at first because the colonel knew she couldn't pay them. Are there other proofs?

**physics**

A rectangular box of negligible mass measures 5m by 1m by .5m. How many kgs of mass can be loaded onto the box before it sinks in the water? V=5*1*.5 = 2.5m^3 density of water =1g/cm^3 =1000 kg/m^3 I also know that when the density of the mass is greater than the density of w...

**physics**

How much absolute (total) pressure must a submarine withstand at a depth of 120m in the lake. Give answer in kPa. (Use 10m/s^2 for g). h=120m p_water = 1 g/cm^3 = 1000 kg/m^3 p_atmosphere = 101.3kPa P_total = ? P_water =density *g*h =1000*10*120 =1200000Pa =1200kPa P_total =12...

**physics**

A block of wood weighs 40 N in air and 30 N in water. What is the buoyant force exerted by water on the block? B = -F_g = B-F_g =30-40 = - 10N Is this correct?

**physics**

The density of gold is 19.3 x 10^3 kg/m^3. What buoyant force does a .6 kg gold crown experience when it is immersed in water? B=m_water*g =p_water*v_water*g =p_water*v_gold*g and to find v_gold =m/density and from there would p_water =1000kg/m^3?

**physics**

An ideal gas is kept under constant pressure of 1 atm. If initial temperature is 301K and the volume increases by 10% what is the final temperature of the gas? T2=? V1/V2= T1/T2 V1/V2= (301K)/T2 .10/1= (301K)/T2 Is the side with volume correct? The 10% part confuses me. Thanks...

**physics**

ideal gas is kept under constant pressure of 1 atm. If initial temperature is 301K and the volume increases by 10% what is the final temperature of the gas? T2=? V1/V2= T1/T2 V1/V2= (301K)/T2 .10/1= (301K)/T2 Is the side with volume correct? The 10% part confuses me. Thanks fo...

**physics**

A solid object floats with three-fourths of its volume beneath the surface of eater. What is the object's density? Give answers in g/cm^3. p_o=? p_object/p_water = v_water/v_object p_o/(1 g/cm^3) = ? for the volume side would it be 3/4 so that p_o/(1 g/cm^3)=3/4?

**physics**

An object floats with half of its volume beneath the surface of the water. The weight of the displaced water is 2000N. What is the weight of the object? I'm confused by this problem. How would I go about solving this? My guess would be that the weight of the object is 2000...

**physics**

The density of gold is 19.3 x 10^3 kg/m^3. What buoyant force does a .6 kg gold crown experience when it is immersed in water? B=m_water*g =p_water*v_water*g =p_water*v_gold*g and to find v_gold =m/density and from there would p_water =1000kg/m^3?

**physics**

A block of wood weighs 40 N in air and 30 N in water. What is the buoyant force exerted by water on the block? B = -F_g = B-F_g =30-40 = - 10N Is this correct?

**physics**

How much absolute (total) pressure must a submarine withstand at a depth of 120m in the lake. Give answer in kPa. (Use 10m/s^2 for g). h=120m p_water = 1 g/cm^3 = 1000 kg/m^3 p_atmosphere = 101.3kPa P_total = ? P_water =density *g*h =1000*10*120 =1200000Pa =1200kPa P_total =12...

**physics**

A rectangular box of negligible mass measures 5m by 1m by .5m. How many kgs of mass can be loaded onto the box before it sinks in the water? V=5*1*.5 = 2.5m^3 density of water =1g/cm^3 =1000 kg/m^3 I also know that when the density of the mass is greater than the density of wa...

**Physics**

I added the speed for point B is that I can get part b). So how would I find the max speed?

**Physics**

A roller coaster car of mass 1000kg is riding along a track from point A to point C. (point A is 75m high, B is 50m high and C is 100m high, so that there are a total of three hills.) the final velocity at point C is 10m/s a) Assume no friction what is the speed of the car at ...

**Physics**

A roller coaster car of mass 1000kg is riding along a track from point A to point C. (point A is 75m high, B is 50m high and C is 100m high, so that there are a total of three hills.) the final velocity at point C is 10m/s a) Assume no friction what is the speed of the car at ...

**chemistry**

How do I figure out the mass of 1 M&M?

**SCI 275 Repost for Cindy**

conservation and preservation. Do you believe that humans can harvest forest resources in an environmentally friendly way? Or, should national forests be left in their natural state in which resources are not used to benefit humans? To which side are you inclined? Provide spec...

**human resources**

Compliance with the law and Reliability. These are the two aspects of performance appraisal I need help on. 1. What are the special challenges in each area? 2. What would be the impacts on employees and employers if these challenges were not addresses?

**human resources**

two aspects of a performance appraisal from the following list. What are the special challenges in each area and what would be the impacts on employees and employers if the challenges were not addressed? o Strategic Relevance o Criterion Deficiency o Criterion Contamination o ...

**Physics**

Well isn't T = to the time of one revolution? So I took 3rev/2s to get 1.5s

**Physics**

A bike wheel rotates uniformly through 2 revolutions in 3 seconds. a) what is the period of the wheel's rotation? T=3rev/2s=1.5s b) what is the frequency of the wheel's rotation? (in Hertz) f=1/T =1/1.5 =.666Hz c) what is the angular speed of the wheel(provide answer i...

**physics**

A .5kg ball on the end of a string is revolving uniformly in ahorizontal circle of radius 1m. The ball makes 2 revolustion in a second. a) determine the linear (tangential) speed of the ball. For this part of the question would I do this: v=d/t =1m/.5s =2m/s b)determine the ba...

**physics**

A car goes around a flat curve of radius 50m at a speed of 35mph. What must be the minimum coefficient of static friction between the tires and the road for the car to make the turn? r=50m v=35mph=15.65m/s F_sf=? I know that F+sf= (meu)(F_N) But the mass of the car isn't g...

**physics**

A car traveling 65mph rounds an 100m radius horizontal curve with the tires on the verge of slipping. How fast can this car round a second curve or radius 300m? (assume the same amount of friction between the car's tires and each road surface) first curve v=64mph= 29.05m/s...

**physics**

A 5kg object moves to the right with a speed of 2m/s. It collides in a perfectly elastic collision with a 2 kg object moving to the left at 5m/s.What is the total kinetic energy after the collision? In elastic collisions KE is conserved so KE_i =KE_f KE_f=1/2(5)(2)^2+ 1/2(2)(5...

**physics**

A 1 kg mass moving to the right at a speed of 10m/s collides head-on in a perfectly inelastic collision with a stationary 2kg mass. How much KE is lost during the collision? First I found V_f to be 3.3m/s then I found KE_i=1/2m_1v_1i^2 +1/2 m2V_2i^2 =1/2(1)(10)^2 +1/2(2)(0)^2 ...

**physics**

A car of mass 1500kg moves to the right along a level straight road at a speed of 25 mph. It collides directly with a stopped motorcycle of mass 150kg. What is the total momentum after the collision? p_initial = p_final m_1*v_1i +m_2*v_2i = m_1*v_1f + m_2*v_2f (1500)(11.17m/s)...

**physics**

When a cannon fires a cannonball, the cannon will recoil backward because the a) energy of the cannonball and the cannon is conserved b) momentum of the cannonball and cannon is conserved c)energy of the cannon is greater than the energy of the cannonball d) momentum of the ca...

**physics**

A ball of mass .3 kg is dropped from a height of 10m. Its momentum when it strikes the ground is? I know p=mv how would I find velocity for this problem? Thanks in advance for your help.

**Chemistry**

I am completely lost in chemistry. Everything the teacher says sounds like a different language to me and I am usually really good in the class. Can someone help me do this problem please? An element "E" is present as 10E (The 10 is like an exponent to the left of th...

**physics**

A 50kg skier pushes off the top of a hill with an initial speed of 5m/s. Neglect friction. How fast will he be moving after dropping 20m in elevation? I was wondering if i did this problem correct. PE + KE_f = KE_i mgh +1/2mv_f^2 =1/2mv_i^2 50(10)(20) + 1/2 (50)v_f^2 = 1/2(50)...

**bio**

I think I got it carbohydrates lipids proteins nucleic acids correct? still haven't found the basic element yet. I think it is carbon, but can't find anything definte

**bio**

is the answer to my question monosaccharides, polysaccharides lipids proteins?

**Biology**

what are the 4 major polymers and their functions? is the major element that makes up many of the biological chemicals, carbon?

**Algebra II**

I'm not quite sure how to set this problem up. This is the first of the entire worksheet and I'm sure if I understand one problem I can finish the rest pretty easily. The problem states: When there is no wind, Amelia flies her plane from Oklahoma City to San Francisco ...

**physics**

what distance should you keep between you and the car in front of you if the traffic is moving at 65mph? Your reaction time is 1s, and both the cars can decelerate at the same rate. Include reasonable estimate for the length of the car (you don't want your bumper to end up...

**Physics**

what distance should you keep between you and the car in front of you if the traffic is moving at 65mph? Your reaction time is 1s, and both the cars can decelerate at the same rate. Include reasonable estimate for the length of the car (you don't want your bumper to end up...

**physics**

A football is kicked at 37degrees to the horizontal and it goes a distance of 98 yd. Ignore air resistance. a) what is the ball’s initial velocity? b) what is the vertical component of the ball’s velocity? c) what is the horizontal component of the ball’s veloci...

**physics**

Can an object's velocity change direction when its acceleration is constant? a) No this is not possible because it is always speeding up b) No this is not possible because it is always speeding up or always slowing down, but it can never turn around c) Yes it is possible a...

**physics**

what distance should you keep between you and the car in front of you if the traffic is moving at 65mph? Your reaction time is 1s, and both the cars can decelerate at the same rate. Include reasonable estimate for the length of the car (you don't want your bumper to end up...

**physics**

Which of the following statements is not true? a)the horizontal component of velocity cannot be larger than the total velocity b)the vertical component of velocity cannot be larger than the total velocity c)Neither horizontal nor vertical components of velocity cannot be large...

**physics**

A car is moving with constant velocity. Which of the following is true? a) the car travels the same distance in each second b) car's velocity increases by the same amount in each second c)car's velocity decreases by the same amount in each second d)car's velocity c...

**physics**

A car is moving with constant acceleration. Which of the following is true? a) the car travels the same distance in each second b) car's velocity increases by the same amount in each second c)car's velocity decreases by the same amount in each second d)car's veloci...

**physics**

when lightning strikes you can see it at a speed of 3x10^8m/s. But you hear thunder at about 340m/s in 70 degrees air temperature. a) If you are a mile away from lightning, how long of a delay is there? b) if the delay between the lightning and thunder were 1s how far away wou...

**Physics**

You are sitting in your car at a traffic light at the foot of a 200 ft long ramp that will take you onto the interstate. If your cat can at best accelerate at 5 m/s^2 and the traffic on the interstate is moving at 65mph. will the ramp be long enough for you to reach that speed...

**Math riddle**

Ok, this is driving me crazy .Grandpa Grumps had just informed the local police that several children were rollerblading in his driveway. However, by the time Police Officer Nickham turned up, the children had gone and Grandpa Grumps couldn’t remember their faces. So Nick...

**Physics**

during a hockey game a puck of mass .3 kg is given an inital speed of 12m/s. it slides 50 m o the ice before stopping. Assume the puck decelerates at a constant rate. what is the coefficient of friction betweent the puck and the ice? I know that it would be a very small answer...

**Physics**

you lift a 10 N physics book up in the air a distance of 1m at a constant velocity of .5m/s. What is the work done by the weight of the book? a) +10 J b)-10 J c) +5 J d)-5 J 10 N is the force of gravity and to find work you do this: W=F_g(change in distance) (10N)(1m)= +10J so...

**Physics**

a packing ccrate slides down an incline ramp at constant velocity. Thus we can deduce that a) a frictional force is acting on it b) a net downward force is acting on it c) it may be accelerating d) it is not acted on by appreciable gravitational force with a constant velocity ...

**Physics**

A wooden block slides directly down an incline plane at a constant velocity of 6 m/s. What is the coefficient of kinetic friction if the plane makes an angle of 30 degrees with the horizontal? the coefficient of kinetic friction = force of kinetic friction/normal force. How wo...

**Algebra II**

Bolivian coffee sells for $4.59 per pound, and Columbian coffee sells for $5.95 per pound. How many pounds of each coffee should be mixed to produce 4000 pounds of a mixture that will be sold for $5.10 per pound? I think this is a system of equations but I'm not sure. If s...

**Chemistry- To Bob Pursleyy**

Thank you sooo much, I was using grams of Molybdenum, so I looked up the mass of an electron and converted it and got the correct answer. I thought I didn't solve for V right, I'm amazed that I got that right. Thank you for your help!

**Chemistry- To Bob Pursleyy**

I am having a hard time on how to get V in wavelength= h/mv If I multiply by mv then I get W(mv)=h Then I get Wmv=h I divide by Wm and get V=h/Wm ...but that doesn't seem to work. My other question is if I am using the correct values. W (wavelength or lamda)= 7.11x10^(-11)...

**Chemistry**

Under appropriate conditions, molybdenum emits X rays that have a characteristis wavelength of 0.711 Angstrom. These X rays are used in diffraction experiments to dtermine the structures of molecules. How fast would an electron have to be moving in order to have the same wavel...

**Vocabulary**

I have gotten help from here before and I was hoping that another kind person could help me again, since I always get such helpful answers. I have written an essay and I have my ideas stated pretty well but I am adding the final touches to it. This include spicing up the words...

**Physics**

A .5kg ball hangs on a string attached to the ceiling. If the string is cut what forces act on the ball as it falls? Ignoring air resistance. Weight is one of the forces acting on the ball. Is there another force acting on the ball? I know there isn't tension, friction. Is...

**Physics**

Two books of masses m1=10kg and m2= 20kg are connected by a rope. The horizontal force on the more massive box is 900 N. Assume there's no friction. a) what is the acceleration of the more massive box b) Acclereration of the less massive box a) f=ma 900=20a a=45m/s^2 b) f=...

**Physics**

An example of a force which acts at a distance is a) tension b) weight c) friction d) normal force Isn't the answer c) the further an object goes the more resistance?

**Physics**

A stack of books rests on a level perfectly smooth surface. A force F acts on the stack and it acclerated at 3m/s^2. A 1kg book is added to the stack. The same force is applied and now the stack accelerates at 2m/s^2. What was the mass of the original stack? I think i would us...

**Physics**

A stone is thrown straight up. At the top of the path, the net force acting on it is (ignore air resistance) a) greater than its weight b) greater than zero, but less than its weight c) instantaneously equal to zero d) equal to its weight At the very top of the path wouldn'...

**Physics**

A constant net force acts on an object. Describe the motion of the object. a) constant acceleration b) constant speed c) constant velocity d) increasing acceleration I believe the answer would be a) constant acceleration. Given F=ma. Is this correct?

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