Sunday

April 20, 2014

April 20, 2014

Total # Posts: 2,499

**Chemistry**

3Ag(s)+4HNO3(aq)-->3AgNO3(aq)+NO(g)+2H2O(l) Write the net ionic equation.

**3rd grade math**

write the missing fraction or mixed number for each number line 0,1/3,2/3,1,____,____,____,______,2 1/3 3

**Chemistry**

This topic's pretty old, but I figured it would be worth it to have the new way to solve the problem posted as well. If you're like me you're a young whippersnapper who's never even heard of normality. It's actually not as hard as DrBob says. Molarity = mol...

**english**

2. Marion needs to believe in a ____ (1 point)

**Math**

76 girls

**College Chemistry**

If the density of cylinder 1 is 3.55 , what is the density of cylinder 2? (The masses and volumes of two cylinders are measured. The mass of cylinder 1 is 1.35 times the mass of cylinder 2. The volume of cylinder 1 is 0.792 times the volume of cylinder 2.)

**math**

If a metal ball is thrown downward with an initial velocity of 22 feet per second (15mph)from a 100 foot water tower, it's height h in feet above the ground after t seconds is modeled by h(t)=-16t^2-22t+100 Determine when the height of the ball is 62 feet.

**algebra**

The strength of a wood beam varies inversely with its length. A beam is 33 feet long can support 1200 pounds. How much weight can a similar beam support if it is 23 feet long?

**maths/physics/biomechanics**

At the beginning of a race, a yacht crosses the start line and sails in westerly direction at a speed of 4 m s-1. The current of the sea is flowing at 2 m s-1 towards the north-east. Calculate how far [8 marks] and in what direction (relative to west) [8 marks] the yacht has t...

**chemistry**

Which of the following isotopes possesses a greater number of electrons than it does neutrons? A. 40Ar B. 24Mg2+ C. 34S2− D. 19F− E. 16O2− How do I determine the numbers of protons, neutrons, and electrons of each?

**physics**

A 2.00kg bullet moving at 600m/s strikes a piece of wood at rest on a frictionless table. The bullet sticks in the wood and the combined mass moves slowly down the table. a.) What is the speed of the combined mass after the collision? b.)What is the change in kinetic energy of...

**chemistry**

A graduated cylinder was used to transfer 201 mL of a 0.478 M solution of KCl to a beaker which was subsequently diluted to a final volume of 1.092 L. What is the final molarity of the KCl in the beaker after the solution is thoroughly mixed?

**Chemistry**

thanks!

**chem**

How many grams of water vapor (H2O) are in a 10.2 liter sample at 0.98 atmospheres and 26°C? Show all work used to solve this problem.

**Chemistry**

rate is 1.1 ng/dL-hr

**Chemistry**

A deceased person is found by the coronoer to have a cocaine concentration of 50 ng/dL. What is the concentration of cocaine in his blood two hours earlier?

**mth174**

A tank is full of water. Find the work W required to pump the water out of the spout. (Use 9.8 for g and 3.14 for π. If you enter your answer in scientific notation, round the decimal value to two decimal places. Use equivalent rounding if you do not enter your answer in ...

**maths**

At the beginning of a race, a yacht crosses the start line and sails in westerly direction at a speed of 4 m s-1. The current of the sea is flowing at 2 m s-1 towards the north-east. Calculate how far [8 marks] and in what direction (relative to west) [8 marks] the yacht has t...

**maths**

Two athletes are pulling on a ring. One athlete pulls with a force of 150 N in a northerly direction. The second athlete pulls with a force of 200 N in a westerly direction. Calculate the magnitude [5 marks] and direction (relative to west) [5 marks] of the resultant of these ...

**physics**

A 75 kg skydiver in free fall is subjected to a crosswind exerting a force of 60 N and to a vertical air resistance force of 100 N. Calculate the resultant force acting on the skydiver [6 marks] and his angle of fall (relative to vertical) [6 marks].

**Physics**

A driver in a car traveling at a speed of 56.0 mi/h sees a deer 116 m away on the road. Calculate the minimum constant acceleration that is necessary for the car to stop without hitting the deer (assuming that the deer does not move in the meantime).

**Physics**

I have found that it takes the lead car 11.95 s to stop and it traveled 146.4 m. But still need help with the rest.

**Physics **

Two cars are traveling along a straight line in the same direction, the lead car at 24.5m/s and the other car at 29.8m/s. At the moment the cars are 41.4m apart, the lead driver applies the brakes, causing her car to have an acceleration of -2.05m/s2. A) How long does it take ...

**Physics **

Two cars are traveling along a straight line in the same direction, the lead car at 24.5m/s and the other car at 29.8m/s. At the moment the cars are 41.4m apart, the lead driver applies the brakes, causing her car to have an acceleration of -2.05m/s2. A) How long does it take ...

**Physics**

tortoise= 10.1 t hare= 195.94(t-122) tortoise - hare= 10.1t - 195.94t + 23904.68 = 20.8 Solve for t 23883.88 = 185.84 t t = 128.5185 s tortoise t= (10.1)(128.5185)= 129.036 cm

**Math**

afraaz the answer of 12.5 is not correct, i had done the same math as you did, however the teacher said that the answer was wrong.

**Physics**

A diver springs upward from a board that is 4.10 m above the water. At the instant she contacts the water her speed is 11.9 m/s and her body makes an angle of 79.7 ° with respect to the horizontal surface of the water. Determine her initial velocity, both (a) magnitude and...

**math**

17*5=85 17+5=22

**physics**

I found the answer to part a, but I don't know how to solve part b. Part is 26.1m/s.

**physics**

A space vehicle is coasting at a constant velocity of 22.5 m/s in the +y direction relative to a space station. The pilot of the vehicle fires a RCS (reaction control system) thruster, which causes it to accelerate at 0.223 m/s2 in the +x direction. After 57.5 s, the pilot shu...

**math**

math : write an equation that uses 18-?and 10+2.explain how to decide which numbers would make it true.

**Math**

Red and blue beads are being strung to make a bracelet. How many different bracelets can be formed it each bracelet uses exactly 5 beads?

**geometry**

Simplify the ratio: 48 ft. -------- 36 ft.

**World History**

28.Olympe de Gouges

**physics**

In reaching her destination, a backpacker walks with an average velocity of 1.20 m/s, due west. This average velocity results, because she hikes for 5.94 km with an average velocity of 3.28 m/s due west, turns around, and hikes with an average velocity of 0.778 m/s due east. H...

**Physics**

Two iron spheres each have a volume of 10 cm^3 and a mass of 78g. How many electrons must be placed on each sphere so that the electrostatic force of repulsion between them just balances the force of gravitational attraction? Assume the distance between the spheres is more tha...

**science/anatomy**

1. pharynx 2. Epiglottis

**math**

I had the same question

**math**

I had the same question

**geometry**

the transamerica pyramid building shown in the photograph has four faces shaped like isosceles triangles. The measure of a base angle of one of these triangles is about 85. What is the approximate measure of the vertex angle of the triangle?

**Chemistry**

You can also use d=PM/RT. Density is mass/volume. Plug it in and solve for M.

**physics**

46

**Science**

I put Individuals of the same kind living in the same environment make up a population. All the populations of organisma living together in an environment make up a community. Is that correct?

**Science**

In my book it says Individuals of the same kind living in the same evnironment make up a population. All the grasshoppers in a field are the grasshopper population. All the populations of organisms living together in an environment make up a community What is the relationship ...

**Science**

It's not C, right?

**Science**

Nonliving things affect the organisms living in an ecosystem include weather,landforms,and?- A. habitat B. niche C. soil D. population I think its B

**Science**

I put Individuals of the same kind living in the same environment make up a population. All the populations of organisma living together in an environment make up a community. Is that correct?

**Science**

In my book it says Individuals of the same kind living in the same evnironment make up a population. All the grasshoppers in a field are the grasshopper population. All the populations of organisms living together in an environment make up a community What is the relationship ...

**physics**

When an airplane is in level flight, its weight is balanced by a verticallift, which is a force exerted by the air. How large is the lift on an airplane in such flight if the mass ofthe airplane is 1.20 x 10 cubed kg.?

**Science**

The journey of a cheese sandwich - how do you explain how cells use food using the big idea of partilces?????!!!!! HELP!!!! i hate these stupid assessments!!!!

**physics**

A 0.18 kg ball is placed in a shallow wedge with an opening angle of 110° For each contact point between the wedge and the ball, determine the force exerted on the ball. Assume the system is frictionless.

**History**

Is there any other similarities?

**History**

What do all of these former Presidents have in common? Abraham Lincoln,John F. Kennedy,James Garfield,and Franklin Roosevelt

**Reading**

I cant find any other details to replace number 5.

**Reading**

I meant to put on number 2 minerals not materials. Would that still be wrong?

**Reading**

Is this correct?

**Reading**

When you're scribbling a note with a pencil, do you ever wonder what this handy tool is made from? To get right to the point, a pencil is made of a number of materials. The inside is made of graphite that is reinforced with clay. Its wooden outside comes from cedar trees. ...

**Reading**

Icebergs can be slippery slopes for ships at sea. An iceberg can be dangerous to ships because more than 3/4 of it is under the water. Most of it isnt visible. Icebergs are found in the cold seas near the North and South Poles. The wind and currents move them through the water...

**Physics**

566

**physics**

A 80 kg man weighs 784 N on the Earth's surface. How far above the surface of the Earth would he have to go to "lose" 15% of his body weight?

**science**

laboratory connects a 16§Ù resistor, 23§Ù resistor, and a 34§Ù resistor in series and then comes the arrangement to a 36V dc source. How much current is in the circuit?

**science**

what are the forces on two charges of +0.44c and +2.4c, if they are separated bu=y a distance of 3.16cm? repel or attract each other?

**Chemistry**

Oops the charges in the equation got messed up so instead: MnO4- + 5Fe2+ + 8H+ -> 5Fe3+ + 4H2O

**Chemistry**

I had tremendous problems with this question as well, and since I now have the answer, I'll spread the love. First, you figure out how many moles of KMnO4 is used for both titrations using the equation ---- M=(mol)/(L) ---- (M=Molarity) Doing this, you would get the first ...

**math**

That question can't really be answered unless we can see the string

**5th grade math**

seven trillion six hundred fifty four billion three hundred twenty one million one hundred fifty eight thousand nine hundred six

**5th grade math**

Figure out what each place value the numbers are in

**biology**

A dominant gene V in humans causes certain areas of the skin to become depigmented, a condition called "vitiligo." Albinism is the complete lack of pigment production and is produced by the recessive genotype aa. The albino locus is epistatic to the vitiligo locus. A...

**statistics**

for a certain psychiatric evaluation z scores above 2.18 and below -2.33 are considered abnormal. what is the probability that a person evaluated by this will be considered normal?

**science**

place in order of increaseing nonmettalic character: Se, Po,and O. Can you explain how to do this?

**SCIENCE**

ORDER OF INCREASING ATOMIC SIZE: Cs, Li, and Rb

**calculus II**

Using integration by substitution. find the exact value of integral from [0,9/16] sqrt(1 - sqrt(x))/(sqrt(x))

**Top Schools**

Do what you want. Cause high school gets you into a college you want It depends on what you want to be when you grow up

**physics**

Calculate the difference between the magnitude of the gravitational force and the magnitude of the normal force exerted on a 100 kg object at the equator. Which of the two forces is equal in magnitude to the weight of the object?

**precalc**

Determine whether the sequence is geometric or arithmetic. Then give the general formula for the nth term of the sequence. 6.1, 6.9, 7.7, 8.5, 9.3,... I think it is Geometric, but i don't know how to find the formula

**math**

Is f(x)=4x/x-1 in factored form

**precalc**

Use Sigma Notation to write the sum [10-(1/10)^2]+[10-(2/10)^2]+[10-(3/10)^2]+[10-(4/10)^2]

**3rd grade math**

How can you use mental math to multiply 800 x 5?

**3rd grade math**

Marcia said that if she estimates 73 x7, the product will be less than the exact answer. Is she correct? Explain.

**statistics**

4. Assume you are just planning this survey and want to know how many individuals you have to randomly select to be part of the sample. Assume that the purpose of the study is to calculate a 95% confidence interval for proportion of the adult population who favor lowering the ...

**Economics**

D. (i), (ii), (iii), and (iv)

**precalc/trig**

Find the trigonometric form of the number. (Round any angles to two decimal places.) −8 − i

**MATH**

Y=30X+.25

**art**

hi i am making a comic book for my teacher for a punishment for me and she saaid it has to be funny and i cant think of any thing please help me think of something. thank you

**art**

i need help finding a website showing me some easy to draw abstracks pictures

**physics**

A 6.0 kg mass moves along an inclined plane that makes an angle of 36 degrees with the horizontal. The mass is connected by a cable to a second mass of 10.0 kg, which is suspended over a frictionless, massless, pulley and is free to move. The second mass of 10.0 kg falls at a ...

**calculus**

Determine where the given function is concave up or where it is concave down: f(x)=9x/x^2+49

**HIstory**

How have the lingering influences of the New Left and the cultural radicalism of the 1960s affected both liberal and conservative politics?

**american history**

its d the breakup of the former state of yugoslavia

**physics**

When a 19.9 kg wheel with an angular speed of 3.10 rad/s is disconnected from a motor, a 0.124 N · m frictional torque slows the wheel to a stop. If the wheel has radius of 0.71 m, how long will it take for the wheel to come to rest after being disconnected from the motor?

**physics**

A wheel 80.0 cm in diameter accelerates uniformly from 215 rpm to 360 rpm. If in this process a point on the edge of this wheel have traveled 118 m, how long does this process take?

**math**

jose said all of the multiples of 8 are also multiples of 2. jamila said that all of the multiples of 8 are also multiples of 4. who is correct. Explain

**ratio**

24 people in 6 cars, find the unit rate?

**Physics**

water flows smoothly from the left-hand pipe section (radius 2.00R), through the middle section (radius R), and into the right-hand section (radius 3.00R). The speed of the water in the middle section is 0.460 m/s. What is the net work done on 0.430 m3 of the water as it moves...

**Physics**

Flooded Basement Water is pumped steadily out of a flooded basement at a speed of 5.5 m/s through a uniform hose of radius 0.8 cm. The hose passes out through a window 3.1 m above the waterline. What is the power of the pump?

**music**

i need to do make a presentation on my favourite song how do i do it. my favourite song is moves like jagger

**Chemistry**

Strong base is dissolved in 675 ml of 0.200 m weak acid (ka=3.25x10^-5) to make a buffer with a ph of 3.95. Assume that the volume remains constant when the base is added. HA + OH ---> H2O + A^- calculate the pka value of the acid and determine the number of moles of acid i...

**Chemistry**

What would be the first step of the mechanism in the hydrolysis of SiCl4? I know that SiO2 is formed, but Im confused as to how this would occur.

**Adv. English 9**

for the story Liberty by Julia Alvarez..

**Adv. English 9**

If someone could help me answer any one of these that would be great. :) 1.Name and explain the information provided in the exposition of the story. Then, name the point at which the climax takes place and explain why it is the climax. Finally, tell what is provided in the den...

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