Wednesday

April 16, 2014

April 16, 2014

Total # Posts: 2,655

**physics**

Two liters of nitrogen combine with 6 L of hydrogen to form 4 L of ammonia. If the molecules of nitrogen and hydrogen have two atoms each, how many atoms of hydrogen and nitrogen are there in one molecule of ammonia?

**physics**

The pressure in each of your car tires is 1.80 105 Pa. The mass of your car is 1660 kg. Assuming that each of your tires bears one-quarter of the total load, what is the contact area of each tire with the road?

**physics**

A plane flies due north (90° from east) with a velocity of 100 km/h for 3 hours. During this time, a steady wind blows southeast at 30 km/h at an angle of 315° from due east. After 3 hours, where will the plane’s position be relative to its starting point? Show yo...

**physics**

A plane flies due north (90° from east) with a velocity of 100 km/h for 3 hours. During this time, a steady wind blows southeast at 30 km/h at an angle of 315° from due east. After 3 hours, where will the plane’s position be relative to its starting point? Show yo...

**physics**

1. A man pulls a crate with a rope. The crate slides along the floor in the horizontal direction (x direction). The man exerts a force of 50 N on the rope, and the rope is at an angle q. Describe how the force components (Fx, Fy) change as the angle increases from 0° to 90...

**physics**

3. You travel from New Orleans, Louisiana, with the following vectors: • New Orleans à Point A: q = 180°, Δd = 483 km • Point A à Point B: q = 106°, Δd = 347 km • Point B à Point C: q = 106°, Δd = 347 km Remember: ...

**Physics**

A plane flies due north (90° from east) with a velocity of 100 km/h for 3 hours. During this time, a steady wind blows southeast at 30 km/h at an angle of 315° from due east. After 3 hours, where will the plane’s position be relative to its starting point? Show yo...

**Physics**

Two spheres of equal mass are thrown against a wall with equal velocities. One sphere rebounds with 75% of its original speed, while the other sticks to the wall. Which imparted a greater impulse to the wall, the sticky ball or the rebounding ball? Justify your answer.

**Physics**

A 400 gram block slides down a 30 degree incline from rest and reaches the bottom with a speed of 4.50 m/s. If the height through which the block falls is 2.0 meters, find the average frictional force that acted on the block.

**Physics**

A liquid of density 1.23 × 103 kg/m3 flows steadily through a pipe of varying diameter and height. At location 1 along the pipe the flow speed is 9.23 m/s and the pipe diameter is 1.07 × 101 cm. At location 2 the pipe diameter is 1.71 × 101 cm. At location 1 ...

**Spanish**

Can someone review my answers please 1. Alfredo dice que el viejo auto de Marisol todavía__ (ser/estar) seguro. Marisol piensa que quiere un auto nuevo pero no___ (ser/estar) segura. 2. Marta _____ (ser/estar) aburrida de pasar seis horas en la biblioteca. 3. Ella piens...

**history**

Thank you!

**history**

In the election of 1912, Teddy Roosevelt's Bull Moose Party platform was built around what he called the A. New Freedom. B.(New Nationalism). C. Square Deal. D. Fair Deal. Correct?

**math**

800

**literature**

what is the purpose of the odan tree in nigeria

**Calculus-Applied Optimization Problem**

If a total of 1900 square centimeters of material is to be used to make a box with a square base and an open top, find the largest possible volume of such a box.

**Chemistry**

Ok I thought that before I submitted the question but I thought that seemed too easy! That you so much for your help though :)

**Chemistry**

well i got 5 for the first part but I thought that the delta E was the same for both because the wavelengths were pretty much the same, so i got 1 as the final but thats only because that made both of the equations exactly the same

**Chemistry**

A ground state hydrogen atom absorbs a photon of light having a wavelength of 94.96 nm. It then gives off a photon having a wavelength of 95 nm. What is the final state of the hydrogen atom? I think I got 5 for an answer, but I am not sure if I did this right or not

**Chem**

ok, i think i got 5 for an answer do you think this is correct??

**Chem**

A ground state hydrogen atom absorbs a photon of light having a wavelength of 94.96 nm. It then gives off a photon having a wavelength of 95 nm. What is the final state of the hydrogen atom?

**Spanish**

I wanted to know if i used the right verbs Complete the sentences with the correct forms of conseguir, ir, pensar, querer, or suponer. 1. Nosotros (blank) de excursión a las montañas, Toño. 2. ¡Yo (blank) que vas a dormir todo el fin de semana! 3. No...

**Spanish**

I need help to revise these sentences, thanks Form complete sentences using the verbs and nouns provided. Add any other necessary words. 1. María Elena / mostrar / fotos / a sus amigas 2.Martín y su hermano / empezar / lecciones de natación / martes 3. Adr...

**Spanish**

I need someone to heck if this is correct Complete each sentence with the conjugated yo forms of the verbs in the word bank. hacer poner salir suponer traer 1. Todos los días salgo___ de la universidad a las tres y voy a casa. 2. Llego a mi casa a las cuatro y_pongo__ l...

**math**

what type of numbers is found an odd number of times in the table

**math**

what type of numbers is found an odd number of times in the table from 1 to 9?

**Counting and probability **

I have no idea on how to do this, please help! Maya is invited to a wedding. She's gets all the items (dress pants, shoes, necklaces and a scarf) she finds suitable to wear out of her closet. A) Maya has two dress pants and four blouses. how many outfits does she have cons...

**physics**

a plane flies due north at 225km/h. a wind blows it due east at 55km/h. what is the magnitude and direction of the plane's resultant velocity?

**physics**

a plane flies due north at 225km/h. a wind blows it due east at 55km/h. what is the magnitude and direction of the plane's resultant velocity?

**math**

A painter leans a 15 foot ladder against the side of a house. The top of the ladder touches the house at a height that is 3 feet more than the distance from the house to the bottom of the ladder. How far is the bottom of the ladder from the house?

**english**

1. Which of the following sentences is correctly punctuated? A. The local police asked the F.B.I. to assist with the case. (B). Mr. Jones visited the YMCA before becoming a member. C. Mary remembered to buy milk didn't she? D. The company held it's annual party at the ...

**Physics**

The systems shown below are in equilibrium (with m = 4.80 kg and θ = 27.0°). If the spring scales are calibrated in newtons, what do they read? Ignore the masses of the pulleys and strings and assume the pulleys and the incline are frictionless. scale in (c) scale in ...

**Math (Algebra 2)**

Source: At the end of 1993, scientists tracked 1550 nonfunctional components in orbit and projected 42 such objects are added each year. Suppose that an average of 15 of these are brought back to Earth each year. Question: Write the function "R" that models the total...

**math**

16+9=25 Answer is 9

**physics**

A baseball player slams a fastball towards left field. The ball is hit 1.00 m above the plate at an initial velocity of 36.0 m/s at a 30 degree angle above the horizontal. The left field wall is 113 m away and is 3.00 m high. Is this a home run shot or not?.

**physics**

A baseball player slams a fastball towards left field. The ball is hit 1.00 m above the plate at an initial velocity of 3.0 m/s at a 30 degree angle above the horizontal. The left field wall is 113 m away and is 3.00 m high. Is this a home run shot or not?.

**math**

Find two numbers the exact answer is between 6 x 7,381

**U.S hISTORY**

WHAT TWO SOLUTIONS DID EFFICIENCY PROGRESSIVES OFFER TO MAKE CITY GOVERNMENT MORE EFFICIENT

**english**

Write the verb "see" in the present perfect tense. Use the pronoun "I" as the subject.? A. I have seen. B. I am seen. C. I am seeing. is it C?

**Physics**

A vector has an x-component of −25.5 units and a y-component of 56.0 units. Find the magnitude and direction of the vector.Direction ° (counterclockwise from the +x-axis)

**Physics**

Vector A has a magnitude of 29 units and points in the positive y-direction. When vector B is added to A, the resultant vector A + B points in the negative y-direction with a magnitude of 15 units. Find the magnitude and direction of B?

**Physics**

Vector A has a magnitude of 29 units and points in the positive y-direction. When vector B is added to A, the resultant vector A + B points in the negative y-direction with a magnitude of 15 units. Find the magnitude and direction of B?

**EKG**

This is a true and false question: 1. Patient motion my create artifact that looks like an atriall arhythmia. 2. The ECG tracing represents a 3 dimensional view of the heart's electric activity.

**Consumer Math: Insurance**

Choose as many answers as apply. Which of the following statements are true of ordinary whole-life insurance policies? A. The insured pays premiums on this type of insurance until his death. B. Ordinary whole life insurance covers the insured for the stated term of the policy....

**Anatomy Physiology 1**

1) How would the effects of a collagen vascular disease that affected only the collagen in reticular fibers differ from the effects of collagen fibers on organs & tissues? 2) Does fibrocartilage provide an articular surface as smooth as original hyaline cartilage? Why or why not?

**Math**

On May 23, Samantha Best borrowed $40,000 from the Tri City Credit Union at 13% for 160 days. The credit union uses the exact interest method. What was the amount of interest on the loan? Using the scenario from the previous question, calculate the maturity value of the loan. ...

**physics**

A ball is thrown directly downward with an initial speed of 7.00 m/s, from a height of 30.4 m. After what time interval does it strike the ground?

**math**

Find and Interpret the median and the interquartile range for each distribution. The median: 31. Here's the set of numbers: 10, 13, 14, 15, 16, 17, 18, 20, 21, 22, 23, 23, 24, 25, 27, 31, 34, 34, 35, 35, 36, 37, 38, 39, 39, 41, 43, 44, 45, 48, 49, 62, 73

**Physics**

A model rocket is launched straight upward with an install speed of 57.6 m/s. it accelerates with a constant upward acceleration of 1.70m/s^2 until its engines stop at an altitude of 240m. A. What is the maximum height reached by the rocket? The acceleration of gravity is 9.81...

**Physics**

A steam catapult launches a jet aircraft from the aircraft carrier John C. Stennis, giving it a speed of 190 mi/h in 2.70 s. a.) Find the average acceleration of the plane. b.) Assuming the acceleration is constant, find the distance the plane moves.

**Math 4th grade **

Write the word form and tell the value of the underline digit for each number 488, 423, 046

**Spanish 2**

Give both the affirmative and negative "tú" commands for each of the following verbs. poner

**Economics**

Explain the statement “scarcity may be the single most significant word in the field of economics.”

**Physics (Kinematics)**

An airplane accelerates down a runway at 100 m/s2 for 15 s until it finally lifts off the ground. Determine the distance traveled before take-off.

**Physics (Kinematics)**

A car starts from rest and accelerates uniformly for 10 seconds over a distance of 200 m. Determine the acceleration of the car.

**Physics (Kinematics)**

A race car accelerates uniformly from 10 m/s to 50 m/s in 2 seconds. Determine the acceleration of the car and the distance traveled.

**veterinary technician**

1. in the keyword search on EDSeek's home page, enter the following statements: NASA* AND Mars*. based on the results from this search, choose the best answer to this question. which of the following is not a listed document type? A:diary B:book review C:report D:article

**veterinary technician**

which one of the following practices is allowed under copyright law?

**Math**

2000+500 or two thousand five houndred sorry its spelled wrong.

**Chemistry**

Butyric acid (HC4H7O2) is a weak acid with the stench of rancid butter 1.) write the equation for the dissociation of HC4H7O2 in water 2.)the pH of .5 M HC4H7O2 is 2.56 calculate Ka of butyric acid 3.) Write the equation for the hydrolysis of C4H7O2- 4.) Calculate Kb for C4H7O...

**algebra **

Marcus has 72 feet of fencing. He wants to build a rectangular pen with the largest possible area. What should the dimensions of the rectangular pen be to maximize the area?

**english**

ideas on the subject of sharing a car with a sibling.

**english**

1. Choose the answer that displays the correct spelling of the plural form of the words in parentheses. How many (praying mantis) will we have to import to fight the (grasshopper)? 2. Choose the answer that displays the correct spelling of the plural form of the words in paren...

**ALGEBRA**

A satalites escape velocity is 6.5 mi/sec, the radius of the earth is 3960 miles and the earth's gravitational constant(g) is 32.2 ft/sec^2 How far is the satelite from the surface of the earth?

**physics**

A rescue helicopter is lifting a man (weight = 925 N) from a capsized boat by means of a cable and harness. (a) What is the tension in the cable when the man is given an initial upward acceleration of 2.59 m/s2? (b) What is the tension during the remainder of the rescue when h...

**Chemistry**

Please help in any way that you can. Very small spherical crystals called quantum dots are being investigated for use in electronic devices. a. Calculate the mass of a quantum dot of pure silicon that has a diameter of 4nm. b. If you made a 3.5nm diameter quantum dot of pure g...

**Chemistry (How do I calculate) **

Calculate the Molar Enthalpy of Neutralization (ΔHn) in kJ/mol of the reaction between a monoprotic acid and a monoprotic base, given the following information: The temperature change equals 6.92°C, 50.0 mL of 1.00 M concentration of Acid 50.0 mL of 1.00 M concentrati...

**physics**

what is the potential energy of a 500g flag at the top of a 5.5m tall flag

**physics**

a box of mass 5.7 kg slides across a floor and comes to a complete stop. if its initial speed was 10km/h and mu = 0.34 find the acceleration of the box

**physics**

a car of mass 2000kg has a driving force of 4500N and experiences an air resistance of 1500N, What is the car's acceleration??

**How do I solve for this??**

How much heat (in Joules) is gained by the water when a chemical reaction takes place in 100.0 ml aqueous solution, has a temperature increase of 12.67°C and a specific heat capacity of 4.180 J/°Cg? [Hint: ignore any effects of the calorimeter and solve for qwater]

**Please help me solve **

How much heat (in Joules) is gained by the water when a chemical reaction takes place in 100.0 ml aqueous solution, has a temperature increase of 12.67°C and a specific heat capacity of 4.180 J/°Cg? [Hint: ignore any effects of the calorimeter and solve for qwater]

**Please help me solve **

How much heat is absorbed by the calorimeter (qcal) if the temperature is increased 12.4 °C and the calorimeter constant (Ccal) is 3.30 J/°C?

**Chemistry **

How much heat is absorbed by the calorimeter (qcal) if the temperature is increased 12.4 °C and the calorimeter constant (Ccal) is 3.30 J/°C?

**Chemistry **

How do I solve this? How much heat (in Joules) is gained by the water when a chemical reaction takes place in 100.0 ml aqueous solution, has a temperature increase of 12.67°C and a specific heat capacity of 4.180 J/°Cg? [Hint: ignore any effects of the calorimeter and ...

**Chemistry**

Sorry I forgot the rest of the equation What mass of silver chloride can be prepared by the reaction of 160.0 mL of 0.26 M silver nitrate with 150.0 m? Calculate the concentrations of each ion remaining in solution after precipitation is complete. (Enter a 0 if none of the ion...

**Chemistry **

Please please help me on this equation I'm stuck and your steps are confusing. Calculate the concentrations of each ion remaining in solution after precipitation is complete. (Enter a 0 if none of the ion remains.) Cl ‾ Ca2+ I have Ag+=0 and NO3^-3= 0.13 but I can...

**Chemistry**

I have 0.400*0.13=5.2 so far What's next? What volume of 0.300 M Na3PO4 is required to precipitate all the lead(II) ions from 130.0 mL of 0.400 M Pb(NO3)2?

**Chemistry(steps check) **

I figured out the NO3- which is 0.13, I'm stuck on the Cl- I have 0.24*2-0.0416= 0.4384 but I'm being told that's wrong What mass of silver chloride can be prepared by the reaction of 160.0 mL of 0.26 M silver nitrate with 150.0 mL of 0.24 M calcium chloride? Cl &...

**Chemistry**

What's next?

**Chemistry**

I don't understand your steps if you can type them clearly that would be great, so far I have 0.400*0.13=5.2

**Chemistry **

What volume of 0.300 M Na3PO4 is required to precipitate all the lead(II) ions from 130.0 mL of 0.400 M Pb(NO3)2? Can you please show the steps I have no idea how to solve

**Chemistry**

I have 0.400*0.13=5.2 so far

**Chemistry **

What volume of 0.300 M Na3PO4 is required to precipitate all the lead(II) ions from 130.0 mL of 0.400 M Pb(NO3)2?

**Chemistry help**

I figured out the NO3-, I'm stuck on the Cl- I have 0.24*2-0.0416= 0.4384 but I'm being told that's wrong

**Chemistry help **

What mass of silver chloride can be prepared by the reaction of 160.0 mL of 0.26 M silver nitrate with 150.0 mL of 0.24 M calcium chloride? Also, Calculate the concentrations of each ion remaining in solution after precipitation is complete. Cl ‾ NO3‾ Ca2+

**Chemistry please help **

I can't find the answer of A 0.1052 g sample of copper metal is dissolved in 55 mL of concentrated HNO3 to form Cu2+ ions and then water is added to make a total volume of 208.5 mL. (Calculate the molarity of Cu2+.) I calculated 0.1052*63.546/6.022e23/0.2085 but webassign ...

**Chemistry(Answer check) **

A 0.1052 g sample of copper metal is dissolved in 55 mL of concentrated HNO3 to form Cu2+ ions and then water is added to make a total volume of 208.5 mL. (Calculate the molarity of Cu2+.) 0.1052g*63.546/6.022e23 did I set it up right?

**Chemistry **

A 0.1052 g sample of copper metal is dissolved in 55 mL of concentrated HNO3 to form Cu2+ ions and then water is added to make a total volume of 208.5 mL. (Calculate the molarity of Cu2+.)

**Chemistry **

A 230.-mL sample of a 0.280 M CaCl2 solution is left on a hot plate overnight; the following morning, the solution is 1.10 M. What volume of water evaporated from the 0.280 M CaCl2 solution?

**Chemistry **

What mass of silver chloride can be prepared by the reaction of 160.0 mL of 0.26 M silver nitrate with 150.0 mL of 0.24 M calcium chloride? Also, Calculate the concentrations of each ion remaining in solution after precipitation is complete. Cl ‾ NO3‾ Ca2+

**Chemistry **

A 0.1052 g sample of copper metal is dissolved in 55 mL of concentrated HNO3 to form Cu2+ ions and then water is added to make a total volume of 208.5 mL. (Calculate the molarity of Cu2+.)

**Chemistry **

Please help me what is the ionic equation for AgNO3(aq) + Na3PO4(aq)? Not sure what I'm doing wrong here is what I have so far 3Na^+(aq) + PO_4^-3(aq) + 3Ag^+(aq) +3NO^3-(aq) --> 3Na^+(aq) + 3NO^3-(aq) + Ag_3PO_4(s)

**Chemistry**

I'm not sure what I'm doing wrong it still says oxidation state is improper and no the spaces do not matter

**Chemistry **

What is the complete ionic equation for NaOH(aq) + Fe(NO3)3(aq)? I'm putting this on webassign, but it's telling me "One or more of your reactants appear to have an improper oxidation state. One or more of your products contains an improper oxidation state. 3Na^+ ...

**Math **

Please please help!!!!! Solve the inequality and write the solution set in interval notation 4x^3 -6x^2<0 2x^2 (2x-3)<0 2x-3<0 x= 3/2 Now I'm not sure about this 2x^2<0 x^2<1/2 sq root of x^2<sq root of 1/2 x=.7071 Right? When I plug it in the calculator ...

**calculus **

In the computer game, there must be a ramp that is 2 m wide, with height 3 m and length. 5 m. Assume that one corner of the bottom of the ramp is at the origin.

**Employment Law (HRM300)**

I am having trouble finding Court Case Influential to Establishment of Law for: The Equal Pay Act Age Discrimination in Employment Act(1967) Civil Rights Act of 1991 Family and Medical Leave Act of 1993 Privacy Act of 1974 I have found cases that involve the above laws, but no...

**Physics**

A block of weight 30N lies on a horizontal table top. A force of 40N acts parallel to the surface of the table top, but does not cause the block to move. What is the magnitude of the frictional force between the block and the table?

**physics**

A ball is released from a tower at a height of 100 meters toward the roof of another tower that is 25 meters high. The horizontal distance between the two towers is 20 meters. With what horizontal velocity should the ball be imparted so that it lands on the rooftop of the seco...

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