# Posts by m

Total # Posts: 1,327

**Physics**

Two objects A and B are involved in a totally elastic collision The mass of A is 8.8 kg and the mass of B is 0.5 kg. The velocity of A is 4.5 m/s and the velocity of B is 0 m/s. If they collide elastically, what will be the final velocity of A in m/s?

**Physics**

Two balls are involved in a completely inelastic collision. The first ball has a mass of 0.25 kg and an initial velocity of 9.27 m/s in the x-direction The second ball has a mass of 0.50 kg with an initial velocity of 2.61 m/s in the -x-direction. What is the speed of the two ...

**Beginning Spanish-SraJMcGin**

I am sorry I posted this a few moments ago with the wrong name attached at the top I apologize. I had these 2 questions that went with my earlier question. Lee cada situación a continuación y, según el contexto, indica si el se o nos significa each other o...

**beginning spanish-SraJMcGin**

I put at the end that I thought the answers to 1,2,3 were yes and 4 was no

**beginning spanish**

The assignment is to identify if "SE" or "NOS" is next to a REFLEXIVE verb/action (the subject(s) is(are) transmitting the action to himself (each other)) . Lee cada situación a continuación y, según el contexto, indica si el se o nos ...

**Physics**

An airplane flying at 82km/hr at 30 degrees east of north encounters a 40km/hr wind due west. What is the speed of the plane relative to the ground?

**social studies**

Which of the following hispanic countries has suffered an invasion by the U.S.? A) Spain, Argentina, Puerto Rico B) Cuba, Mexico, Nicaragua C) Ecuador, Peru, Colombia I think the answer is B am I correct?

**physics**

a body falls freely from rest

**beginning spanish**

I am to indicate the subject and object of each verb in the sentences. 1. no la quiere para nada. subject- la object- is none 2. lo ve todos los dias. subject- lo object- todos los dias 3. los obedece subject- los object- is none can you tell me if I am correct

**Physics**

A magnetic field is perpendicular to the plane of a single-turn circular coil. The magnitude of the field is changing, so that an emf of 0.63 V and a current of 2.7 A are induced in the coil. The wire is then re-formed into a single-turn square coil, which is used in the same ...

**beginning spanish**

the question is : que estudias? I am to respond that I am a history major. Am I correct to say Estudio historia

**chem ll**

Don't understand where to plug everything in.

**spanish**

te question is Ella se ____ Julia. We were to pick between llama, llamas, and nombre. I think the answer is llama but a little hesitant on that

**Physics (Waves)**

You have 27 tuning forks that oscillate at close but different frequencies. What are the (a) maximum and (b) minimum number of different beat frequencies you can produce by sounding the forks 2 at a time, depending on how the frequencies differ? *I KNOW HOW TO DO B, I GOT THAT...

**science**

My son had this assignment and it is totally confusing to me. This is the info provided: 4.5-V lightbulb and 3 batteries that are 1.5 V each Knowing Ohm's law: voltage (in volts) =current (in amps) x resistance (in ohms) or V=IR. Determine in which circuit the voltage was ...

**physics**

Just as a car tops a 51 meter high hill with a speed of 85 km/h it runs out of gas and coasts from there, without friction or drag. How high, to the nearest meter, will the car coast up the next hill?

**Calculus**

Given: available material= 1200cm^2 Box w/ square base & open top Find: Largest possible value of the box Can anyone give me a detailed, step-by-step explanation for this problem. I'm studying for an exam and have been working on this for awhile. The help would be very ...

**CHemistry Question (pv=nrt)**

How many liters of chlorine gas at 1.00 atm and 20ºC will be required to oxidize 167 grams of bromide ions to molecular bromine? A. 13.5 L B. 25.1 L C. 101 L D. 1.72 L E. 50.3 L

**CHemistry Question**

How many liters of chlorine gas at 1.00 atm and 20ºC will be required to oxidize 167 grams of bromide ions to molecular bromine? A. 13.5 L B. 25.1 L C. 101 L D. 1.72 L E. 50.3 L

**physics**

,,,,,

**Physics (Gravitation)**

In Fig. 13-25, three particles are fixed in place. The mass of B is greater than the mass of C. Can a fourth particle (particle D) be placed somewhere so that the net gravitational force on particle A from particles B, C, and D is zero? If so, in which quadrant should it be ...

**Chemistry Question**

A 500-mL aqueous solution of NaCl was electrolyzed for 15.0 minutes, producing Cl2 gas at the anode. If the pH of the final solution was 12.15, calculate the average current used. (hint: what products are produced at the cathode?) A. 3.8 A B. 2.2 A C. 0.47 A D. 1.4 A E. 0.76 A

**Chemistry Question (oxide acidity)**

Which of the following oxides is the most acidic? A. Al2O3 B. P4O10 C. SO3 D. MgO E. SiO2

**Chemistry Question (currents)**

A 500-mL aqueous solution of NaCl was electrolyzed for 15.0 minutes, producing Cl2 gas at the anode. If the pH of the final solution was 12.15, calculate the average current used. (hint: what products are produced at the cathode?) A. 3.8 A B. 2.2 A C. 0.47 A D. 1.4 A E. 0.76 A

**Chemistry Question (elements)**

Indicate which of the following elements do not exist in nature in the elemental state (that is, they only exist in the combined state of being in compounds with other elements): Cl, K, S, Al, Ar, N A. S, Ar, N B. Ar only C. Cl, K, Al D. Cl only E. Cl, K

**Chemistry Question**

The reaction of quicklime (CaO) with sulfur dioxide (SO2) is an important reaction for reducing SO2 emissions from coal-fired power plants: CaO(s) + SO2(g) → CaSO3(s) This reaction is an example of: A. a precipitation reaction B. an electrolysis reaction C. a combustion ...

**Physics Question (Tension)?**

A solid object can be deformed in three fundamental ways. A roof is held up by support columns inside the building. The deformation of the column caused by the roof is A. Compression and Tension B. Shear C. Bulk

**Statistics Question**

For a test of Ho: p = 0.5, the z test statistic equals 1.52. Find the p-value for Ha: p > 0.5.

**Physics**

In 1980, over San Francisco Bay, a large yo-yo was released from a crane. Suppose the yo-yo was 153 kg, and it consisted of two uniform disks of radius 35.4 cm connected by an axle of radius 3.19 cm. What was the magnitude of the acceleration of the yo-yo during (a) its fall ...

**Physics (Rolling)**

In Fig. 11-35, a solid brass ball of mass m will roll smoothly along a loop-the-loop track when released from rest along the straight section. The circular loop has radius R, and the ball has radius r << R. (a) What is h if the ball is on the verge of leaving the track ...

**Maths**

find s given that v= 20, a= 10, u= 10 and v squared= u squared =2*a*s

**Physics (Rotation)**

In Fig. 10-28, wheel A of radius rA is coupled by belt B to wheel C of radius rC. The angular speed of wheel A is increased from rest at a constant rate α. Find the time needed for wheel C to reach angular speed ω assuming the belt does not slip. (Hint: If the belt ...

**Chem Question (thermo)**

Calculate ΔG at 25 ºC for a reaction in which Ca2+(aq) combines with CO32–(aq) to form a precipitate of CaCO3(s) if the concentrations of Ca2+(aq) and CO32–(aq) are 0.023 M and 0.13 M, respectively. (ΔGº = –47.94 kJ) A. –62.3 kJ/mol B...

**Chem (Thermodynamics)**

I got "B". Can anyone verify?

**Chem (Thermodynamics)**

The standard molar enthalpy of fusion and the standard molar enthalpy of vaporization of benzene are 10.9 kJ/mol and 31.0 kJ/mol, respectively. Calculate the standard molar entropy changes for the solid ↔ liquid and liquid ↔ vapor transitions for benzene. At 1 atm ...

**Chem (electronegativity)**

Calculate the E°cell for the following voltaic cell (use the standard electrode potentials given on page 829 of the textbook, or from some other source): Ni(s) + 2 Ag+(aq) → Ni2+(aq) + 2Ag(s) ====================== I got -0.55 as my answer. Ecell is Ecath-Eanod The ...

**Chem (Thermodynamics)**

Ok thanks!

**Chem (Thermodynamics)**

Ok for dHorxn I got 62.1kJ for dSorxn I got 132.7JK I did 62.1kJ x1000 to make it JK units too. So i got 0=62100-(T)(132.7) so T = 195degrees right?

**Chem (Thermodynamics)**

Calculate the temperature (in ºC) to which silver ore, Ag2O, must be heated to spontaneously decompose the ore to oxygen gas and solid silver metal at standard state. (ΔHºf of Ag2O(s) = –31.05 kJ/mol; Sº values: Ag(s), 42.55 J/mol•K; O2(g), 205.1 ...

**Math**

Explain in writting how to divide .12 by 8. (without using fractions) fifth grade

**Chem (Thermodynamics)**

Calculate the temperature (in ºC) to which silver ore, Ag2O, must be heated to spontaneously decompose the ore to oxygen gas and solid silver metal at standard state. (ΔHºf of Ag2O(s) = –31.05 kJ/mol; Sº values: Ag(s), 42.55 J/mol•K; O2(g), 205.1 ...

**history**

I have an assignment about the American Revolutionary War. I have to Select three major periods of the Revolutionary War to use as points of comparison showing how the war was experienced in the northern theater with how it was experienced in the southern theater during these ...

**ELA**

Write the unstressed syllable beside each word worship ship pilgrim grim repair re distance tance carrot rot entry try destroy des forbid bid hidden den dozen zen

**chemestry**

if 40 grams of water are produced when 30 grams of ethane is burned what is the % yields

**Intermediate Algebra**

The perimeter of a triangle is 48 centimeters. The longest side is 2 centimeters less than the longest side. Find the lengths of each side of the triangle.

**Shurley English**

How would you label sting in "Ouch, that bee sting hurts."

**college algebra**

By completing square, f(x) = 3[x^2 -2x - 7/3] = 3[x^2 - 2(x)(1) + (1)^2 - (1)^1 - 7/3] = 3[(x - 1)^2 - 1 - 7/3] = 3(x - 1)^2 - 3 - 7 = 3(x - 1)^2 - 10

**English**

when you get the answers, please put them here!

**english**

i would say the teacher, mr.bixby,mother,and mss. flowers

**6th grade math-ms. sue**

MS. Sue here is exactly what the paper says- think back to the experiment you just designed to test the Best Wheels Bike Shop's new super titanium wheel bearings. Can you be sure that your results are due to the new bearings and not something else? That depends on how you ...

**6th grade math**

My son has this homework and I am all confused... the paper says to think back to the experiment you just designed to test the Best Wheels Bike Shop's new super titanium wheel bearings. He did not do this experiment which leads me to believe this is just a statement for ...

**government**

I have to explain how American Association for Affirmative Action influences public policy. I still get confused on public policy but so far I believe the answer is this group influences public policy through affirmative action policies for women, minorities, etc. that ...

**Physics**

280 Pa

**government**

In my class I had to choose a major national issue and identify the forces in a political party that help drive the party to its position on the issue. I chose education and the Democratic party. The driving forces part is where I am stumped. I figured the forces would be ...

**government MS. Sue please**

Ms. Sue, Could you double check these, I asked you earlier and got the ball rolling. I had to choose five interests that are affecrted by public policy decisions. I chose No Child Left Behind, Health care insurance, environmental safety, veterans groups, and gun safety. What I...

**government**

I have to make a chart that shows five interests that are affected by public policy decisions. I am not 100% sure on this and did post earlier to which Ms. Sue graciously told me my 2 originals were ok. I have figured out these 5 but want to make sure they are interests that ...

**government**

I have to make a chart that shows five interests that are affected by public policy decisions. I am not 100% sure on this but could No Child Left Behind, and Environmental safety (like the oil spill that just happened in the gulf)?

**PLEASE HELP-PHYSICS HW**

A 130 kg astronaut (including space suit) acquires a speed of 2.80 m/s by pushing off with his legs from an 2000 kg space capsule. What is the change in speed of the space capsule? As the reference frame, use the position of the space capsule before the push. If the push lasts...

**Algebra**

12

**algebra**

what does the a stand for in Pa^t what does the r stand for in Pe^rt how are they related?

**english llit**

I am still trying to figure out the meter in the poem On the Amtrak from Boston to New York City. Looking at the types of meter I narrowed it down to iambic pentameter and anapestic. I thought the meter was anapestic because of the 2 unaccented syllables followe by 1 accented ...

**english lit**

I am writing a paper on "On the Amtrak from boston to new york city" by sherman alexie. I need to detail how the poet used literary conventions and poetic devices such as meter, imagery, and symbolism to communicate the meaning of the poem. I have the imagery and ...

**Chemistry**

Kate's (a) and (b) are correct, but (c) is incorrect. 6.00 M NaOH = (0.325 mol NaOH) / (mL NaOH) mL NaOH = (0.325 mol NaOH) / (6.00 M NaOH) With correct significant figures, the answer to (c) is 54.2 mL.

**bio270**

a. downward deflection b. upward deflection c. no deflection d. up then down deflections e. down then up deflections

**bio270**

In an electrocardiograph a wave of sustained depolarization moving towards a negative electrode will produce:

**physics**

Average destance between Earth and the moon is 384 790 km. How many days would it take sound to travel to the moon?

**physics**

Vibration of the dishwasher causes standing waves in a cup. crests form four concentric rings and the diameter of the cup is 6.0cm v=1.5m/x . What is the frequency of the vibrations?

**trig**

Y

**math**

Keno is a casino game in which the player has a card with the numbers 1 through 80 on it. The player selects a set of k numbers from the card, where k can range from one to fifteen. The "caller" announces twenty winning numbers, chosen at random from the eighty. the ...

**math**

My son is doing this in 6th grade math class. Mr. Weiss started painting the kitchen at 8:45 am and finished painting at 12:00 pm. About how many hours elapsed between the time he started painting and the time he finished painting the kitchen? Answers are 2h, 3h, 4h, and 5h. ...

**history**

I am helping my son who is in the 6th grade. He has a crossword puzzle that relates to early civilization and the clue is different. We have this much so far ???e??? for a total of 7 letters with an e in the middle please help.

**physics**

+ 8 going with wind - 4 against the wind -4+8/2 = 2 is the average speed

**Chemistry**

Thank you so much drbob! Your explanation make sense! :D

**precalc**

find two functions f and g such that (f+g)(x) = 5 and domain of f + g is [0, infinity)

**math**

use intermediate value theorem to show f(x) has a zero f(x)= x^5 - 4x^4- 7x^2 - 6x; [-0.7, -0.6]

**math**

use intermediate value theorem to show f(x) has a zero f(x)= x^5 - 4x^4- 7x^2 - 6x; [-0.7, -0.6]

**pre calculus**

given points (0,0) (0,5) vertical asymptote of (-1,1) and horiz (2,1) how do I find the equation??????

**pre calculus**

solve in real number system x^3 + 5x^2 - 12x = 14 =0

**pre calculus**

find the bounds on the real zeros????? f(x) = x^5 - 5x^4 +8x + 2

**Calculus**

use the intermediate value theorem to determine whether there is a zero f(x) = -3^3 - 6x^2 + 10x + 9 ; [-1,0]

**precalc**

convert into equation with 0 on right hand side sq route (x+6) = 6-2 sq route (5-x)

**chemistry**

S2(s)+H2(g)=H2S(g)

**algebra 2**

i need help solving these inequalities i'm not sure if i should factor things out or not 4x^3 is greater than or equal to 16x and 4 is greater than or equal to 2x^3 + 8x

**Physics**

99.48 km/h

**4th grade math**

the answer is 1232 as two of the digits should be same also

**statistics**

0.9

**Chemistry**

oh ok thanks i got .09 i hope that's right

**Chemistry**

The question said to use dimensional analysis...

**Chemistry**

(0.75 moles Al(NO3)3/L Al(NO3)3) x 0.040 L Al(NO3)3 = ??moles Al(NO3)3 I am unsure how to find the factor to convert moles Al(NO3)3 into moles NO3. i think that if i do the first section, you get .03 moles as your answer for moles of Al(NO3)3, but I am not sure. how can i ...

**chemistry**

use dimensional analysis to find how many moles of nitrate ions are in 40.0 mL of a 0.75 M aqueous solution of aluminum nitrate

**geometry**

If CD is parallel to AD, then CD meets AD at D. But parallel lines never meet!

**Bunn high**

Y=1/2x-14

**physics**

A 1,200-kg car runs into the rear of an 1,800-kg minivan that was moving at 6 m/s. The two vehicles are locked together after the collision and move with a speed of 12 m/s. How high above the ground would the locked- together vehicles have to be raised in order for their ...

**psychology**

use the book

**MATH**

(1/6)to the power of 3x = 36 to the power of 2-x

**MATH**

What is the 9th term -1/18 1/6 -1/2

**MATH**

Convert 322 degrees to radians

**College algebra**

At least, from the sign of a, one can tell whether it is concave upward or downward a>0 => concave upward.

**science**

4. Why do we tend to assume that natural chemicals are safe while industrial chemicals are evil? Is this correct?

**english**

I have been working on this and am still confused. Which sentence is correct. Using the pronoun case- A) My brother knows more about technology than me. B) My brother knows more about technology than I. I thought it would be best for B and add to it the word do at the end but ...