# Posts by joseph

Total # Posts: 587

**physics**

the length of an aluminum is 76.5cm and that of an iron ruler is 80cm at 0¡ãc. at what temperature will the length of the rules become equal

**uniben/physics**

the length of an aluminum is 76.5cm and that of an iron ruler is 80cm at 0¡ãc. at what temperature will the length of the rules become equal

**prob&stat**

Both answers of 0.4735 and 0.3686 are wrong. We got 768 cases, 0.3836, still wrong.

**science**

Net force of 10 newton produces an acceleration of 2mts/sec2 in a body moving over a horizontal surface . What is the mass of the body

**Adjective**

On number one is some an adjective because it's describing sense? Thank you

**Adjective**

For number 3 the adjective is three sided and wooden? 4)simple and unusual? 5)unlimited? 6) much and first?

**Adjective**

Please tell me the adjectives in the following sentences. 1)She was blind and deaf but had some sense of touch. 2)Samuel Howe had helped countless handicapped people at Perkins inst. 3) he used unique three sided wooden letters to teach Laura words 4) others doubted whether ...

**Chemistry**

How energy is needed to vaporize 100 g of ethanol from its boiling point?

**chemistry**

TWO IDENTICAL mano METERS ARE FILLED WITH MERCURY. THE mano METERS ARE PLACED IN A CLOSED PRESSURIZED BOX CONTAINING AIR AT 1,000 TORR PRESSURE. ONE manometer CONTAINS GAS a, AND THE OTHER GAS B. WHAT IS THE DIFFERENCE BETWEEN THE PRESSURES OF THE TWO GASES? THE DENSITY IS 13....

**CHEMISTRTY**

i meant manometer

**CHEMISTRTY**

yes

**CHEMISTRTY**

TWO IDENTICAL NANO METERS ARE FILLED WITH MERCURY. THE NANO METERS ARE PLACED IN A CLOSED PRESSURIZED BOX CONTAINING AIR AT 1,000 TORR PRESSURE. ONE NANO-METER CONTAINS GAS a, AND THE OTHER GAS B. WHAT IS THE DIFFERENCE BETWEEN THE PRESSURES OF THE TWO GASES? THE DENSITY IS 13...

**CHEMISTRTY**

IF CO2 TRAVELS 20.5 CM DOWN A 46.0 CM GLASS TUBE IN 1.3*10^4 AS IN THE GRAHAMS LAW EXPERIMENT, THEN COLLIDES WITH ANOTHER GAS. WHAT IS THE MOLECULAR MASS OF THE SECOND GAS?

**physics**

What fraction of the volume of the ball is below the waterline?

**Physic**

a.) Having decay constant as t=0.693/decay constant. Therefore decay constant=0.693/t (i.e time). Decay constant=0.693/30 =0.02

**chemistry**

An optically active compound A, C6H10O2, when dissolved in NaOH solution, consumed one equivalent of base. On acidification, compound A was slowly regenerated. Treatment of A with LiAlH4 in ether followed by protonolysis gave an optically inactive compound B that reacted with ...

**Calculus**

A rectangular storage container with an open top is to have a volume of k cubic meters. The length of its base is twice its width. The material for the base costs $6 per square meters and the material for the sides costs $10 per square meter.

**genetics**

C. synthesis of oligonucleotide primers

**chemistry**

Calculate ▲U,▲H, ▲S, ▲A and▲G in expanding 1 mole of ideal gas at 25 ° c from 10 to 100 dm cubed. (5marks )

**chemistry**

Distinguish clearly between ▲G for a reaction and ▲S of the same reaction. Which of the two is used to predict whether a reaction is spontaneous? why? (4 marks)

**Inorganic Chemistry**

Which of the following species contain an inversion center? Choose all that apply. SeF6 [IF4]- SnF4 InH3

**Inorganic Chemistry**

Which of the following molecules contain a C3 axis but not a σh plane? AlCl3 SeO3 SbBr3 PCl3

**Inorganic Chemistry**

Which of the following species contain a C4 axis and a σh plane? Choose all that apply. [ICl4]- SiCl4 XeF4 GeH4 [PO4]3

**Earth Science**

Top carnivore in a food chain

**math**

Juanita wants to give bags of stickers to her friends. she wants to give the same number of stickers to each friend. she's not sure if she needs 4 bags or 6 bags of stickers. How many stickers could she buy so there are no stickers left over.

**Science**

Which of the following is an indication that a planet may exist near a distant star A. the star varies in temperature B. The star has a very slight back and forth motion C. the star has very strong gravity D. Radio wave activity increases near the star I think the answer is A

**Computers**

thank you I hope it is correct

**Computers**

my answer is also B

**Computers**

What is one important feature of an AUP? A. a list of all available courses B. a clear outline of the consequences of violating the policy C. a permissive approach to internet usage D. a calendar for the academic year

**organic chemistry**

Provide a structure for the following compound: C9H10O3; IR: 2400–3200, 1700, 1630 cm–1; 1H NMR: δ 1.53 (3H, t, J = 8 Hz); δ 4.32 (2H, q, J = 8 Hz); δ 7.08, δ 8.13 (4H, pair of leaning doublets, J = 10 Hz); δ 10 (1H, broad, disappears with ...

**organic chemistry**

Provide a structure for the following compound: C9H10O3; IR: 2400–3200, 1700, 1630 cm–1; 1H NMR: δ 1.53 (3H, t, J = 8 Hz); δ 4.32 (2H, q, J = 8 Hz); δ 7.08, δ 8.13 (4H, pair of leaning doublets, J = 10 Hz); δ 10 (1H, broad, disappears with ...

**chemistry**

suppose 0.0139g of HNO3 is dissolved in 625 mL of aqueous solution. what is the pH

**math**

A coin is tossed 3 times. Find the probability that all the 3 are heads (A) if it is known that the first is heads (B) if it is known that the first 2 are heads (C) if it is known that the 2 of them are heads

**statistics**

A coin is tossed 3 times. Find the probability that all the 3 are heads (A) if it is known that the first is heads (B) if it is known that the first 2 are heads (C) if it is known that the 2 of them are heads

**Organic Chemistry TLC Chromatography**

If you have 5.6 ml of 95:5 ethyl acetate, how many ml of 85:15 ethyl acetate can you make? Assume unlimited supply of pure ethyl acetate.

**social studies**

the mediterranean sea

**mathematic**

a bag contains 3rdmarbles, 2white and 3green a boy takes at one marble at random. what is the prob that it is either red or white?

**maths..g.p**

kde

**Algebra**

Tell whether the statement is always, sometimes or never true. Nine Students choose integers. seven of them are -16, 12, -13, -6, -5, 6 an 1

**grocery eater**

1-800-EAT HER OUT

**band essay?**

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**Chemistry**

How many resonance structures do these following acids have? H2CO3-carbonic acid H3PO4-phosphoric acid H2SO4-sulfuric acid HNO3-nitric acid CH3COOH- acetic acid CH2ClCOOH- chloroacetic acid CHCl2COOH- dichloroacetic acid CCl3COOH- trichloroacetic acid

**Chemistry**

Calculate the volume of 1.00 M acetic acid solution and mass of sodium acetate needed to make 250 mL of a 0.450 M acetic acid/acetate buffer solution with a pH of 4.00. (The pKa is 4.74 for acetic acid) *Please explain it in detail, don't leave a step out! Thank You!

**Math**

Find the linear approximation of f(x)=ln x at x=1 and use it to estimate ln 1.12. L(x)= ? ln 1.12 \approx ?

**calculus**

i got maximum to be -¼ and minimum to be -1 and i got it wrong

**science**

what is the answer to number 2

**algebra**

Simplify the expression below completely ( x^2-x-30)/( x^2-25)

**algebra**

Simplify the expression below completely ( x^2-x-30)/( x^2-25)

**Physics**

At an instant when a soccer ball is in contact with the foot of the player kicking it, the horizontal or x component of the ball's acceleration is 810 m/s2 and the vertical or y component of its acceleration is 910 m/s2. The ball's mass is 0.32 kg. What is the ...

**physics**

In a cargo plane, the center of gravity must be between the front and rear landing gears in order to maintain a torque equilibrium. The front landing gears help counteract the torque provided by the rear landing gears in this case. A jet transport has a weight of 1.00 ✕...

**maths**

How much will a buyer pay for 15kg of fish if 1kg costs $435.65‚approximate your awser to the nearest dollar

**Math**

Ravi is thinking of a 2 digit number.The number is between 40 and 50.the sum of digits in tens and ones place 13. What is the number that Ravi is thinking of? Answer 11 am i rite

**eng composition**

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**math**

A random sample was taken from the normal IQ population, which has μ = 100 and σ = 15. ALL INFORMATION IS GIVEN: We gave a random sample of 25 undergrad students (n = 25) a new study pattern to see if it increases their IQ score. The samples mean IQ score is 112. The...

**Trig**

A 24-foot ladder is placed against a building. The building is perpendicular to the level ground so that the base of the ladder is 11 feet away from the base of the building. How far up the building, in feet, does the ladder reach? Round to nearest hundredth.

**physic**

In a serious accident, a nuclear power plant's reactor vessel cracks, and all of the cooling water drains out. Although nuclear fission stops, radioactive decay continues to heat

**physics**

A metal ball of mass 1.8 kg with initial temperature of 46.5 C is dropped into a container of 3 kg of water at 15 C. If the final temperature is 22.6 C, what is the specific heat of the metal? c_metal =____ J*kg*C?

**Math**

Which relation is NOT a function? Y=0 X=2 Y=2x Y=x+2

**Science**

B. smog

**physics**

A 1500 kg car at rest rolls down a hill inclined at 10 degrees with the horizontal. A 400 N friction force opposes its motion on the inclined plane and a 600 N on the horizontal surface a) how fast will it be moving at point B b) how far from point C will it travel before ...

**ENGLISH**

Select the complete subordinate clause (including all modifiers). I honestly did not know that you felt so strongly about the subject. A.I honestly b.I honestly did not know c.did not know that you d.that you felt e.that you felt so strongly f.that you felt so strongly about ...

**Pre-Calculus**

Write an algebraic expression in x for sec(arcsin(x/sqrt(x^(2) +4)))

**College Algebra**

4^-1.5

**algebra 1**

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**Statistics**

How do the 3rd grade boys’ weight in Principal Ben’s school compare to the national average (mean weight = 90, sd =15)? Provide the IV, DV, and best method of analysis.

**social studies**

Which iroquois nations lived the farthest from new york city?

**chemistry**

What are standard temperature and pressure? Why was a standard needed?

**Physics**

A car is traveling at 24.4 m/s. If the driver has a reaction time of 1 second, what will be his stopping distance if his car slows down at 8 m/s2?

**home economics**

Home management,child development n family relationshipa,clothing n textiles,food n nutrition

**Park University**

The number of arrivals per period is distributed according to the Poisson with an expected value of 0.75 unit per period. The cost of waiting per unit per period is $3.20. The facility cost for serving one unit per period is $5.15. What expected service rate should be ...

**physics**

a)E(R1+R2)/R2

**algebrae**

the price of gas in $3.72 per gallon. if Mayra has $20.00, how many gallons of gas can she buy?

**algebrae**

joey and three of his friends go to the movies. Each ticket costs $7.25. Write an algebraic expression to find to find the total cost of the tickets.

**essay Amanuensis Essay**

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**Accounting**

8,390

**Math (Combinatorics)**

Awesome, thanks!

**Math (Combinatorics)**

In how many ways can I place 5 different beads on a bracelet if flipping or rotating the bracelet does not change the order of the beads?

**Eng**

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**math**

there are 100 people in the u s senate 18 are on the foreign relations committee how many ways are there to select members for this committee if party affiliation is not a issue

**life orientation**

Sources of environmental health

**Science(Chemistry)**

Suppose that 23 mL of 0.6 M K2CrO4(aq) reacts with 13.7 mL of AgNO3(aq) completely. What mass of NaCl is needed to react completely with 38.5 mL of the same AgNO3 solution? Answer in units of g

**anatomy physiology/check please**

Muscular dysgenesis or dysgeny is a lethal, recessive, genetic disease of mice that is caused by a mutation in the mdg gene. Skeletal muscles from dysgenic mice are paralyzed and the animals die shortly after birth. You are a research scientist interested in the finding the ...

**math**

find mean median and mode of 10 1 10 15 1 7 10 10 1 6 13

**GEOMETRY**

ANGLES X AND Y ARE SUPPLEMENTARY ,AND THE MEASURE OF ANGLES X IS 24 DEGREES GREATER THAN THE MEASURE OF ANGLE Y. FIND THE ANGLE MEASURES.

**Statistics**

49

**Physics**

not sure

**Chemistry**

I have Kc= [(0.065)(0.130)^2]/(0.190^2) Kc= 0.030429 This answer was incorrect. Can you please help correct me?

**Chemistry**

What is the correct answer?

**math**

Trent earned $28,500 last year. He paid $8,265 for rent. What percent of his earnings did Trent pay for rent

**music**

Jazz originated in New Orleans from traditional african-american music. the earliest use of the modern blues scale was in the mid 1800's.

**science**

B No A tapeworm eats by absorbing predigested food and nutrients from the intestinal contents of its host through its outer covering or tegument

**Spanish**

Can you help me unscramble these two words? ngtialceoo, birol

**science**

A 10.0 kg cart and a 15 kg cart are locked together with a compressed spring between them. They are then released so that the spring pushes the two carts apart. The 15 kg cart is moving at 3.0 m/s afterward. How fast is the 10.0 kg cart moving?

**math**

jewelry marked 14 karat gold is 14/24 pure gold. what is the percent

**social studies**

in what ways could the natural barrier of the himalayas have both helped and hurt the cicilization of the indus river valley

**chemistry**

How much heat (in cal) is necessary to heat 27.0 mL of octane (s= 0.526 cal/g ®C ; d = o.703 g/mL ) from 50.6 ®C to 67.2 ®C? I understand the Delta T is = 16.6®C But I don’t know what d stands for (density) or how to apply to the formula.

**Algebra**

A rectangle was 25 cm longer than it was wide. A new rectangle was formed by decreasing the length by 6 cm and decreasing the width by 5 cm. The area of the new rectangle was 585 cm squared. Find the dimensions of the original rectangle.

**phy**

Tinny insects such as mosquitoes can seat on the surface of water.which physical principle makes this possible ?

**Literature**

I need a good Participle Phrase sentence in the story of Le Morte D' Arthur, Can anyone help me??

**Physics**

I believe the period time will be tripled from the original time at 2.55s because the distance that the spring was puled down was 3 times the original length. Answer= 2.55 seconds