Wednesday

October 26, 2016
Total # Posts: 3,329

**Chemistry**

The specific heat of aluminum is 0.900*j/g*C How much heat is required to raise the temperature of a 30.0 g block of aluminum from to 25.0 oC to 75 oC?

*March 18, 2016*

**Calculus**

Two cruise ships leave the same point outside St. John’s harbor at noon. Ship A travels west at 20 km/hr, while Ship B travels south at 25 km/hr. Using calculus, determine how fast they are separating from each other at 2:00 p.m.

*March 15, 2016*

**Geometry**

Two model trains begin at the toy train station and travel continuously on two circular tracks of equal length. The first train completes a circuit in 20 seconds and the second train in 15 seconds. If both trains leave the station at the same time, after how many seconds will ...

*March 14, 2016*

**Geometry**

Two model trains begin at the toy train station and travel continuously on two circular tracks of equal length. The first train completes a circuit in 20 seconds and the second train in 15 seconds. If both trains, leave the station at the same time, after how many seconds will...

*March 14, 2016*

**Algebra**

If the area of a triangle is 110 square units and the base is 2x+12 and the height is x+5, what is the numerical base and height?

*March 12, 2016*

**Math**

Sam wants to find the height of a window in a nearby building but it is a cloudy day. Sam puts a mirror on the ground between himself and the building. He tilts it so that when he is standing up he sees the reflection of the window. The base of the mirror is 1.22 meters from ...

*March 10, 2016*

**Math**

Sam wants to find the height of a window in a nearby building but it is cloudy. Sam puts a mirror on the ground between himself and the building. He tilts it toward him so that when he is standing up he sees the reflection of the window. The base of the mirror is 1.22 meters ...

*March 10, 2016*

**Math**

Miguel is 5'10" tall and cast a shadow that is 4"8" tall, a nearby tower cast a shadow that is 8"9". How tall is the tower?

*March 10, 2016*

**Chemistry**

Elemental sulfur occurs as octatomic molecules, S8. What mass of fluorine gas is needed for complete reaction with 24.1 g sulfur to form sulfur hexafluoride? I don't know where to even start with this question

*March 8, 2016*

**trig plz help**

Solve. Round off your answer to the nearest foot. (The picture is not drawn to scale.) A balloon is 1500 feet above the ground. The angle of depression from the balloon to headquarters is 46°21'. How far is the headquarters from a point on the ground directly below the...

*March 6, 2016*

**last 2 questions trig!!**

4. Solve the triangle(s), if possible. Round to the nearest tenth. Solve the triangle. Side a = 8, side b = 10, side c = 12 6. Two boats leave the same dock at the same time. The first sails in a straight line N40°W at 36 miles per hour and the second goes in a straight ...

*March 6, 2016*

**trigonometry**

In questions 2A, 2B, and 2C below, find the exact values using the given information: sin α = 1/6 with α between 0 and π/2 sin β = 3/5 with β between π/2 and π 2A. Find cos (α + β) 2B. Find tan (2β) 2C. Find sin (β/2)

*March 6, 2016*

**plz help trig!!!!!**

A boat sails 20 km in a direction of N75°E. Draw the 20 km travelled in a direction of N75°E as a vector v in standard position. Find the component form of the vector v. Round your answers to the nearest hundredth. 2 pts. B. Next, the boat turns and sails 10 km in a ...

*March 6, 2016*

**college algebra**

there are three consecutive even integers such that twice the first is 20 more than the second. find the largest integer

*March 5, 2016*

**stat**

You take a trip by air that involves three independent flights. If there is an 72 percent chance each specific leg of the trip is on time, what is the probability all three flights arrive on time? (Round your answer to 3 decimal places.)

*February 26, 2016*

**Algebra 2**

Liz has a rectangular garden with a walkway around the edge. with the walkway included the entire garden area has a 20 foot length and an 18 foot width. At the edge of the walkway it is twice as wide as it is at the edge of the width. The area of the garden itself without the...

*February 26, 2016*

**Physics**

A small marble is placed in the bottom of a large bowl. If the marble is given a small push it will oscillate back and forth about the bottom of the bowl, moving along a small arc with radius 0.50 m. Assuming the marble rolls without slipping what is the period of this ...

*February 24, 2016*

**Physics**

The axle of a solid wheel of mass M and radius R is attached to a horizontal spring of constant k as shown below. Derive and simplify an expression for the period of the wheel’s oscillation, assuming it rolls back and forth without slipping. Answer T= 2pi squrt(3M/2k)

*February 24, 2016*

**Physics**

A certain object of mass 0.50 kg moves along the x-axis. Its potential energy is given by U = 3x2 + 8x. Starting at rest, the object is released at the origin. (a) Find the maximum speed attained by the object. (b) Find the position about which it oscillates. (c) Find the ...

*February 24, 2016*

**science**

Ammonium nitrate breaks down into Dinitrogen monoxide and dihydrogen monoxide

*February 24, 2016*

**Math**

The diagram below shows garden. Estimate part of the garden used for planting beans. Explain how you decided.

*February 23, 2016*

**Physics**

The teacher gives us the answer, but still thank you!

*February 15, 2016*

**Physics**

For each of the following functions describing the net force on a particle, determine any and all positions of equilibrium and characterize each as stable or unstable. (a) F = 4x − 2x3, (b) F = x2 + x − 6, (c) F = 5x − 9. Answer: a. x = 0, unstable; x = &...

*February 15, 2016*

**chem**

Suppose a g is collected in 145 mL flask whef-tfle temperature of the gas is 23°C and the pressure of the gas is 785 mm Hg. Calculate the volume ofthe gas at STP.

*February 14, 2016*

**Math**

What is sin Θ given (3,-2) is a point on the terminal of Θ? A.-2/3 B.-sqrt13/13 C.3sqrt13/13 D. -2sqrt13/13 I think it's C

*February 12, 2016*

**Math**

Cos(-Θ) = Sqrt2/3 SinΘ<0 What is the value of sin Θ? A. Sqrt7/3 B.-sqrt7/3 C.sqrt14/7 D.-sqrt14/2 I think it's C

*February 12, 2016*

**Pre Algebra**

Laura inherits $52,000 and decides to invest part of it in an education account for her daughter and the rest in a 5-year CD. If the amount she puts in the education account is $7,000 more than twice the amount she puts in the CD, how much money does Laura invest in each account?

*February 7, 2016*

**math**

What is the fist one?

*January 30, 2016*

**Math**

123+45-67+8-9=100

*January 25, 2016*

**Algebra Applications**

Jacqueline is 115 miles away from Miranda. They are traveling towards each other. If Miranda travels 9 mph faster than Jacqueline and they meet after 5 hours, how fast was each traveling?

*January 24, 2016*

**Damon or DrBob please help..chemistry/physics**

Question: 0.37 litre of an ideal monatomic gas (Cv,m = 3R/2) initially at 51 °C and 36 atm pressure undergo an expansion against a constant external pressure of 1.06 atm, and do 2.3 kJ of work. The final pressure of the gas is 1.06 atm. Calculate the change in enthalpy, &#...

*January 22, 2016*

**Physical Chemistry - please help!**

Opps, the question should be: 0.37 litre of an ideal monatomic gas (Cv,m = 3R/2) initially at 51 °C and 36 atm pressure undergo an expansion against a constant external pressure of 1.06 atm, and do 2.3 kJ of work. The final pressure of the gas is 1.06 atm. Calculate the ...

*January 21, 2016*

**Physical Chemistry - please help!**

Question: 0.19 litre of an ideal monatomic gas (Cv,m = 3R/2) initially at 83 °C and 47 atm pressure undergo an expansion against a constant external pressure of 1.19 atm, and do 2.3 kJ of work. The final pressure of the gas is 1.19 atm. Calculate the change in enthalpy, &#...

*January 21, 2016*

**Chemistry**

1) 0.19 litre of an ideal monatomic gas (Cv,m = 3R/2) initially at 83 °C and 47 atm pressure undergo an expansion against a constant external pressure of 1.19 atm, and do 2.3 kJ of work. The final pressure of the gas is 1.19 atm. Calculate the change in enthalpy, ΔH 2...

*January 21, 2016*

**Math **

Two numbers whose are in the ratio 4:3. Their sum is 70. Find the numbers.

*January 20, 2016*

**math**

Ricky is building a rectangular garden with an area of 100 square feet. He wants the length of the garden to equal 4 feet more than 2 times the width. Enter an equation that expresses the area of the garden in terms of the width, w, of the garden.

*January 19, 2016*

**Math**

The championship is over in two days. After the first day, his score is -150. Ten minutes into the second day his score is -210. Assume that his score continues to change at the same rate for the whole second day. Whats the expression

*January 18, 2016*

**Health connexues academy**

Its D trust me I am in connexues too

*January 18, 2016*

**math**

what is the answer when you order the common fraction 4/7,1/2 and 2/9 in ascending order??????????????????????

*January 17, 2016*

**math**

what is the answer when you order the common fraction 4/7,1/2 and 2/9 in ascending order?????????????????????????

*January 17, 2016*

**pure maths, agriculture,life sciences, physics**

i want to know what does those subject i choose fall under which career

*January 16, 2016*

**English**

Thank you!!

*January 14, 2016*

**English**

6. Compound-complex 8. Compound 9. complex

*January 14, 2016*

**English**

10. Compound complex

*January 14, 2016*

**English**

It's about identifying types of sentences I struggle in English so I was gonna ask if these answers are right: 1. "To build a fire" is set in the Yukon where a man is journeying alone. - complex 2. The Yukon lay under three feet of ice. -simple 3. He could see ...

*January 14, 2016*

**english**

dressing ?

*January 13, 2016*

**Math**

i don't know

*January 10, 2016*

**Math**

Can you help me with my homework??? It takes Evan 6 3/4 hours to mow 3 lawns. It takes him 2 1/3 hours to mow Mr.gals lawn and 1 3/4 hours to mow Ms.lee's lawn. How many hours did it take to mow the third lawn?

*January 3, 2016*

**Social Studies-I need help**

Thanks for the help! (=

*December 21, 2015*

**Social Studies-I need help**

Thanks Ms. Sue. So, travelers and traders passed through these regions, and these people made the regions more diverse, right?

*December 21, 2015*

**Social Studies-I need help**

For thousands of years the Middle East has been the crossroads between _______ and _______. What type of people crossed through this region? How did this effect the area? Pls help me, I'm stumped!

*December 21, 2015*

**Science**

Use mirrors

*December 16, 2015*

**5th grade math**

Actually it's $18.64

*December 16, 2015*

**Algebra 2**

A change machine contains nickels,dimes, and quarters. There are 75 coins in the machine, and the value of the coins is $7.25. There are 5 times as many nickels as dimes. How many quarters are in the machine?

*December 15, 2015*

**Algebra 2**

The sum of three numbers is 23. The first number is equal to twice the second number minus 7. The third number is equal to one more than the sum of the first and second numbers. What is the First Number?

*December 15, 2015*

**math**

Three times geoff age plus 3 is maryia age .maryia is 48 what is geoff age

*December 13, 2015*

**Geometry **

Two straight lengths of wire are placed on the ground, forming vertical angles. If the measure of one angles formed is 72 degrees, what are the measures of the other three angles. Explain your answer. My answer-- Vertical angles are congruent and if the measure of 1 of the ...

*December 8, 2015*

**Geometry**

Y is actually the vertex angle, as one of the remote interior angle.

*December 8, 2015*

**Geometry**

In an isosceles triangle, line segment AC is congruent to line segment AB. Find the value of y in terms of x if one of the remote interior angle is y and the exterior angle is 3x+20. I think the answer is y=6x-140 but I don't know how they got it.

*December 8, 2015*

**pigskin**

what two competing team would deserve the title kudzu klash

*December 8, 2015*

**Chemistry**

Zn + 2HCl = ZnCl2 + H2 Which amount would produce more H2: 17gramsZn OR 150 mL of 0.5HCl?

*December 7, 2015*

**Soc 203**

According to the conflict perspective, laws are relative and change over time. true or false

*December 7, 2015*

**Physics**

A fish tank has dimensions 46 cm wide by 1.0 m long by 0.70 m high. If the filter should process all the water in the tank once every 3.0 h, what should the flow speed be in the 3.0-cm-diameter input tube for the filter? I tried using Q=v/t and Q=vA... V=0.46m*1m*0.7m=0.322m^3...

*December 6, 2015*

**Quick Question**

Were African Americans allowed to vote during the 1960's? I just need a simple yes or no.

*December 6, 2015*

**AP Macroeconomics**

I got this question wrong: Which of the following best describes the relationship between bank reserves, the federal funds rate, and a decrease in interest rates for consumers and business? The answer is: If the FOMC uses monetary policy to increase the amount of reserves in ...

*December 6, 2015*

**Social Studies**

Canada achieved independence gradually and with legislation. It was called the _______

*December 5, 2015*

**Math**

thanks

*December 4, 2015*

**Math**

1.The midpoint of SM is (5 -11) one endpoint is S (3,5). What are the coordinates of endpoint M? 2.Describe a process you would use to create the perpendicular bisector to a segment AB using only an unmarked straightedge and an unmarked compass. 3. How is constructing a ...

*December 4, 2015*

**Geometry **

How would you write the name of a segment differently than the name of a line? what symbols would you use? How is constructing a perpendicular bisector similar to constructing an angle bisector? how is it different? Describe a process you would use to create the perpendicular ...

*December 3, 2015*

**Social Studies**

Ah. it's d.

*December 1, 2015*

**Social Studies**

Ah, forgot to include questions and my answer! Oops.. A: The City slums emptied *** B: The life of poor did not improve. C: Poverty was eliminated. D: The life of poor improved greatly.

*December 1, 2015*

**Social Studies**

How did the Industrial Revolution affect the poor in the late 1800s?

*December 1, 2015*

**Social Studies**

D, sorry I forgot !

*December 1, 2015*

**Social Studies**

Why did some Southern states withdraw from the united states in 1860? A They wanted to avoid the Civil War. B They didn't believe in manifest. C They wanted trade freely with great britan. D They feared they would have little say in the government

*December 1, 2015*

**Social Studies**

It's b! Thank you reed.

*December 1, 2015*

**Social Studies**

What effects did the arrival of Europeans have on native Americans? A the arrival had little effect on native Americans. B Conquest and disease brought by Europeans changed the native american way of life forever C Native Americans and newly arrived Europeans lived in harmony ...

*December 1, 2015*

**Math**

never mind i have the answer

*November 30, 2015*

**Math**

can someone explain how to do this Points A (-10,-6) and B (6,2) are the endpoints of AB. What are the coordinates of point C on AB such that AC is 3/4 the length of AB? a) (0,-1) b) (2,0) c) (-2,-2) d) (4,1)

*November 30, 2015*

**Math **

Hendrick want to enlarge a photo that is 4 inches wide and 6 inches tall the enlarged photo keep the same ratio how tall is the enlarged photo if it is 12 inches wide

*November 30, 2015*

**Social Studies**

What does this graph suggest about the costs and benefits of balancing the budget? I have a bar graph that shows the following data: The title of the graph is "How Americans Want to Balance the Budget". Only with spending cuts: 20% Mostly with spending cuts: 30% ...

*November 25, 2015*

**which of these actions would most help a worker im**

which of these actions would most help a worker improve their productivity? A: Finding a new job in a different field. B: Taking a training course related to her job. ****** C: Buying a laptop computer for home use. D: asking her employer to give her a raise. The answer is B, ...

*November 25, 2015*

**English Grammar (cover letter)**

Thank you.

*November 23, 2015*

**English Grammar (cover letter)**

My education, communication skills, and international experience, both in a study and work capacity, have shown that I am an outstanding candidate for the position.

*November 23, 2015*

**finite math**

In order to solve this I would need to see an equation.

*November 23, 2015*

**English**

It turns out I got them all correct except 6. The correct answer was B.

*November 23, 2015*

**English**

These are questions from the stories Marita’s Bargain by Malcolm Gladwell, The Secret to Raising Smart Kids, A Walk to the Jetty by Jamaica Kincaid, and ILE by Eugene O’Neill. I Answered all pf the questions I just wanted a second opinion on them. 1. What is ironic ...

*November 23, 2015*

**math**

A mix for eight servings requires 2 2/3 cups of water. If i want to make 11 servings how much water do i need? How about 6 servings?

*November 23, 2015*

**Math: proofs**

if f exist in the Riemann integral from [a,b] and if (P_n) is any sequence of tagged partitions of [a,b] such that the norm of these tagged partitions goes to 0 and lim_n S(g,P_n) exists.

*November 18, 2015*

**Math **

Luis wants to divide a 3/4 pound box of skittles into small bags. Each of the bags will hold 1/12 pound of skittles. How many bags of skittles can he make?

*November 17, 2015*

**spanish **

A nosotros __________ __________ las frutas.

*November 16, 2015*

**precalcus**

what is the rational equation of a function with intercepts at (8,0) and (0,0.16) and a horizontal asymptote at y=0.5 and a vertical asymptote at x=3 and a removable discontinuity at (3,-1)

*November 11, 2015*

**Chemistry**

How many atoms of carbon are present in 49 g of a compound that is 54 . 1% carbon, by weight?

*November 8, 2015*

**Phy**

A uniform beam of length l whose mass is 3.5kg rests with its ends on two digital scales. A block with a mass of 1.3kg rests on the beam, 1/4 of the distance in from the left balance. What do the scales read?

*November 4, 2015*

**math**

consider a scenario where a binomial experiment is conducted and the probability of success in each trial is 40%. if the experiment includes 15 trials, what is the probability that out of those 15 trials, exactly 10 will be successful? Pls help with formula!

*November 4, 2015*

**Chemistry**

Ca(OH)2+Na2CO3> 2NaOH + CaCO3 50g hydroxide and 50g sodium carbonate are reacted. How many grams sodium hydroxide will be made?

*November 1, 2015*

**math**

$30.00

*October 29, 2015*

**Stats**

Y is a discrete random variable. The table below reports the values of Y and the corresponding frequency, n (the number of observations for each value). Based on this information, what is the expected value of Y? Y n 50 50 70 100 100 200 200 50 120 100 140 100 150 100

*October 29, 2015*

**Stats**

Assume that the table below represents the distribution of X. Note that X is a discrete random variable. The second column reports the number of observations for each value of X. Based on this information, what is the value of the Cumulative Distribution Function when X equals...

*October 29, 2015*