Friday

July 25, 2014

July 25, 2014

Total # Posts: 1,509

**physics **

The initial velocity of a 2.36 kg block sliding down a frictionless inclined plane is found to be 1.46 m/s. Then 1.07 s later, it has a velocity of 4.46 m/s. What is the angle of the plane with respect to the horizontal? I did this: a=(4.46-1.46)/1.07=2.80 m/s^2 force along a ...

**Physics**

An elevator (cabin mass 600 kg) is designed for a maximum load of 2100 kg, and to reach a velocity of 3.1 m/s in 3 s. For this scenario, what is the tension the elevator rope has to withstand? This is what I've tried and is incorrect. 2100kg + 600 kg= 2700kg (m) (3.1/3)= 1...

**physics**

If a bird were to start out from the origin (where the student starts) and fly directly (in a straight line) to the school, what distance d_b would the bird cover?

**physics**

A student bikes to school by traveling first d_N = 0.900\rm {miles} north, then d_W = 0.600\rm {miles} west, and finally d_S = 0.100\rm {miles} south.

**Social Studies 8R - Help!!!!!**

Thank You!!!!! :)

**Social Studies 8R - Help!!!!!**

What role did the freedmen play in Reconstruction governments? Answer - Before the war, African Americans had no voice in southern government. During Recontruction, they not only voted in large numbers, but they also ran for and were elected to public office in the South. am i...

**math test**

In geometry, two lines or planes (or a line and a plane) are considered perpendicular

**English 8R - HELP! (FAST!)**

English 8R HW - literacy elements + literacy devices, look it up and take notes Please help!!!!! ps -- what is literacy devices????????/

**Science 8R - HW Help!**

I know the Scientific method it's just that I can't think of a problem I can solve How to get my homework done before 8pm? is that good????

**Science 8R - HW Help! **

Science 8R HW - Using the steps of the Scientific Method solve a problem that you may have (for example, 1. How can I get my little brother to stop eating my homework) I can't think of one.... please help! any ideas or suggestions???

**Social Studies 8R - HW Qs. Help! (FAST!)**

Heres my answer: However, except for a few battles such as Gettysburg and Antietam, no fighting had taken place on northern soil. am i correct??????? please be honest

**Social Studies 8R - HW Qs. Help! (FAST!)**

no .... i don't think so in my textbook is said: The North lost more soldiers in the war than the south did.

**Social Studies 8R - HW Qs. Help! (FAST!) **

The north lost more soldiers in the Civil War than the South did. Why was it easier for the north to recover from the war?

**Organic Chemistry**

cyclohexane=1.4264 toluene=1.4967 at 20˚C Mixture=1.4563 at 20˚C Assuming that the relationship between refractive index and concentration is linear, calculate the composition of the mixture. What do I do? Formula?

**chemistry**

Do impurities raise or lower the refractive index of a liquid? Please explain, I can't find it anywhere.

**SS8R: The National Convention The Female Voice**

Thank You! :) I'm going to go over my essay AGAIN and revise and edit it. Thank You again for reading and checking my essay Ms. Sue! :) I hope I get a good grade in this assignment. PS --- What's wrong with the sentence? There's not much multi-cultural in the audie...

**7th grade math**

What is the difference? |-9| - |13| =? A)-22 B)-4 C)4 D)22

**7th grade math**

I am going to practice more from the link, thank you Ms.Sue :)

**7th grade math**

Thanks but I still don't understand...what if when add two negative, nonzero integers? still "maybe be positive or negative"?

**7th grade math**

Which of these statements is true when you add a positive, nonzero integer and a negative, nonzero integer? A)The answer may be positive or negative. B)The answer is always negative. C)The answer is always zero. D)The answer is always positive.

**7th Grade Math**

(-13) + (-1)

**world history**

Compare and Contrast the various models of trading post empires that were created by the Europeans during the Early Modern Era. please help! thank you:)

**social studies**

C. Cuba

**us history/ english**

Can anybody help me understand the first three chapters of Lies My Teacher Told Me? Maybe possibly give some summaries or themes

**7th grade math**

then c.-26...thanks :)

**7th grade math**

Each of the first 4 pit stops a racecar driver makes loses ten seconds off the leader. The pit crew makes adjustments, and at each of the next two pit stops he gains 7 seconds on the leader. How much time is the driver off the leader? a. 40 seconds b. 14 seconds c. -26 seconds...

**Calculus**

i don't get 5/48 when i plug in root 3/2

**Calculus**

i don't get 5/48 when i plug in root 3/2

**Calculus**

i dont understand how to integrate x(1-x^2)^.5

**Calculus**

find the area between the two curves y=1/2x and y=x square root of 1-x^2

**7th grade math**

Which expression has the same value as −|−3|⋅|5|? a. −3⋅(−5) b. 3⋅5 c. −3⋅5 d. −(−3⋅5)

**Math**

100 ft

**Physics**

A pitcher throws a 0.5kg ball of clay at a 6kg block of wood. The clay sticks to the wood on impact, and their joint velocity afterward is 3m/s. What is the original speed of the clay?

**Law**

Okay thanks

**chemistry**

The peanut studied had a mass of 0.609 g before combustion and 0.053 g after combustion. The energy released during combustion caused a 14.2 degree Celsius increase in the temperature of 200.0 mL water in the calorimeter. Calculate the mass of peanut burned.

**chemistry**

awesome thank you!

**chemistry**

could the products ever become the reactants in chemical reaction? explain. thanks!

**math**

The school auditorium has 8 rows of seats, divided into 3 setions. Each section has 15 seats. Which of the following is the correct way to figure out the total number of seats? a. 8 x 15 b. 8 x 3 x 15 c. 3 x 3 x 8 d. 8 x 3 I thought it should be 15 x 3

**english**

what is a manifesto?

**statistics**

The number of column inches of classified advertisements appearing on Mondays in a certain daily newspaper has mean 320 inches and standard deviation 30 inches. Suppose that the results for 100 consecutive Mondays can be regarded as a random sample and let J denote the mean nu...

**physics**

Standing waves on a string are generated by oscillations having amplitude 0.005 m, angular frequency 942 rad/s, and wave number 0.750p rad/m. a.) What is the equation of the standing wave? b.) At what distances from x=0 are the nodes and antinodes? c.) What is the frequency of...

**health**

C Peer pressure to look a certain way

**Physics**

A series RCL circuit has a resonant frequency of 1500 Hz. When operating at a frequency other than 1500 Hz, the circuit has a capacitive reactance of 5.0 Ù and an inductive reactance of 30.0 Ù. What are the values of (a) L and (b) C? I know I should be using thes...

**physics**

A 1.20 kg mass on a horizontal spring oscillates on a frictionless surface with a displacement as a function of time given by x(t) = 0.075cos(4.16t – 2.45). (Units are standard units.) a.) Find the time for one complete vibration. b.) Find the force constant of the sprin...

**Physics**

A spinning disk of mass 5.0 kg and radius 0.25m is rotating about an axis through its center at 400 rev/min. a.) What is the angular velocity of the disk in rad/s? b.) What is the moment of inertia of the disk? c.) If it accelerates at a constant rate to 800 rev/min in 8 sec, ...

**physics**

A spinning disk of mass 5.0 kg and radius 0.25m is rotating about an axis through its center at 400 rev/min. a.) What is the angular velocity of the disk in rad/s? b.) What is the moment of inertia of the disk? c.) If it accelerates at a constant rate to 800 rev/min in 8 sec, ...

**Physics**

If a wire of resistance R, resistivity ñ "roe", length L, and cross sectional area A, had its length doubled and radius halved, what would be the ratio of R'/R. Where R' is the new resistance of the wire. I thought it would be 4 times R, giving the rat...

**physics**

A wire has a resistance of 27.2 ohms. It is melted down, and from the same volume of metal a new wire is made that is 3 times longer than the original wire. What is the resistance of the new wire? Resistance and length of wire are proportional, but what I am unsure of is if th...

**Physics**

A 1.20kg ball is rolled down a frictionless ramp whose top is 0.80m above a horizontal spring with ks = 800N/m. The ball reaches the horizontal just in front of the spring. a.) What is the kinetic energy of the ball just before it contacts the spring? b.) What is the velocity ...

**Math**

A tree one hundred cubits high is distant from a well two hundred cubits; from this tree one monkey climbs dow the tree and goes to the well, but the other leaps in the air and descends by the hypotenuse from the high point of the leap, and both pass over an equal space. Find ...

**Physics**

A revolving door consists of four rectangular glass slabs,with the long end of each attached to a pole that acts as the rotation axis. Each slab is 2.60m tall by 1.50m wide and has mass 39.5 . Find the rotational inertia of the entire door. If it's rotating at one revoluti...

**Physics**

A skier starts from rest at the top of a hill that is inclined at 9.8° with the horizontal. The hillside is 170 m long, and the coefficient of friction between snow and skis is 0.0750. At the bottom of the hill, the snow is level and the coefficient of friction is unchange...

**algebra**

Simplifying 2log(x + 1) + -2log(x + -1) + -1log(x + -1) Reorder the terms: 2glo(1 + x) + -2log(x + -1) + -1log(x + -1) (1 * 2glo + x * 2glo) + -2log(x + -1) + -1log(x + -1) (2glo + 2glox) + -2log(x + -1) + -1log(x + -1) Reorder the terms: 2glo + 2glox + -2glo(-1 + x) + -1log(x...

**ALGEBRA**

E=L X R 460 = L X 92 L= 460/92 = 5 amps

**Algebra & Trig**

Was there a picture given? I don't know if I can answer the question without a picture.

**Physics **

An object slides down a frictionless 33 degree incline whose vertical height is 54.0 cm. How fast is it going in meters/second when it reaches the bottom?

**Physics **

A spring whose spring constant is 650 N/m is compressed 0.600 m. What speed (in meters/second) can it give to a 0.100 kg ball when released

**Physics **

What is the minimum work in joules needed to push a 1460 kg car 14.0 m up a 12.5 degree incline? (Ignore friction.)

**physics**

A 1370 kg car rolling on a horizontal surface has a speed of 20 km/hr when it strikes a horizontal coiled spring and is brought to rest in a distance of 5.5 m. What is the spring constant (in N/m) of the spring? (Ignore nonconservative forces such as friction.)

**physics**

Why do the magnetic poles of cans reverse when turned upside down?

**mathematics**

what is seven-digit number if the ones digit is the sum of the millions digit and thousands digit is and the digits is the number from the largest value to the smallest place value are consecutive numbers.

**Mathematics**

how many times greater is the place value of a digit of a number than the place value of the next digit to its right?

**Chemsitry**

Use these data to estimate Avogadro's number. Palladium crystallizes with a face-centered cubic structure. It has a density of 12.0g/cm^3 , a radius of 138 pm , and a molar mass of 106.42 g/mol .

**English III**

#4 is wrong

**English III**

#4 is wrong

**English III**

#4 is wrong

**English III**

#4 is wrong

**English III**

#4 is wrong

**Social Studies 7R - DBQ (PLZ read!!!)**

I just need to find out the similarities between the south and the north (Sectionalism) After this I'm done with my essay but then again I have to go over it

**Social Studies 7R - DBQ (PLZ read!!!)**

I'm almost done with my essay. I just have to choose one more document which means that I have to write another paragraph and I have to write the conclusion. Plus I want to add something for my second paragraph. the similarities between the south and the north, Sectionalis...

**literature**

thank you!

**literature**

in the book Life of Pi. Describe the difference between the two stories Pi tells? thanks!

**Financial Accouting**

Prepare a 10-column work sheet for fiscal year 2005, starting with the unadjusted trial balance and including adjustments based on these additional facts: a. The supplies available at the end of fiscal year 2005 had a cost of $3,200. b. The cost of expired insurance for the fi...

**chemistry**

are you wanting to know what heat capacity is?

**English 2**

Thank you! But, just noting, does she not tell Caesar that they will send Mark Antony to the Senate House to say that he is not well??

**English 2**

Shakespeare uses Calphurnia to build suspense about what will happen in all of the following ways except a.urging Caesar not to go to the Senate. b.recounting all the disturbing omens. c.suggesting that Caesar pretend he is ill. d.relating that she dreamt Caesar was assassinat...

**calculus**

Rotate the region enclosed by the given functions around the x-axis. Determine the volume. y=sqrt(sinx) ; y=0 ; x=0 ;x=pi limits are 0 to pi

**calculus**

Rotate the region enclosed by the given functions around the x-axis. Determine the volume. y=x^2+2x+1 and y=2x+5 limits are -2 and 2

**calculus**

Find the total area enclosed by the functions given below. y=x^2+2x+1 and y=2x+5 limits are -2 to 2

**Geography Help??**

show how society and family life compare and contrast in the Pacific Rim? I don't need an answer, just an explanation please. I don't know what that means..

**6th G-Math**

1.Which of the following best describes the graph of x > 2 ? A. Closed dot at x = 2, and shading to the right B. Closed dot at x = 2, and shading to the left C. Open dot at x = 2, and shading to the right D. Open dot at x = 2, and shading to the left

**6th G-Math**

Which table (A or B) matches this description: When the input is 0, the output is 0. As the input increases by 1, the output increases by 6. Table A Input Output 0 0 1 6 2 12 Table B Input Output 0 0 1 6 2 36

**math **

mike knits and sells them for $36 at the street fair every other week. it costs him about $19 for the yarn for each scarf and $8 for the other decorations he uses on them.mike estimates that he makes about 75% profit on each scarf he sells. is mike's estimate correct ?

**6th G-Math**

If the ratio of men to women in a movie theater is 1.00 when written as a decimal, what must be true? A. The ratio of women to men in the theater is 0.50. B. The ratio of women to men in the theater is 2.00. C. The ratio of women to total people in the theater is 0.50. D. The ...

**Heat Transfer**

A factory would like to produce plain carbon steel strips with pieces of polyethylene plastic ﬁlm bonded on them. The bonding operation will use a laser that is already available to provide a constant heat ﬂux of q′′0= 85, 000 W/m2for a speciﬁe...

**Physics**

what 2 properties of carbon make it a good material to use for motor brushes?

**6th G-Math**

1.What is a reasonable estimate for the area of a circle with radius 4 cm? A. Area=12cm^2 B. Area=16cm^2 C. Area=24cm^2 D. Area=48cm^2

**math**

13 - 8x = 5x + 2 x= -11/-13?

**6th G Math**

Sam has started babysitting to earn extra money. On Thursday night she earned $26, on Friday night she earned $19, and on Saturday night she earned $24. What is the mean amount of money she earned during the weekend?

**science-anatomy**

How is static equilibrium accomplished? How is dynamic equilibium accomplished?

**science**

How does colorvision and night vision function?

**math**

sonya spent 3/8 of her money and had $15 left. how much money did she orginally start with?

**Trig**

1)y=1-tan(3pi-2x) Find period and phase shift 2)y=-sin(5x+3) Find amplitude,period,and phase shift 3)y=1-sin(3pi-2x)Find amplitude,period,and phase shift 4)y=2csc(2x-1)Find period and phase shift 5)Given the graph of y = sin (x), what transformation can be made to make the gra...

**Trig**

y=sin(2pi*x-pi) find the amplitude, period, and phase shift

**Trig**

y=sec(2x+1) Find the period and phase shift. Sorry i'm really bad at these.

**Trig**

y=2tan(x-1) Find the period and phase shift.

**physics**

In this equation, vd is the speed of the detector, and vs is the speed of the source. Also, fs is the frequency of the source, and fd is the frequency of the detector. If the detector moves toward the source, vd is positive. If the source moves toward the detector, vs is posit...

**Calculus**

solve: Sin2x=Sinx

**Chemistry**

How many mL of 3.00M HNO3 would you need to make exactly 100mL of 0.83 HNO3 by dilution with water? (The FM of HNO3 = 63.0.)

**chemistry**

Ammonium iodide dissociates reversibly to ammonia and hydrogen iodide. NH4I(s) Picture NH3(g) + HI(g) At 400°C, Kp = 0.215. Calculate the partial pressure of ammonia at equilibrium when a sufficient quantity of ammonium iodide is heated to 400°C.

Pages: <<Prev | 1 | 2 | **3** | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | Next>>