Thursday

July 2, 2015

July 2, 2015

Total # Posts: 82,640

**PHYSICS**

When some stars use up their fuel, they undergo a catastrophic explosion called a supernova. This explosion blows much or all of a star's mass outward, in the form of a rapidly expanding spherical shell. As a simple model of the supernova process, assume that the star is a...
*May 3, 2015*

**Math**

Thank you Steve :).
*May 3, 2015*

**Math**

The ratio of a to b is 3 to 4, and the ratio of c to b is 1 to 2. What is the ration of a to c? F. 1 to 1 G. 3 to 1 H. 3 to 2 J. 3 to 8 K. 6 to 1
*May 3, 2015*

**Math**

Thomas and Jonelle are playing darts in their garage using the board with the point values for each region shown below. The radius of the outside circle is 10 inches, and each of the other circles has a radius 2 inches smaller than the next larger circle. All of the circles ...
*May 3, 2015*

**Math**

Thanks!!
*May 3, 2015*

**Math**

What would the grapg of 10/x look like? A. a straight line B. a parabola C. a curve*** D. none of the above What would the graph of y=3/4x - 7/8 look like? A. a straight line*** B. a parabola C. a curve D. none of the above y=x2 + 1 look like? A. straight line B. a parabola...
*May 3, 2015*

**math**

which function has the greater rate of change? x-axix: -1 | 0 | 1 | 2 | y-axis: 0 | 1 | 2 | 3 | the graph has a line and 3 dots on the line. the first dot is 0, -1 the second dot is 0, 1 the third dot is 1, 2 A. the rates of change are equal B. the graph has a greater rate of ...
*May 3, 2015*

**Math**

Thank you Ms. Sue :).
*May 3, 2015*

**Math**

40%
*May 3, 2015*

**Math**

On September 1, a dress was priced at $90. On October 1, the price was reduced by 20%. On November 1, the price was further reduced by 25% of the October 1 price and marked FINAL. What percent of the original price was the FINAL price? F. 40% G. 45% H. 55% J. 60% K. 77.5%
*May 3, 2015*

**physics**

vibrating a long spring with a succession of pulses with a frequency of 50Hz produces adjacent nodes that are separated by 3.5cm. what is the velocity of the longitudinal waves formed?
*May 3, 2015*

**Math**

I'm a little confused. Is the right equal to 2sin to the power of 2x-1?
*May 3, 2015*

**Math**

(sinx - cosx)(sinx + cosx) = 2sin^2x -1 I need some tips on trigonometric identities. Why shouldn't I just turn (sinx + cosx) into 1 and would it still have the same identity?
*May 3, 2015*

**mth121**

mth 121(solve the linear equation:2x+3y=3, x-2y=5 and 3x+2y=7.)
*May 3, 2015*

**trigonometry**

Solve cos(x)=0.07 on 0≤x<2π
*May 3, 2015*

**Sociology**

I need help choosing an object to describe me for a sociology project.
*May 3, 2015*

**English**

Why is it that Ray Bradbury wrote Fahrenheit 451 during the 1950s?
*May 3, 2015*

**Math**

There is more to it... Find the exact value tan^-1(tan(-22/15pi)) I just could not figure out how to find an exact value for tan(-22/15pi)
*May 3, 2015*

**Math**

Evaluate the following expressions tan(−22/15π)
*May 3, 2015*

**Math**

Is 8x^2 + x^2 - 7x - x + 2x + 5y - 3y equal to 9x^2 - 8x + 2y or 9x^2 - 6x + 2y?
*May 3, 2015*

**ANT101 **

Sir Edward Burnett Tylor’s concept of survivals is best defined by which of the following? (Points : 1) Cultural traits change the least because they are the means by which a society copes with its environment. Primitive cultures have avoided extinction as more complex ...
*May 2, 2015*

**PHYSICS**

When some stars use up their fuel, they undergo a catastrophic explosion called a supernova. This explosion blows much or all of a star's mass outward, in the form of a rapidly expanding spherical shell. As a simple model of the supernova process, assume that the star is a...
*May 2, 2015*

**Math**

I need help proving this identity 1/cosx - cosx = sinxtanx
*May 2, 2015*

**PHYSICS**

A pipe 0.42 m long and closed at one end is filled with an unknown gas. The third lowest harmonic frequency for the pipe is 780 Hz. (a) What is the speed of sound in the unknown gas? (b) What is the fundamental frequency for this pipe when it is filled with the unknown gas?
*May 2, 2015*

**PHYSICS**

A uniform board is leaning against a smooth vertical wall. The board is at an angle above the horizontal ground. The coefficient of static friction between the ground and the lower end of the board is 0.750. Find the smallest value for the angle , such that the lower end of ...
*May 2, 2015*

**ANT101 **

The ___ method of anthropology is useful in many different work settings. (Points : 1) marketing pedagogical statistical participant observation
*May 2, 2015*

**PHYSICS**

A hiker, who weighs 977 N, is strolling through the woods and crosses a small horizontal bridge. The bridge is uniform, weighs 4500 N, and rests on two concrete supports, one on each end. He stops 1/6 of the way along the bridge. What is the magnitude of the force that a ...
*May 2, 2015*

**PHYSICS**

The figure shows a jet engine suspended beneath the wing of an airplane. The weight of the engine is 14600 N and acts as shown in the figure. In flight the engine produces a thrust of 55100 N that is parallel to the ground. The rotational axis in the figure is perpendicular to...
*May 2, 2015*

**Math - Trigonometry**

Reiny, are you still here. I need help quick. I'm really bad at trigonometric identities. I need help.
*May 2, 2015*

**Math - Trigonometry**

LS = 1/cosx - cosx/cosx = 1-cosx/cosx = sinx/cosx I know this answer is extremely wrong. I have no idea what to do.
*May 2, 2015*

**Math - Trigonometry**

I need help proving this identity 1/cosx - cosx = sinxtanx
*May 2, 2015*

**Math - Trigonometry**

I need help proving this identity 2sin^2x - 1 = sin^2x - cos^2x
*May 2, 2015*

**Math - Trigonometry**

I need help proving this identity cscx + secx = (cosx + sinx)(secx)(cscx)
*May 2, 2015*

**Math**

Thank you so much Ms. Sue. This question was confusing. Two times I kept getting 106.
*May 2, 2015*

**Math**

Barb is going to cover a rectangular area 8 feet by 10 feet with rectangular paving blocks that are 4 inches by 8 inches by 2 inches to make a flat patio. What is the minimum number of paving blocks she will need if all the paving blocks will face the same direction? (Note: ...
*May 2, 2015*

**statistics**

8.value: 10.00 points The fracture strength of a certain type of manufactured glass is normally distributed with a mean of 509 MPa with a standard deviation of 17 MPa. (a) What is the probability that a randomly chosen sample of glass will break at less than 509 MPa? (Round ...
*May 2, 2015*

**Economics**

Once we have made these assumptions, what is the question?
*May 2, 2015*

**French**

Thank you very much! Just to clarify for the first one, if it were in the je form, would the command still be "Prends des salades"?
*May 2, 2015*

**French **

I have some questions about the imperative. 1. Prends les salades! How can one tell if this is an order to you or myself, as the conjugations for both tu and je are the same for "prendre"? 2. Is "acheter" a regular or irregular verb? I want to know whether ...
*May 2, 2015*

**life orientation**

Because they need help its important to their lives
*May 2, 2015*

**Physics**

A 1.4-kg object moves along the x axis, subject to the potential energy shown in the figure. If the object's speed at point B is 1.70 m/s, what are the approximate locations of its turning points? ___________m (left-hand turning point) ___________m (right-hand turning ...
*May 2, 2015*

**Physics**

A 1.4-kg object moves along the x axis, subject to the potential energy shown in the figure. If the object's speed at point B is 1.70 m/s, what are the approximate locations of its turning points? ___________m (left-hand turning point) ___________m (right-hand turning point)
*May 2, 2015*

**Math**

A fan with a diameter of 10cm is spinning at 25 revolutions per minute clockwise. The fan's reference blade starts pointing directly upwards. Determine an equation for a sinusoidal function that represents the fan's reference blade's vertical distance from the ...
*May 1, 2015*

**algebra**

x=-7,x=7,x=5/6
*May 1, 2015*

**Math- Trigonometric Functions**

I need help please. I have to finish this question.
*May 1, 2015*

**Math- Trigonometric Functions**

A fan with a diameter of 10cm is spinning at 25 revolutions per minute clockwise. The fan's reference blade starts pointing directly upwards. Determine an equation for a sinusoidal function that represents the fan's reference blade's vertical distance from the ...
*May 1, 2015*

**chemistry**

What is the root mean square speed of argon gas at 300 K? 1. 4.33 × 102 m/s 2. 1.37 × 101 m/s 3. 3.96 × 102 m/s 4. 4.30 × 101 m/s 5. 5.92 × 102 m/s
*May 1, 2015*

**chemistry**

Given a percent yield of 45.0% for the reaction: H2 + Cl2 → 2 HCl(g) How many moles of HCl gas are produced if 15.5 L of Cl2 at STP and excess H2 are reacted? 1. 0.769 mol 2. 0.346 mol 3. 0.622 mol 4. 3.08 mol 5. 1.38 mol 6. 0.156 mol
*May 1, 2015*

**Social studies **

How did the Cold War affect South Carolina? A. Military bases were reopened or built in the state*** B. the Soviet Union became a trade partner C. Communism became a popular political system D. The state experienced an economic recession
*May 1, 2015*

**Social Studies**

Thank you:)
*May 1, 2015*

**Social Studies**

How did changes in society caused by world war 2 affect blacks? A. Public schools were desegregated during the 1940s B. Black soldiers returning from war no longer encountered discrimination C. For the first time blacks were needed for factory work*** D. Units such as ...
*May 1, 2015*

**P.E.**

sorry if u feel like that!
*May 1, 2015*

**P.E.**

It's Dependence!!
*May 1, 2015*

**P.E.**

___________________ is when the brain develops a chemical need for a substance Intoxication*** Withdraw Detoxification Dependence
*May 1, 2015*

**Chemistry**

Imagine that you have a 6.00L gas tank and a 3.00L gas tank. You need to fill one tank with oxygen and the other with acetylene to use in conjunction with your welding torch. If you fill the larger tank with oxygen to a pressure of 125atm , to what pressure should you fill the...
*May 1, 2015*

**P.E.**

thanks!! Sorry for me being silly.
*May 1, 2015*

**P.E.**

I now this! I looked it over and know I feel stupid!! It would be definitely definitely a!! I am sure, just to make sure am I right??
*May 1, 2015*

**P.E.**

OK!! Sorry:(:( I will Google the words and then try again.
*May 1, 2015*

**P.E.**

a person who wakes up after a night of binge drinking and feels nauseous and has a headache probably Has a hangover Has cirrhosis Is having a blackout Has a concussion***
*May 1, 2015*

**Chemistry**

Aluminum granules are a component of some drain cleaners because they react with sodium hydroxide to release both heat and gas bubbles, which help clear the drain clog. The reaction is 2 NaOH(aq) + 2 Al(s) + 6 H2O(ℓ) −→ 2 NaAl(OH)4(aq) + 3 H2(g) What mass of ...
*May 1, 2015*

**Chemistry**

305.3333
*May 1, 2015*

**Chemistry**

Nitric acid can be produced by the reaction of gaseous nitrogen dioxide with water. 3 NO2(g) + H2O(ℓ) −→ 2 HNO3(ℓ) + NO(g) If 916 L of NO2 gas react with water, what volume of NO gas will be produced? Assume the gases are measured under the same ...
*May 1, 2015*

**P.E.**

thx!!
*May 1, 2015*

**P.E.**

I checked the answers and I think it is B.
*May 1, 2015*

**P.E.**

yes Ms. Sue I do know what Intoxicated is. It is when someone drinks and loses their mind and change their behavior! BTW, thanks Dove but I would like Ms. Sue to confirm for me!
*May 1, 2015*

**P.E.**

A person suffered a head injury, was unconscious for a few minutes, and is now sleepy and disoriented. This person likely Is intoxicated*** Has a concussion Is having a seizure Has meningitis
*May 1, 2015*

**P.E.**

OK! I just realzied that i did not eter the answer choices correctly, they are suppose to be:- Is made up of the brain and spinal cord Links the body to the brain Is made up of sensory and motor neurons Is responsible for thought and reasoning
*May 1, 2015*

**P.E.**

is it a and c??
*May 1, 2015*

**P.E.**

thanks!
*May 1, 2015*

**P.E.**

The peripheral nervous system (Select all that apply) Is made up of the brain and spinal cord Links the body to the brain Is made up of sensory and motor neurons*** Is responsible for thought and reasoning***
*May 1, 2015*

**Language arts**

Whose attitude toward Scrooge is most severe
*May 1, 2015*

**ANT101 **

"In most situations, the first-born male has priority to inherit the chieftainship (primogeniture)" (Nowak & Laird, 2010, p. 177). Suppose you write the following in a post/paper: In most cases, the first-born male has priority to inherit the chieftainship (Nowak & ...
*May 1, 2015*

**ANT101 **

"In Tikopia, when the paramount chief dies, there is an election among the lesser chiefs to replace him" (Nowak & Laird, 2010, p. 177). Suppose you write the following in your post or paper: When a Tikopian chief who rules over other chiefs dies, the chiefs beneath ...
*May 1, 2015*

**ANT101 **

It is okay to use as many direct quotations as you want in a post/paper, as long as you properly acknowledge them. (Points : 1) No. You should use quotations sparingly to underscore your points, not to present a large body of information or make your points for you. Yes, you ...
*May 1, 2015*

**ANT101**

is it C
*May 1, 2015*

**ANT101 **

Which one of these is not the best way to provide in-text citation? (Points : 1) According to Jones (1998), "Students often had difficulty using APA style, especially when it was their first time" (p. 199). According to Jones (1998), the first time is the hardest ...
*May 1, 2015*

**Math**

So then could it be represented by pi(n)/2 ?
*May 1, 2015*

**Math **

How to find the asymptotes of k(x) = 0.5csc(2x)?
*May 1, 2015*

**math . **

louisville is 14 mi due north of farmville, stanton is due east of farmville, and louisville is 25 mi from stanton. how far apart are farmville & stanton? round to the nearest tenth (of a mile). -- im not sure how to do this problem
*May 1, 2015*

**Lang arts**

No he lied it can be both A or B.
*May 1, 2015*

**Math**

30.45
*May 1, 2015*

**physics**

a spherical balloon of diameter 2m is filled with helium.Assume STP .how much is contained in the balloon helium
*May 1, 2015*

**HEALTH (check answers)**

All right, i also took this quiz earlier, both of you are correct :)
*May 1, 2015*

**Science **

How does the structure of epithelial tissue function to prevent dehydration?
*April 30, 2015*

**Science**

What type of tissue do you think the wall of the villi is made from? Is it connective tissue or maybe epithelial tissue?
*April 30, 2015*

**Trigonometry**

Yes, the origin is an x-intercept here. So how can I find the y-intercept in a function such as y = -2 sin(x - (pi/2)). I want to know from where to begin graphing, from the minimum or maximum value.
*April 30, 2015*

**Trigonometry**

Suppose I'm graphing a graph like j(x) = -2 sin 4x. How can I tell if the origin is an x-intercept for it?
*April 30, 2015*

**Math 12**

What is the probability of being dealt four cards of a kind in a five card hand? I know it is 0.00024, but I need this as a fraction and I don't know how to do that.
*April 30, 2015*

**Science**

Does the circulatory system make hormones, or merely distribute them after they are made in endocrine tissues?
*April 30, 2015*

**Math**

Correction on answer choice B -8x^20 y^8*
*April 30, 2015*

**Math**

Which of the following expressions is equivalent to (-2x^5 y^2)^4 A. -16x^20 y^8 B. -8x^10 y^8 C. -8x^9 y^6 D. 16x^9 y^6 E. 16x^20 y^8
*April 30, 2015*

**Math**

Thank you Ms. Sue :).
*April 30, 2015*

**Math**

She would save an hour of actual driving time.
*April 30, 2015*

**Math**

Kaya drove 200 miles in 5 hours of actual driving time. By driving an average of 10 miles per hour faster, Kaya could have saved how many hours of actual driving time? A. 1 / 6 B. 2 / 3 C. 7 / 10 D. 1 E. 4
*April 30, 2015*

**math**

The ferris wheel shown makes 12 revolutions per ride.how far would someone travel during one ride
*April 30, 2015*

**Algebra 1**

4/y *16y^2=64y
*April 30, 2015*

**Math**

right on the second. wrong on the first. forget the 9 owed. his portion of the bill is 5 dollars, to that add your portion
*April 30, 2015*

**Math**

what is your thinking on this?
*April 30, 2015*

**algebra**

.98^(2012-2008)= put this in your google search window 80*0.98^(4)=
*April 30, 2015*