Friday

July 25, 2014

July 25, 2014

Total # Posts: 1,832

**Lang Arts**

There is not right a wrong answer but think wisley :)

**Lang Arts**

Yes ms.sue will help you (sorry)

**Lang Arts**

Context clues. Ms.sue cannot give you the answers Jamin Go back in the story and use context clues

**Math**

a factory has a machine which bends wire at a rate of 8 units of curvature per second. how long does it take to bend a straight wire into a circle of radius 5?

**math**

238x123= ?

**social studies**

thank you

**social studies **

i need 5 major events that occurred during presidency of Franklin pierce. And i need 3 major accomplishments during presidency of Franklin pierce

**science**

yes they do to see if their hypothesis is correct

**science**

scientist do experimental tests more than once

**math**

5t=t-7

**business**

In what ways do different ideologies and political systems influence the environment in which MNCs operate?

**Computer Science: NQC**

Write a complete NQC program that spins for 2 minutes a Lego motor connected to the RCX output port B.

**math**

20.007 in expanded form

**math**

Using the equation y=(3x+2)(x+2) determine the x intercepts, the axis of symmetry and the vertex. I changed this equation into factored form because originally it was in standard form. Im having trouble with the x-intercepts. I want to say -2, -2 but I know that can't be r...

**5th Grade Math**

20.007 in expanded form

**math**

I think i need to explain this method using SOH CAH or TOA

**math **

lets say you have a tree or a flagpole. Describe how you would measure this object using right angled triganometry

**math trig**

I think i have to use soh cah toa instead of similar triangles

**math trig**

lets say you have a tree or a flagpole. Describe how you would measure this object using right angled triganometry

**math**

round each to the place indicated

**math**

76

**social studies**

Is the former name of the Democratic Republic of the Congo Zaire?

**math**

name three numbers less than 20 that cannot be arranged into arrays with two rows

**physics **

A train is speeding along a straight, level track at +20.0 m/s when the engineer applies the brakes, which results in an acceleration of -0.894 m/s2 as long as the train is in motion. How far does the train move during the 70 sec after the brakes are first applied?

**Math**

In X over 8 = 2 how do i find X?

**vectors **

A sailboat is out on the water for a cruise. First it sails at a rate of 4.93 m/s, at an angle of 120.0° for a period of 65.0 minutes. The wind then shifts and the vessel makes progress at a rate of 2.19 m/s, at an angle of 85°, for a period of 35.0 minutes. What is th...

**math**

Triangle ABC is similar to triangle FGH. Angle A measures 42 degrees. Angle G measures 49 degrees. Find the measure of angle H

**College Chemistry**

The sun bombards the earth with about 1KJ m^-2s^-1. Calculate the maximum mass of pure ethanol that can be vaporized in 10 min from a beaker left in strong sunshine, assuming the surface area of the ethanol t be 50cm^2.

**math**

Express 3/8 as decimal number

**Physics**

I've found that: v(f)^2 = v(i)^2 -2g(y - y(i)) gives me 17.2 m/s. However, this way doesn't account for the angle, so I don't think it's the right way to solve this.

**Physics**

I've been using: v(f)^2 = v(i)sin(45)^2 - 2g(y-y(i)) Then I use: v = sqrt((v(f)^2 + v(i)^2) However, doing this gives me 18.6 m/s instead of 17.2 m/s. Any help would be greatly appreciated.

**Physics**

3. A projectile is launched at 10.0 m/s in a direction 45.0 degrees above the horizon. It hits the ground 10.0 m below its initial position. What is its speed just before hitting the ground? Ignore air resistance. The answer is supposed to be 17.2 m/s.

**Physics**

Three masses that are 10 kg each are located at the corners of an equilateral triangle, with side length of 0.55m. What is the magnitude of the total force acting on one mass due to the other two masses? The answer is supposed to be 3.82e-08 N. Any help is appreciated. I'm...

**chemistry**

Suppose you mix 50 grams of CO and 10 grams of H2. How many grams of methanol can be produced?

**science**

A shoe case weighing 40 lb is located on a scale inside a moving elevator that is going upward with the speed of 8 m/s. At time T1 elevator slows down with the acceleration of 3 m/s2 until the time T2. What are the the readings of the scale at T2 and T1 respectively?

**chemistry**

When do phase transitions occur in molecules?

**Physics**

I tried using a method similar to yours earlier, but I got around 70 to 80 degrees C when using it, so I tried another method. I get the same answer of 24.6C when using my method, so I'm confused as to why you don't like it. Also, when I use the specific heat of mild s...

**Physics**

The answer is supposed to be 27 degrees C; however, I keep getting 25 degrees C. Could someone check my method? m(w)c(w)T(iw) + m(s)c(s)T(is) = m(w)c(w)T(f) + m(s)c(s)T(f) where m(w) is the mass of the water, c(w) is the specific heat of water in cal/(g K), m(s) is the mass of...

**Physics**

A 2.0-kg piece of steel with a temperature of 70°C is submerged in 1.0 kg of water at 15°C. At what temperature does the water/metal system reach equilibrium? The specific heat of steel is 0.107 cal/(g × K)."

**Physics**

Which one of the following will form a standing wave: (1) two waves of the same amplitude and speed moving in the same direction (2) two waves of the same amplitude and speed moving in the opposite directions, (3) any two traveling waves can form standing wave if they have sam...

**Physics**

Two cylindrical rods are made of the same material and have the same length but one is hollow and other is solid. Both are heated to same increase in temperature. Which rod expands more? From my understanding of linear thermal expansion, linear thermal expansion only depends o...

**cis 324**

You are an information security manager for a large retail sporting goods store. The sporting goods store is involved in the following in which they: •Maintain an internal network and an intranet protected by a firewall •Maintain a Web server in the DMZ that is prote...

**Physics**

The table gives the specific heat of lead as 0.129 KJ/(kgK) and 0.0308 cal/(gK).

**Physics**

I tried using: .7E = 1/2mv^2 - cm(dT) However, I do not know the total energy of the system, so I can't finish the problem this way.

**Physics**

A 19-g lead bullet is shot with a speed of 340 m/s into a wooden wall. Assuming that 70% of the kinetic energy is absorbed by the bullet as heat (and 30% by the wall), what is the final temperature of the bullet? (Assume the bullet is initially at room temperature of 20°C....

**Physics**

I forgot that 70g was 0.07 kg. I was using 0.007 kg. Thank you. This question makes a lot more sense now.

**Physics**

I'm getting -25.1 g when I use this equation.

**Physics**

Suppose 100 g of water at 20°C is poured over a 70-g cube of ice with a temperature of -8°C. If all the ice melts, what is the final temperature of the water? If all of the ice does not melt, how much ice remains when the water–ice mixture reaches equilibrium? I&#...

**Physics**

The equation I found in my text book doesn't mention time being a factor when calculating R. I have R= L/k where L is length and k is thermal conductivity.

**Physics**

Thank you! Could you write out just the basic equation that you used?

**Physics**

The thermal conductivity of fiberglass batting, which is 8.9 in thick, is 8.6 10-6 BTU/(ft °F s). What is the R value (in ft2 °F h/BTU)? The R value is 24 ft^2 Fh/BTU. How do I get this answer?

**Physics**

A comet orbits the Sun with a period of 72.0 yr. (a) Find the semimajor axis of the orbit of the comet in astronomical units (1 AU is equal to the semimajor axis of the Earth's orbit). (b) If the comet is 0.60 AU from the Sun at perihelion, what is its maximum distance fro...

**Calculus**

The Estradas are planning to buy a house 5 years from now. Housing experts in their area have estimated that the cost of a home will increase at a rate of 3%/year during that 5-year period. If this economic prediction holds true, how much can the Estradas expect to pay for a h...

**Physics**

I see where my mistake was. I multiplied in the pi when I wasn't supposed to. This question had an obvious answer.

**Physics**

Any help is appreciated.

**Physics**

A sinusoidal wave traveling on a string is moving in the positive x-direction. The wave has a wavelength of 6 m, a frequency of 48 Hz, and an amplitude of 9 cm. What is the wave function for this wave? (Use any variable or symbol stated above as necessary.) I know the answer i...

**Physics**

Thank you! I was able to figure out the correct answer. However, in this case shouldn't (.011^2) be (.011/2)^2?

**Physics**

The tension in a 2.6-m-long, 1.1-cm-diameter steel cable (ρ = 7800 kg/m3) is 860 N. What is the fundamental frequency of vibration of the cable? The answer is 6.55 Hz. I know that I'm going to use the formula: f=nsqrt(T/4L^2u) However, I'm not sure how to get the ...

**Physics**

Also, shouldn't f=48.9 m be f=48.9 Hz?

**Physics**

Thank you. I guess WebAssign made a mistake.

**Physics**

I'm not really sure how to figure out part (b); however, I'm sure that it's answer relies on me figure out part (a) correctly.

**Physics**

For part (a) I've been doing the following work: u=M/L; where u= mass per unit length u=(0.011)/(.48)= 0.022916667 v= sqrt(T/u); where T = tension v= sqrt(50.5/0.022916667) = 47.0 m/s

**Physics**

A 48-cm-long wire with a mass of 11.0 g is under a tension of 50.5 N. Both ends of the wire are held rigidly while it is plucked. (a) What is the speed of the waves on the wire? (b) What is the fundamental frequency of the standing wave? The answers are 50.5 m/s and 48.9 Hz re...

**Physics**

A string is 37.5 cm long and has a mass per unit length of 5.95 10-4 kg/m. What tension must be applied to the string so that it vibrates at the fundamental frequency of 612 Hz? The answer is supposed to be 125 N, but I'm not sure how to get this answer. So far, I have fou...

**distance 2 cars **

if car A is going 40 mph and car B is stationary , how fast would car b have to go to cath up to car A in 4/10 of a mile

**Physics**

A 3-kg mass attached to a spring with k = 145 N/m is oscillating in a vat of oil, which damps the oscillations. (a) If the damping constant of the oil is b = 14 kg/s, how long will it take the amplitude of the oscillations to decrease to 1% of its original value? (b) What shou...

**Stats**

In a study of children with a particular disorder, parents were asked to rate their child on a variety of items related to how well their child performs different tasks. One item was "Has difficulty organizing work," rated on a five-point scale of 0 to 4 with 0 corre...

**Stats**

Thank you!

**Stats**

You want to rent an unfurnished one-bedroom apartment in Boston next year. The mean monthly rent for a random sample of 14 apartments advertised in the local newspaper is $1200. Assume that the standard deviation is $230. Find a 95% confidence interval for the mean monthly ren...

**Probability & Statistics**

You want to rent an unfurnished one-bedroom apartment in Boston next year. The mean monthly rent for a random sample of 14 apartments advertised in the local newspaper is $1200. Assume that the standard deviation is $230. Find a 95% confidence interval for the mean monthly ren...

**Physics**

One of the related questions helped me. Thank you Jiskha!

**Physics**

When a mass is attached to a vertical spring, the spring is stretched a distance d. The mass is then pulled down from this position and released. It undergoes 53 oscillations in 30.6 s. What was the distance d? The answer is supposed to be 8.28 cm. How can I get this answer? T...

**physics**

Suppose a cars brakes can produce an acceleration of -7m/s^2. If the car is traveling at an initial speed of 28m/s, what is the minimum distance necessary to stop the car?

**Economics**

I believe the answer is A

**Algebra**

At what time between 7 and 8 on an analog clock do the hour and minute hand overlap?

**Physics**

Thank you! By the way, using 101325 instead of 1.01e+05 and using pi instead of 3.14 gives a more accurate answer. Using these values gives me 80425.39066 N, which rounds down to 80400 N.

**Physics**

I have tried to follow the similar problem under the "related questions", but I get 5.29e+6 N from doing it this way.

**Physics**

In a hydraulic lift, the maximum gauge pressure is 16.70 atm. If the diameter of the output line is 24.6 cm, what is the heaviest vehicle that can be lifted? The answer is 80400 N. How do I get this answer? Isn't weight measured in kg? Thank you in advance.

**Physics**

A wooden block floating in seawater has two thirds of its volume submerged. When the block is placed in mineral oil, 10% of its volume is submerged. ( a) Find the density of the wooden block. (The density of seawater is 1.024 g/cm3.) (b) Find the density of the mineral oil.

**Math**

p=80000, r=10.5, t=15, m=12

**Physics**

A comet orbits the Sun with a period of 72.0 yr. (a) Find the semimajor axis of the orbit of the comet in astronomical units (1 AU is equal to the semimajor axis of the Earth's orbit). (b) If the comet is 0.60 AU from the Sun at perihelion, what is its maximum distance fro...

**Physics**

Eris, the largest dwarf planet known in the Solar System, has a radius R = 1200 km and an acceleration due to gravity on its surface of magnitude g = 0.77 m/s2. (a) Use these numbers to calculate the escape speed from the surface of Eris. (b) If an object is fired directly upw...

**Writing/BME**

I meant to say "The material's tolerance to stress..." not "The material tolerance."

**Writing/BME**

As strength is defined as the amount of stress a material can withstand before fracturing, the material used to construct a toric lens should have a relatively high tolerance to stress. The material tolerance to stress should be relatively high when facing each type of stress,...

**Writing/BME**

Strength is defined as the amount of stress a material can withstand before fracturing. Therefore, the more strength a material has, the more durable it is. Thus, a toric lens should be constructed from a material with high strength. Every time I read this to myself, it sounds...

**Physics**

I'm getting a negative answer when I checked your math. Also, shouldn't the mass of the rock be considered?

**Physics**

Standing on the surface of a small spherical moon whose radius is 6.30 104 m and whose mass is 8.00 1018 kg, an astronaut throws a rock of mass 2.02 kg straight upward with an initial speed 42.2 m/s. (This moon is too small to have an atmosphere.) What maximum height above the...

**statistics**

A firm has 30% of its service calls made by a contractor, and 15% of these calls result in customer complaints. The other 70% of the service calls are made by their own employees, and these calls have a 5% complaint rate. Use Bayes’ theorem to find the probability that a ...

**statistics**

In a statistic class, 10 scores were randomly selected with the following results were obtained: 74, 73, 87, 57, 71, 68, 65, 77, 67, 66. What are the inner fences? What is the coefficient of variation?

**Physics**

Suppose a new extrasolar planet is discovered. Its mass is double the mass of the Earth, but it has the same density and spherical shape as the Earth. How would the weight of an object at the new planet's surface differ from its weight on Earth? (Let Wnew be the weight of ...

**Physics**

A ladder of mass 39.4 kg and length 2.88 m is leaning against a wall at an angle θ. The coefficient of static friction between ladder and floor is 0.282; assume that the friction force between ladder and wall is zero. What is the maximum value that θ can have before ...

**business finance**

Hot Wings, Inc., has an odd dividend policy. The company has just paid a dividend of $11.25 per share and has announced that it will increase the dividend by $9.25 per share for each of the next four years, and then never pay another dividend. Required: If you require a 13 per...

**physics**

Now I'm getting over 1000. However, I may be reading your explanation wrong. I'll reread your explanation again.

**Physics**

Thank you for the help. I managed to get the correct solution.

**Physics**

I forgot about the negative. Thank you!

**Physics**

The quadratic equation is not really working. I keep getting imaginary numbers from the negative under the radical.

**Physics**

Thank you. I completely forgot about the quadratic formula.

**Physics**

A track has a height that is a function of horizontal position x, given by h(x) = x^3 + 4x^2 − 44x + 16. Find all the positions on the track where a marble will remain where it is placed. What kind of equilibrium exists at each of these positions? (Enter your answers fro...

**Physics**

Thank you so much! I've been trying to figure this one out for a few hours.

**Physics**

A uniform rigid pole of length L and mass M is to be supported from a vertical wall in a horizontal position, as shown in the figure. The pole is not attached directly to the wall, so the coefficient of static friction, μs,between the wall and the pole provides the only v...

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