Friday

May 27, 2016
Total # Posts: 744

**Science**

If the earth exerts a 500 N gravitational force on an object in near space, how much force does this object exert on the earth, and by what law can this be asserted?
*May 18, 2016*

**Physics**

How would you change the following Galilean transformation equations in the case where a frame was moving both in the x and the y direction? (Use the following as necessary: x, y, z, Vx, Vy, t.) x' = y' = z' = t' =
*May 13, 2016*

**Physics**

Estimate the increase in rest energy of a copper sample [100 kg, c = 387 J/(kg · °C)] if its temperature is increased 100°C. -answer needs to be in kg please.
*May 13, 2016*

**social studies**

Summarize the ways which minnesotans contribute to WW2
*May 12, 2016*

**Math **

A rectangle has a width of 5 meters and length of 14 meters. If a similar rectangle has a width of 15 meters, what's its perimeter, in meters?
*May 10, 2016*

**Algebra**

3/8x + 180=3.5g
*May 6, 2016*

**math**

Range:9 Median:5 Mode:5
*May 6, 2016*

**Math**

y=10
*May 5, 2016*

**Math**

Find the missing number that completes the table of values what's the Function Objective a function table Example:y= X+2
*April 7, 2016*

**Physics**

A boy sliding down a frictionless plane inclined at an angles 35° with the horizontal. What is the acceleration of the book?
*April 2, 2016*

**Physics**

In Europe, the standard voltage is 230 V (rms), AC, and 50 cycles/s. Suppose you take your 5.00 W electric razor to Rome and plug it into the receptacle (with an adapter to fit the receptacle but not to change the voltage). (The standard voltage in the United States is 120 V (...
*March 26, 2016*

**English**

SUMMARIZE WHAT YOU HAVE WRITTEN AND TELL PEOPLE WHAT YOU WANT THEM TO REMEMBER IN YOUR WRITING.
*March 26, 2016*

**Math**

3 and seventh/eights on a ruler.
*March 8, 2016*

**Math**

On the ruler below, identify the location of 3 7/8
*March 8, 2016*

**Math**

On the ruler below, identify the location of 7 3 -- 8
*March 8, 2016*

**Organic Chemistry**

We used sodium dichromate in sulfuric acid to oxidize borneol to camphor. Suppose you needed to prepare benzaldehyde from benzyl alcohol. Would the sodium dichromate be the best choice for this oxidation or are there better choices? Explain.
*March 1, 2016*

**Science **

A 20 kg mass slides down an inclined plane which is at an angle of 60 degrees to the horizontal 1. Horizontal component of weight force 2. Vertical component of weight force 3. Angle 4. Normal force 5. Net fx 6. Acceleration along incline I really do not get how to do this, I ...
*March 1, 2016*

**Physics**

THANK YOU Scott!! You made my day.
*February 18, 2016*

**Physics**

A synchrotron radiation facility consists of a circular ring that has a 48.0 m radius and creates an electron beam with a current of 497 mA when the electrons have a speed approximately equal to the speed of light. How many electrons pass a given point in the accelerator per ...
*February 18, 2016*

**Physics**

There is current of 115 pA when a certain potential is applied across a certain resistor. When that same potential is applied across a resistor made of the identical material but 30 times longer, the current is 0.044 pA. Compare the effective diameters of the two resistors. d2...
*February 18, 2016*

**Physics**

A 14.1 μF capacitor is charged to a potential of 45.0 V and then discharged through an 80.0 Ω resistor. (a) How long after discharge begins does it take for the capacitor to lose 90.0% of the following? (i) its initial charge in seconds (ii) its initial energy in ...
*February 18, 2016*

**Math**

2.75 - 0.33 = 2.42 miles on the bus 2.42 * 2 = 4.84 miles 4.84 is the final answer Nick
*February 18, 2016*

**Physics**

A 500 g sample of gold heated to 971.0 deg. C is placed in a calorimeter containing 220 g of water initially at 20.0 deg. C. If no heat is lost to the surrounding environment what will the final temperature of the water be? [HINT: At the end, the sample will be in thermal ...
*February 16, 2016*

**Physics**

A cylinderical brass rod with a radius of 2.10 cm and length of 1.50 m is placed in a fire with temperature of 490 deg. C. If the other end of the rod is at a temperature of 33 deg. C, what is the rate of heat transfer through the rod (ignore any heat loss from the sides of ...
*February 15, 2016*

**P**

A 500 g sample of gold heated to 971.0 deg. C is placed in a calorimeter containing 220 g of water initially at 20.0 deg. C. If no heat is lost to the surrounding environment what will the final temperature of the water be? [HINT: At the end, the sample will be in thermal ...
*February 15, 2016*

**Physics**

A styrofoam cooler is a cube with side length of 20.0 cm and walls with thickness of 1.9 cm. If the external temperature is 27.0 deg. C and the cooler contains ice and water at 0 deg. C. How much heat is transferred into the box in 24 hours? - I got 2.95x10^5 J for this and it...
*February 15, 2016*

**Physics**

I have a few physics questions that I don't understand. Two are thermal expansion problems and the other is an ideal gas law problem. 1. Two rods, one made of iron and the other of aluminum, have the same initial length at 64.00 deg. C? When the temperature drops to 4.00 ...
*February 8, 2016*

**math**

idk the answer
*February 8, 2016*

**Physics**

Charge A, +1 μC, is positioned at the origin of a coordinate system as shown below. Charge B, −1 μC, is fixed at x = 3 m. (a) Determine the magnitude and direction of the force that charge B exerts on charge A. (b) What is the force that charge A exerts on ...
*January 29, 2016*

**Physics**

Charge A, +1 μC, is positioned at the origin of a coordinate system as shown below. Charge B, −1 μC, is fixed at x = 3 m. (a) Find the electric field on the x axis at x = 6 cm. (b) At what point on the x axis is the electric field zero?
*January 29, 2016*

**Physics**

(a) Estimate the positive charge in you due to the protons in the molecules present in your body. (Assume that the human body is made entirely out of water.) (b) What is the net charge in your body?
*January 29, 2016*

**Physics**

Tarzan (80 kg) runs toward a vine at 4.8 m/s where Jane (60 kg) is hanging on. He jumps and grabs the vine. How high does the vine swing? If the vine is 25 m long, how much of an angle does that make?
*January 28, 2016*

**physics**

A 10 kg mass moving at 6 m/s strikes a stationary 2 kg mass in an elastic collision. Determine the velocity of each after the collision. 10(6)+2(0)=(10)Vf1+(2)Vf2 60=(10)Vf1+(2)Vf2
*January 28, 2016*

**Algebra**

A colony of bacteria has a population of ten initially, and doubles in size every three hours. What is the population of the colony after 24 hours of growth ?
*January 24, 2016*

**geometry**

two boards make up two sides of triangular sandbox 8ft and 5 ft what size board makes third side? I say 5 because this makes an isoles triangle
*December 16, 2015*

**Geometry 12**

F is the center point. I have the same question and I'm really confused.
*December 14, 2015*

**Math **

I am a common multiple of 8 and 2. I am greater than 50 and my digits are 3 apart. What am I?
*December 7, 2015*

**Writing**

Just look back in the story to answer this essay!
*November 20, 2015*

**Physics**

Damon, thanks but is that for A or B and what is the answer, please star it or underline it or something that it shows the final answer for it.
*November 20, 2015*

**Physics**

A set of density rods is designed to illustrate the concept of density. The idea is to create cylinders of equal diameters and masses, but varying lengths, to show which have the largest and smallest densities. (a) Derive a formula that will predict the ratio of the length of ...
*November 20, 2015*

**multiple choice economics**

D. A good that is perceived as a necessity will be purchased even if the price rises. People will buy anything if it is a necessity like bread, milk or gas for their car, no matter how much money it costs.
*November 19, 2015*

**Physics**

They also said Derive a formula that will predict the ratio of the length of one rod to the length of another rod. Assume the radius and mass of each cylinder is the same and express your answer in terms of the specific gravity of each rod. (Use the following as necessary: SG1...
*November 19, 2015*

**Physics**

Density of lead is 11.36g/cm3 and density of brass is 8.553g/cm3 but I was not given the lenghts of anything. The info above was the only thing given to me.
*November 19, 2015*

**Physics**

How do I do that to answer my question?
*November 19, 2015*

**Physics**

A set of density rods is designed to illustrate the concept of density. The idea is to create cylinders of equal diameters and masses, but varying lengths, to show which have the largest and smallest densities. How do I do it?
*November 19, 2015*

**Physics**

If you want to design a set of five density rods (made of aluminum, iron, copper, brass, and lead), determine the ratios of the lengths of each rod to the length of the lead rod, the densest material in the group. The specific gravities of the elements are approximately SG ...
*November 19, 2015*

**spanish**

I have the same question and I don't know the answer! can you help me?
*November 14, 2015*

**Math (Algebra)**

Two groups went to the movies. The first group included 3 adults and 5 kids and paid a total of $71. The second group included 5 adults and 3 kids and paid a total of $81. If ticket prices were the same for each group, find the cost of each type of ticket.
*November 5, 2015*

**health**

it's B all the way!
*November 2, 2015*

**Math**

Thank you.
*October 27, 2015*

**Math**

would the answer be: A=1*W 18x24 = 432
*October 27, 2015*

**Math**

How many 1 inch squares can be cut from an 18"x24" piece of contruction paper
*October 27, 2015*

**Physics**

A spring that has a spring constant of 150 N/m is oriented vertically with one end on the ground. (a) What distance does the spring compress when a 4-kg object is placed on its upper end? in m. (b) By how much does the potential energy of the spring increase during the ...
*October 23, 2015*

**chemistry!!!!!!!!!**

at 20°C the concentration of O2 in the air is 8.65 x10-3 mol/L. what us the minimum volume of air in litres that are required to completely combust on e litre of gasoline at 20°C? Assume the gasoline is octane which has a density of .703 g/mol at this temperature. The ...
*October 19, 2015*

**Physics **

At t=0 a particle leaves the origin with a velocity of 5.0 m/s in the positive y direction, its acceleration is given by a=3i-2j m/s^2 At the instant the particle reaches its maximum y coordinate, how far is it from the origin? I'm not sure how to do a question like this, ...
*October 17, 2015*

**science**

I have a question from an old exam that I need help to understand, i'm not sure where to start An electron in an electronically excited hydrogen atom undergoes a transition from a 6d to a 2p orbital, resulting in the emission of a photon. The photon strikes a metal surface...
*October 16, 2015*

**Chemistry **

I have a metal sheet of indium, and when a uv light with a wavelength of 265 nm is shone on it the surface ejects electrons that have a kinetic energy of 8.31x10^-20 J per ejected electron. I'm asked to find the threshold frequency, I need to know how to find it.
*October 14, 2015*

**chemistry**

Mercury and gallium
*October 14, 2015*

**science**

The concentration of sodium chloride in ocean water is on average 0.060 M. What mass of sodium chloride is present in 25 L of ocean water? How do I answer this question, I have no idea where even to start.
*October 14, 2015*

**biology**

why is anaphase the shortest stage in the cell cycle?
*October 14, 2015*

**Algebra**

a). The length of the classroom is 30 ft. The length of the room on the scale drawing is 6 in. Is this correct? Explain why or why not. Michael has made a scale drawing of his classroom. The scale for his drawing is 0.5 in. : 3 ft. b). One of the student tables is 6 ft long. ...
*October 4, 2015*

**Social Stuides**

I forgot to include my URL's, sorry. (Use website prntscr dot com) 8lje58 And 8ljefd
*September 28, 2015*

**Social Stuides**

Write a paragraph telling how each excerpt below reflects U.S. values and the conflicts between ideals and reality.
*September 28, 2015*

**Physics**

Using GRAPHICAL METHOD, find the vector sum of a force of 20 N directed 60 degrees east of north and a force of 60 N directed west? Please show all steps and equations used.
*September 19, 2015*

**Physics**

"a vector r has a magnitude of 18 units and makes a 30 degree angle with respect to the x axis. find the vector components of r using a protractor and some graph paper to verify your answer by drawing r and measuring the length of the lines representing its components.&...
*September 14, 2015*

**Physics**

An object travels with a constant acceleration for 10 s. The vectors in Figure 3-41 represent the final and initial velocities. carefully graph the x component of the velocity versus time, the y component of the velocity versus time and the y component of the acceleration ...
*September 11, 2015*

**Physics**

An object travels with a constant acceleration for 10 s. The vectors in Figure 3-41 represent the final and initial velocities. carefully graph the x component of the velocity versus time and the y component of the acceleration versus time, in a Vx vs t graph, a Vy vs t graph ...
*September 11, 2015*

**Algebra**

A Car is moving at an average speed of 60 km/h. Find the algebraic expression for the kilometer it would travel in y minutes. Comment on this question: Hello, for me, algebra is one of the hardest subjects at school. Most of the time I read a question over and over again but I...
*September 4, 2015*

**Physics**

A black mamba snake has a length of 4.3 m and a top speed of 8.9 m/s! Suppose a mongoose and a black mamba find themselves nose to nose. In an effort to escape, the snake accelerates at 20 m/s2 from rest. (a) How much time does it take for the snake to reach its top speed? (b...
*August 29, 2015*

**Physics**

A jet takes off from SFO (San Francisco, CA) and flies to YUL (Montréal, Quebec). The distance between the airports is 4100 km. After a 0.81-h layover, the jet returns to San Francisco. The total time for the round-trip (including the layover) is 13.9 h. If the ...
*August 29, 2015*

**Physics**

A Bugatti Veyron 16.4 can accelerate from 0 to 60 mi/h in 2.4 s. The Saleen S7 Twin Turbo goes "from 0 to 60" in 2.8 s. Determine the distance that the Bugatti Veyron would travel in the time it takes to reach 75 km/h, the speed limit on many Canadian roads. Compare ...
*August 29, 2015*

**Math**

Deshawn and Luke had an equal number of stickers. After Deshawn used 26 stickers and Luke lost 38 stickers,Deshawn had twice as many stickers as Luke. How many stickers did each of them have?
*August 26, 2015*

**math**

Find the simple interest and the final value of the deposit that earns the given rate for the indicated length of time. Round your answers to the nearest cent. $8439 earning 8% for 1.4 years ?
*August 5, 2015*

**math**

The cost C in dollars of having an electrician come to your house to do a repair job in h hours if he charges $16 for coming to the house and $30 for each hour.
*August 5, 2015*

**Mathematics**

I subtracted the $320.09 by $11.20 but I wasn't sure so I added all the deductions and subtracted that by the $320.09..
*August 5, 2015*

**math**

I think it is c.
*June 20, 2015*

**math**

4d(2d-9) a.) 8d-36d b.) -d c.) -28d^2 d.) 8d^2-36d
*June 20, 2015*

**math**

-3m(m+8) a.) -3m^2 + 24 b.) 3m^2 - 24m c.) -24m^2 d.) -4m + 5
*June 20, 2015*

**math**

1. (9m + 6) + (–5m – 6) 4m + 12 14m + 12 14m – 12 4m 2. (3r^2 + 7r + 1) + (4r^2 – 8r – 2) 7r2 + 15r – 1 7r2 – r – 1 7r2 – 15r – 3 –r2 – r – 1 3. (6h + 1) – (9h + 4) –3h – 3 15h – 5 –3h + ...
*June 1, 2015*

**grammer**

Which best describes the underlined group of words? Then it was time for Karla, my sister's best friend, to fly home. my sisters best friend is underlined A. adverb phrase B. misplaced modifier C. appositive phrase D. adjective phrase i think its c
*May 28, 2015*

**science**

An electric stove transfers heat too a pot by a.) conduction b.) convection c.) radiation d.) friction
*May 21, 2015*

**math**

8000+695832=
*May 20, 2015*

**math **

what is 3256/9
*May 11, 2015*

**Math**

A bag of five apples contains three ripe apples and two rotten apples. If a ripe apple is selected first, what is the probability that a second apple selected is rotten?
*May 9, 2015*

**Math**

Is this independent or not. Carlos tosses a coin that comes up heads. Jennifer tosses a coin that also come up heads.
*May 9, 2015*

**Math**

Math: Is this statement independent or not. Jordan stayed up late last night watching television. Jordan did poorly in his quiz in the morning.
*May 9, 2015*

**Chemistry**

Is Dr. Bob saying No/N=Kt After finding the constant (1.38?)=k 100/25=1.38t 4=1.38t 2.89=t ???? That's what I got and it doesn't seem right to me.
*May 8, 2015*

**Math**

How do I figure out what quadrilateral has 90 90 125 65 digrees on each side?
*May 7, 2015*

**math**

If you roll a pair of number cubes 50 times, what would be the experimental probability of P(odd and odd)
*May 4, 2015*

**science**

hello
*May 4, 2015*

**science **

hey is there anybody to talk to out there like ms sue
*May 4, 2015*

**math**

hello
*May 1, 2015*

**math**

hello can i talk to you
*May 1, 2015*

**math**

hey ms sue can i talk to you
*May 1, 2015*

**math**

hello
*May 1, 2015*

**math**

what is 3,563-3,957
*May 1, 2015*

**math**

what is 236?/3
*May 1, 2015*

**math**

what is 3,563- 3,957
*May 1, 2015*

**math**

thanks you so much i made a 100.
*May 1, 2015*

**math **

what is 630/3
*May 1, 2015*