# Posts by jake

Total # Posts: 2,241

**Physics**

Water flows through a pipe of radius 4 cm at a rate of 3.5 m/s. Suppose each water molecule is singly ionized (highly unrealistic). a) What is the electric current density associated with the flow of these ions? b) What is the electric current in the pipe?

**Physics**

An electric filament can heat 200 cm^3 of water from 5°C to 95°C in 6 minutes. If the voltage source is a 12 V battery, how much current does it draw?

**US Government**

Thank you!

**US Government**

The President can choose to get rid of democracy. A) True B) False (the correct answer?)

**Washington state history**

ok thanks

**Washington state history**

please help. Which industries remain as important to Washington’s economy today as in the 1800s? Select all that apply. A.biotech B.entertainment C.forestry D.mining E.software development F.tourism

**washington state his**

thank you

**washington state his**

please help. Which of the following best identifies how Washington’s economy changed overall after World War II? A.It scaled back agricultural production. B.It shut down most manufacturing operations. C.Its activities became more diverse. D.Its dependence on foreign trade...

**Math**

The length of a rectangle is 5 meters more than twice the width, and the area of a rectangle is 42 square meters. Find the length and width of the rectangle.

**Math**

At the city museum, child admission is $5.40 and adult admission is $9.30. On Friday, 134 tickets were sold for a total of $957.60. How many adult tickets were sold that day?

**physic**

Sample 1, Original Length 250 mm and 10 mm Diameter, Length after testing 250.23 mm the force used for the test was 15KN Sample 2, Original Length 250 mm and 14 mm Diameter, Length after testing 250.21 mm the force used for the test was 15KN 1. Calculate the Stress and Strain ...

**chemistery**

explain the progress of the reaction in terms of kinetic energy explain how various factor affect the rate of reaction

**Math calculus**

a cylindrical vat must hold 5m^3, the vat must be wider than it is tall, but no more than 3 m in diameter. What dimensions will use the least amount of material?

**Science**

If a 1 tonne car travels at 16.7 m/s (60km/h) then it would have a momentum of

**Social studies**

To what extent should canadians try to stop human rights abuse in other countries today?

**Chemistry**

what is the oxidation number of Carbon in C6H12? thank you!

**Art Help Just a little**

Yes the answer is 100% correct

**Art Help Just a little**

Lets hope this answer is right if not i will correct it.

**science**

what is the molar ratio between barium hydroxide and potassium hydrogen phthalate if they were reacted together in an acid base titration

**math**

Find the exact values for the lengths of the labeled segments a, b and p. Note that r=3 is the radius of the circle, and s=2 is the arc length from the point (3,0) around the circle to the indicated point.

**Johnson**

A perimeter of EFGH is 100cm.what is the length of side FE?

**reading**

Like the main events

**reading**

Well she said it didn't made sense and didn't had important parts about the chapter.

**reading**

Sorry for the misunderstanding what i meant is what are important parts to put in the summary because i read the book and did the summary but my teacher said it was bad.

**reading**

What is a summary for chapter 2 slam by Walter dean Myers

**Math**

There are two triangles for which A=30?,a=5,and b=8 The larger one has c= ? and the smaller one has c= ?

**Simple interest**

Charlotte borrows $9000 over 5 years to buy a second hand car. The loan must be repaid over 5 years at 12% p.a. simple interest calculate the monthly repayment if the payments are spread equally over the 5 years.

**physics**

An alpha particle (charge = +2.0e) is sent at high speed toward a gold nucleus (charge = +79e). What is the electric force acting on the alpha particle when the alpha particle is 3.3 ? 10-14 m from the gold nucleus?

**Chemistry**

If you wanted to create a equimolar buffer using 1.0 mol of NaHS in 1.0L of water what acid would you need to add? how many moles of that acid do you need to add?

**unit 1 lesson 13 the human body**

does any one know the answers for the unit 1 lesson 13 quize for cathalena ward

**Science**

correct answers has correct answers. (100%) hahah

**Social studies**

did u ever do it?

**MATHS**

The quadratic function f(x) has roots at x=4 and x=-2 and has value of 2 at x=0. Does f(x) have a minimum or maximum? Find the value of the /minimum/maximum value of f(x).

**physics**

A long straight vertical wire of diameter 2.0mm carries a steady current upwards. At 30mm from the centre of the wire, the magnetic field strength is 0.10mT. Sketch a graph to show the variation of magnetic field strength from the wire surface to a distance of 40mm from the ...

**physics**

An unstable nucleus with a mass of 18.0 ? 10-27 kg initially at rest disintegrates into three particles. One of the particles, of mass 5.0 ? 10-27 kg, moves along the positive y-axis with a speed of 9.0 ? 106 m/s. Another particle, of mass 7.4 ? 10-27 kg, moves along the ...

**physics**

Two cars (A and B) of mass 1.1 kg collide. Car A is initially moving at 18 m/s, and car B is initially moving in the opposite direction with a speed of 9 m/s. The two cars are moving along a straight line before and after the collision. (Enter the magnitudes.) If the two cars ...

**physics**

How much heat is absorbed by a 30g iron skillet when its temperature rises from 24oC to 93oC? Joules do i addition everything?

**physical science**

How much heat is absorbed by a 30g iron skillet when its temperature rises from 24oC to 93oC? Joules do i addition everything?

**Math**

How many 4/5-foot planks can be cut from a board which is 12 feet long?

**math**

If a jet flies at a speed of 600 km/h, how many meters does it fly in 10 seconds? There are 1000 meters in 1 km

**Math**

you guys are just a peacie of it spam omg you guys can get sewed and everything .l

**hypothesis**

Because it is just an idea that has to be proven to know that it is true.

**hypothesis**

Here is google definition for Hypothesis- a supposition or proposed explanation made on the basis of limited evidence as a starting point for further investigation.

**Geography**

Search google there is many examples of link canals.

**geometry**

Look at the questions that were previously answered below I think they will help you solve this.

**Math- fractions**

Multiply both of the fractions to make the denominators the same. For example 2/3 *4/4 and 3/4 * 3/3.

**science**

Which one do you think will help protect the environment? I would discard 1 and 4.

**Calculas**

(x?¹-1) / x-1

**Calculas**

lim (x?¹-1)?x-1 as x approaches 1. I know the answer is -1 but I am not sure how to solve the numerator x?¹-1.

**Science**

well i was hoping someone could some how paste the questions in cause i cant seem to copy from the assessment

**Science**

lesson 9: energy and the environment unit test science 8 A Unit 4: Energy and the environment Please HELPPPPPP!!!!!!!

**calculus**

find the maximum and minimum value of the function f(x)= x-x^3 on the interval [-2,2] I also need help with this question What is the largest possible product of two negative number whose sum is 1?

**Physics**

5. If a wave has a wavelength of 20m and a speed of 100 m/s, what is the period of the oscillation? v = wavelength / period 100 = 20 / period 100*20 = periodperiod = 20 / 100 2000 s = period OR period = 20 / 100 period = 0.2 s I don't know which one is correct, please help?!

**Physics**

1. A rectangular coil 0.065 m by 0.080 m is positioned so that its cross-sectional area is perpendicular to the direction of a magnetic field. The coil has 66 turns and a total resistance of 7.6 ? and the field decreases at a rate of 2.5 T/s. What is the magnitude of the ...

**Physics -HELP**

1. A rectangular coil 0.065 m by 0.080 m is positioned so that its cross-sectional area is perpendicular to the direction of a magnetic field. The coil has 66 turns and a total resistance of 7.6 ? and the field decreases at a rate of 2.5 T/s. What is the magnitude of the ...

**Physics -HELP**

A rectangular coil 0.065 m by 0.080 m is positioned so that its cross-sectional area is perpendicular to the direction of a magnetic field. The coil has 66 turns and a total resistance of 7.6 ? and the field decreases at a rate of 2.5 T/s. What is the magnitude of the induced ...

**Physics -HELP**

Do we have to find EMF?

**Physics -HELP**

A coil with 337 turns of wire, a total resistance of 47 ?, and a cross-sectional area of 0.35 m2 is positioned with its plane perpendicular to the field of a powerful electromagnet. What average current is induced in the coil during the 0.30 s that the magnetic field drops ...

**Physics -HELP**

A coil with 337 turns of wire, a total resistance of 47 ?, and a cross-sectional area of 0.35 m2 is positioned with its plane perpendicular to the field of a powerful electromagnet. What average current is induced in the coil during the 0.30 s that the magnetic field drops ...

**math**

A bakery sells 5800 muffins in 2010. The bakery sells 7420 muffins in 2015. Write a linear model that represents the number y of muffins that the bakery sells x years after 2010

**math**

A bakery sells 5800 muffins in 2010. The bakery sells 7420 muffins in 2015. Write a linear model that represents the number y y of muffins that the bakery sells x x years after 2010

**Math**

no one chairs

**Math**

yep

**Math**

Given that the line x/a + y/b = 1 passes through ( 0 , 3 ) and ( 5 , 1 ), find the value of a and b

**Math**

Solve for x: e^4x-3 = 2e^2x1 ln2x+6) - ln(3x-1) = ln(2) Then, simply the radicals

**Math**

What power output will be provided for an amplifier having a gain of 12dB if the power input is 75W?

**literature**

In The Call of the Wild" which dog is sled-team leader after the death of Spitz?

**precalculus**

Given: r = 4/-2-costheta What type of conic does this represent? ________________________________________ Circle Ellipse Hyperbola Parabola

**Geometry**

15^2 + 15^2 = c^2 450 = c^2 square root 450 = 21.2

**Science Physics**

I don't understand how I would know what would happen if it collided or bounced, etc. How do I solve a question like this? Suppose the total momentum of two masses before collision is 100kg m/s. What is the total momentum of the two masses after they collide? 0 kg m/s 50 k...

**Physics**

(a) If the wavelength of an electron is 5.37 ? 10?7 m, how fast is it moving? (b) If the electron has a speed equal to 3.80 ? 106 m/s, what is its wavelength? What equation should I use?

**Chemistry Lab**

So I have a lab exam tomorrow and our instructor said that one of the questions would be as follows: Prepare 100mL of 0.03 M Copper Sulfate, beginning from copper sulfate pentahydrate. Calculate the exact molarity to 3 sig figs. Alright so I understand how to prepare 100mL of ...

**chemistry**

P4 + 6 Br2 -> 4PBr3 In a particular reaction, 20 grams of phosphorus P4, is combined with 50mL liquid bromine ( Density= 2.93 g/ml) 1) Calculate the mass of product in grams for each of the reactants 2) Limiting reagant and Mass Maximum mass of PBr3 so for 1) I converted ...

**math**

How many square feet of carpet will be needed to cover the kitchen and bedroom floors? 237.5 square feet 365 square feet 425 square feet 475 square feet

**Social Studies**

Why were Middle Colones more favorable to farmers than New England? Thanks in advance for any responses!

**Chemistry**

Net Ionic equation for 1. Iron(II) Iodide and Magnesium Acetate 2. Ammonium Phosphate and Cobalt(III) Chloride 3. Sodium Acetate and Potassium Chloride These are the only ones I have left on my HW and I can't seem to figure them out would appreciate some help.

**Math. please help**

-1/2 + 1/3 = ? Find common denominator,which is 6. (3/3)*(-1/2)+(1/3)*(2/2)= -3/6 + 2/6 = -1/6 Note: to keep fraction equal, you must multiply them by another fraction equal to one. Both 3/3 and 2/2 equals one.

**College Physics**

A 1300-kg car moving on a horizontal surface has speed v=65 km/h when it strikes a horizontal coield spring and is brought to rest in a distance of 3.0m

**english**

Culture is a big part as well environment hope it helps

**Reading/English**

Reread "The Night the Bed Fell" and "The Stolen Day." In a paragraph or two, compare and contrast the stories. Please help me.

**Accounting**

On September 1, 2011, Fast Track, Inc. was started with $30,000 invested by the owners as contributed capital. On September 30, 2011, the accounting records contained the following amounts: Accounts Payable $2,200 Dividends Declared and paid $2,300 Accounts Receivable $2,200 ...

**Physics**

A pilot wants to ﬂy from city A to city B, a distance of 394 km at an angle of 10.0 degrees west of north. The pilot heads directly toward city B, with an air speed of 203 km/h. After ﬂying for 1.0 hours, the pilot ﬁnds she is 17.5 km oﬀ course to ...

**Expected Value?**

john failed, thanks for the way to figure it out, used it on my online quiz and was wrong.

**Math**

Answers are D A C B CCA Students 8th

**Math**

the ratio of soccer ball to baseball is 12 to 15.if there is 48 soccer ball how many baseball are there

**physics**

A public transportation bus travels back and forth along a road, following the position-time graph over the time period shown below. There are five points labeled on the graph. What is the average speed and velocity (magnitude and direction) of the bus between point 1 and ...

**English**

What does this sentence mean from the Scarlet Letter? Yet the taste of the age, demanding whatever was elaborate in compositions of this kind, did not fail to extend its influence over our stern progenitors, who had cast behind them so many fashions which it might seem harder ...

**Sociology**

I did. Starting to believe it's Inequality. My text said that Marx believes that social stratification comes from unequal property relations or unequal access to the means of production.

**Sociology**

Marxism is a theory of history and social change that expresses which of the following as its central concern? A) Violence B) Feudalism C) Inequality D) Mass consumerism I'm thinking B but I'm not really sure.

**Physics Ap**

A flower pot falls from a windsill 30 meters above the sidewalk. How fast is it going when it hits the ground? How long does it take to reach the ground? How fast would it be going if it was thrown down at 8m/s instead?

**Physics**

A boat that can travel at 3.0 km/h in still water crosses a river with a current of 1.7 km/h. At what angle must the boat be pointed upstream to travel straight across the river?

**American Government**

Ms. Sue you fagg, if you're going to help other kids with something like this at least don't give them false answers

**Calculus AB**

If a sinusoidal function has a local maximum at (3,8) and the next local minimum at (7,-2), 1) What is the equation of a cosine function that has a graph characterized in the statement above 2) What is the equation of a sine function that has a graph characterized in the ...

**Vectors**

Show that the line with parametric equations x = 6 + 8t, y = −5 + t, z = 2 + 3t does not intersect the plane with equation 2x − y − 5z − 2 = 0.

**math**

True or False: The median must always be one of the numbers in the data set itself.

**chem chem**

hi does anyone know what the VSPER theory is

**algebra**

An amusement park charges $6 to enter, and $3 per game. If you paid a total of $18, how many games did you play?

**Chemistry**

How many moles are in 7.5x10^24 molecules of carbon dioxide? Grams?

**Geometry**

Oh lol thx :)