# Posts by al

Total # Posts: 405

**Math**

Lee walks along the edges of a rectangular pool from point A to B to C to D, a distance of 38 metres. Marina walks along the edges of the same pool from B to C to D to A, a distance of 31 metres. What is the perimeter of the pool, in metres?

**Physics**

An airplane traveling at 200 mph in a direction of 40 degrees north of east encounters a wind blowing east at 50.0 mph. Find the velocity of the plane measured from the ground.

**physics**

Machines A, B, and C do the same amount of work, but they each take a different amount of time. Machine A takes more time as compared to machine C. Machine B takes the maximum time to do the same amount of work. Which machine expends the most power doing this work?

**Physics**

Water flows from a fire truck through a hose that is 11.7 cm in diameter and has a nozzle that is 2.0 cm in diameter. The firemen stand on a hill 5.0 m above the level of the truck. When the water leaves the nozzle, it has a speed of 20.0 m/s. 1) Determine the minimum gauge ...

**Math fractions**

1/3.

**Math fractions**

Jackie loves to cook fried foods. She recorded the total amount of oil that she used each month in the table below. In January she used 3/5 of the amount of oil that she used in Fedruary. Fill in the amount of oil that Jackie used in January in the table below. Month. Gallons ...

**physics**

dude

**college chemistry**

How many grams of NaCN are needed to react with 50.0 g of MgCl2?

**Statistics**

A VP of manufacturing claims that more than 3% of items produced using a certain assembly line are defective. A random sample of 400 items is selected. At the 10% level of significance, which of the following would be part of the standardized decision rule? - Conclude H0 if TS...

**Physics**

UOIT Student cheating, you will be filed and reported.

**Physics**

You are walking a dog when the dog sees a cat and runs away from you. You immediately run after the dog at 5.50 m/s. You jump at an angle of 29.0° to try and catch the dog. While you are in the air the dog is able to move an extra 1.34 m away from you. If you are able to ...

**Math**

how did you get x without writing the equation? lol anyway 90=2x+23+x+13 90=3x+36 54=3x 18=x

**Chemistry**

Balanced equation C5H12 + 8O2 --> 5CO2 + 6H2O

**us history**

You have OREGON FEVER! On your voyage west, there are many things you must plan for if you plan to make it to your final destination. Choose one of the following to complete and submit to Mrs. Sterling through webmail for extra credit. • You are concerned about weather. ...

**algebra**

help please

**algebra**

The equation f(x) = 4x2 − 16x + 9 represents a parabola. What is the vertex of the parabola? (2, −7) ( −2, 57) (4, 9) ( −4, −137)

**earth science**

The following questions are based on the “Mt. Dome, California,” quadrangle (Figure 33-2 found on page 228 of the Laboratory Manual; enlarged to scale 1:48,000; contour interval 40 feet) and the stereogram of the same

**laney college**

The following questions are based on the “Mt. Dome, California,” quadrangle (Figure 33-2 found on page 228 of the Laboratory Manual; enlarged to scale 1:48,000; contour interval 40 feet) and the stereogram of the same

**English assignment**

I know. But what do I exactly write in the thesis. judgement based on color, whites feel like they are above other races, racial discrimination. How do I make these things into one solid thesis statement.

**English assignment**

I need to make a thesis statement about racism based on my two books. The two books that I chose to do was: secret life of bees and black like me. I am having trouble making a thesis. I'll give you all the information about the racism in these two books. One book talks ...

**math**

3/4

**Physics**

7,7

**Chemistry**

when potassium in water are combined they produced 4000.0 kJ of heat along with potassium hydroxide and hydrogen gas. how much energy would be produced if you dumped a 1.00 kg chunk of potassium into a swimming pool? s this reaction what is the enthalpy change?

**Chemistry**

When methane is combusted with excess oxygen 891 kJ of energy is produced start with 100g of methane. how much energy is produced? is this reaction endothermic or exothermic? Also provide enthalpy change for this reaction: CH4 + 2O2 (arrow)= CO2 + H2O + 891 kJ

**Chemistry**

2Fe2O3 + 6C + 3O2 -> 4Fe + 6Co2 What mass of Fe2O3 present is needed to produce 15 of iron? what mass of CO2 is released when 15g of iron is produced?

**Chemistry**

List Sn , Sn2+, Sn4+ in order of decreasing ionization energy

**Chemistry**

Element X has the highest first electron affinity in its period; the ground state electron configuration of it's most common ion is [Kr] 5s^2 4d^10 5p^6 a Element Y is the second largest element in it's period; it's valence electrons are in orbital(s) that have n=6...

**prealgebra**

translate; the quotient of 41 and the product of a number and 35

**physics**

PLEASE HELP! When Babe Ruth hit a homer over the 10 m -high right-field fence 80 m from home plate, roughly what was the minimum speed of the ball when it left the bat? Assume the ball was hit 1.2 m above the ground and its path initially made a 39 ∘ angle with the ground.

**phyics**

When Babe Ruth hit a homer over the 10 m -high right-field fence 80 m from home plate, roughly what was the minimum speed of the ball when it left the bat? Assume the ball was hit 1.2 m above the ground and its path initially made a 39 ∘ angle with the ground.

**physics**

When Babe Ruth hit a homer over the 10 m -high right-field fence 80 m from home plate, roughly what was the minimum speed of the ball when it left the bat? Assume the ball was hit 1.2 m above the ground and its path initially made a 39 ∘ angle with the ground.

**physics**

An airplane is heading due south at a speed of 734 km/h . A wind begins blowing from the southwest at a speed of 110 km/h (average). In what direction should the pilot aim the plane so that it will fly due south?

**Physics**

I really need help with this question, i've found that a texbook said fourth hand, but I don't know if that's a thing Which rule is used to find the direction of force produced by electromagnetic induction? a. First right-hand rule b. Second right-hand rule c. ...

**Physics**

I also got for 2. D

**Physics**

I got some of the answers I think 7. False 6. True 5. False 1. D 3. D Are these correct?

**Physics**

I need some help with a few multiple choice quadroons that I don't understand 1.EMF is best described as a(n) a. electric force. b. energy measure. c. charge flow rate. d. potential difference. 2. Which rule is used to find the direction of force produced by ...

**Math**

The parking lot has 5/6 as many vans as trucks. What equation can be use to show the number of vans?

**Probability**

1. 4 2. 4 3. 6 4. 4

**probability**

5. 2/5

**probability**

1. 0.44 2. 1/9 2/9 6/9 3. 1/9

**probability**

1. 0.44 2. 1/9 2/9 6/9 3. 1/9

**geometry**

the following system of equations bounds a region. If the region is rotated about the line x=0, what is the shape of the resulting solid figure? y=-2x+4 X=0 Y=0 Y=2

**physics**

We have to do a lab in physics where we research and write on real life applications of momentum, the guidelines we have are Research Assignment: Application of Momentum in Real-Life Situations Task: Choose any real-life situation where the concept of momentum is involved and ...

**Chemistry**

I have to do a lab on equilibrium, where you have to transfer water with two different sized straws, and answer questions based on that the questions are about the significance of where there is a flat line on the graph, and the significance of the point where the two lines ...

**Chemistry**

I need definitions for chemistry and I can't come up with any heterogeneous reaction homogeneous reaction activation energy activation energy activated complex elementary reaction

**math**

Aaron earns $1.50 for every video game he sells. When he sells one carton of 30 video games, he earns an additional $10. What is the minimum number of video games he has to sell in order to earn $450?

**geometry**

find the area bounded by a regular pentagon with radius 6 cm. round to the nearest tenth.

**Math**

Davida bought a pair of earrings, each in the shape of an isosceles triangle with equal side lengths of 24 mm and a base length of 16 mm. She used one earring to make another pair of earrings, similar in shape, with the base length equal to 11 mm. What is the length of the ...

**Geometry**

The circumference of a circle is 20 pi cm. Find diameter, radius, and area of the disk, the length of an arc of 90 angle and area of a 90 angle sector. Answer in terms of pi. d= ___ r= _____, disk area= _______ arc length =______, sector area =________

**math**

At 8 A.M., Dylan and his neighbor, Mickey, drove in their cars to a city that was 240 mi. away from their neighborhood. When Dylan reached the city, Mickey had 40 mi. to go. He finally completed the trip 48 minutes later. a) How long did it take Mickey to drive to the city? b...

**Chemistry**

what is the trend in the atomic radii as the atomic number increases across a period? What is the exception to this trend? I know the radius decreases as you go from left to right, but I can't figure the exception, I read somewhere that it's the noble gasses but I'...

**Chemistry**

what is the trend in the atomic radii as the atomic number increases across a period? What is the exception to this trend? I know the radius decreases as you go from left to right, but I can't figure the exception, I read somewhere that it's the noble gasses but I'...

**Chemistry**

what is the trend in the atomic radii as the atomic number increases across a period? What is the exception to this trend? I know the radius decreases as you go from left to right, but I can't figure the exception, I read somewhere that it's the noble gasses but I'...

**Chemistry**

what is the trend in the atomic radii as the atomic number increases across a period? What is the exception to this trend? I know the radius decreases as you go from left to right, but I can't figure the exception, I read somewhere that it's the noble gasses but I'...

**math**

thank you

**math**

A basket contained 75 brown eggs and some white eggs. Salima found that 15% of the total number of eggs were rotten. Of the rotten eggs,2/3 were white and the remaining 6 were brown. a) How many white eggs were there altogether? b) How many eggs were not rotten?

**Chem**

What pairs of ions produce similar colours in the flame test? Use your periodic table of elements to explain the reason for this. I think it's the different groups of elements, but I'm not sure.

**physics**

What angle might give you the greatest height? How could you test this with a simulation that does not go off the page? What angle might give you the greatest distance? How could you test this with a simulation that does not go off the page? What angle will give you minimum ...

**geometry**

Isosceles trapezoid JKLM has legs Jk and LM and bases KL and JM. Jk=8X+5 KL=4X+1 LM=10x+4 and MJ=18X+3, area of JKLM?

**Geometry**

find the area of a triangle whose vertices have coordinates:(5,5)(3,4)(8,3)

**HSM/230**

Post a 200- to 300-word response to the questions found at the end of the case study.

**Math**

Kelly was helping a friend with cleaning her bedroom. Kelly spent two hours and cleaned 80% of the room. what fraction of the room did Kelly help clean? How would I solve this - divide?

**MATH**

a rodeo performer spins a lasso in a circle perpendicular to the ground. the circle has a diameter of 118cm. she starts with the knot at the lowest point which is at 90 cm above the ground, she spins the lasso and .5 seconds later the knot is at the highest point. 1.what is ...

**Language Arts**

I don't know what it is than

**Language Arts**

Is it c

**Language Arts**

yes

**Language Arts**

I think its c please answer ASAP.

**Language Arts**

4. What is the significance of the speech James Otis delivered at the last meeting of the Observers? (1 point) a)Many of the Observers considered Otis to be insane by that time. b)Otis delivered an inspirational speech about the costs of war and the reasons for fighting. c)...

**CHEMISTRY**

Identify the conjugate base in the following reaction. H2O (l) + HCO31- (aq) ¨ H3O+ (aq) + CO32- (aq)? Identify the Bronsted-Lowry acid in the following reaction. H2O (l) + HCO31- (aq) ¨ H3O+ (aq) + CO32- (aq)

**chemistry**

so its 7m?

**probability**

The lifetimes of batteries are independent exponential random variables, each having parameter λ. A flashlight needs 4 batteries to work. If one has a flashlight and a stockpile of n batteries, what is the expected time that the flashlight can operate?

**Math**

Sally has 3 planting boxes . Each box is 4 feet wide and 8 feet long. How much space does she have altogether? Is it 3x4 + 3x8= 36 total feet?

**math**

LEGO R bricks are very common toys and have a structure that allows them to be placed on a rectangular grid. This makes them great for interesting questions about math. A 24 brick has two rows and four columns, making it have 8 total studs. But a 24 is the same as a 4...

**Physics**

Repairing a spaceship CJ drops a hammer and it took .68 s to fall .90 m to the ground. What is the magnitude of the gravitational accerleration on mars

**chemistry**

gas and water

**Calculus - PLEASE HELP!**

Find al points where tangent lines to: (x^2+y^2)^(3/2) = sqrt(x^2+y^2) + x is either horizontal or vertical using implicit differentiation.

**Calculus**

Find al points where tangent lines to: (x^2+y^2)^(3/2) = sqrt(x^2+y^2) + x is either horizontal or vertical.

**Calculus**

Find al points where tangent lines to: (x^2+y^2)^(3/2) = sqrt(x^2+y^2) + x is either horizontal or vertical.

**Calculus**

All right! Thank you :)

**Calculus**

a hyperbola passing through (8,6) consists of all points whose distance from the origin is a constant more than its distance from the point (5,2). find the slope of the tangent line to the hyperbola at (8,6).

**Calculus**

The graph of the equation x2 − xy + y2 = 9 is an ellipse. Find the lines tangent to this curve at the two points where it intersects the x-axis. Show that these lines are parallel.

**math**

A hotel has rooms numbered 1 to 1000. One thousand visitors enter the hotel. 1. The first visitor switches on the light switches of every room. 2. The second visitor switches off the light switches of every other room, starting with room 2. 3. The third visitor toggles the ...

**math**

yes,disregard the disclaimer....

**math**

Downtown Mathville is laid out as a square grid of 9 North-South streets and 9 East-West streets (See diagram). Your apartment is located at the Southwest corner of downtown Mathville. (See point T.) Your math classroom is located in a building that is 6 blocks East and five ...

**Math**

A number and its absolute value are equal. If you subtract 2 from the number, the new number and its absolute value are not equal. What do you know about this number? What is a possible number that satisfies these conditions?

**math**

Consider an equilateral triangle with points located at each vertex and at each midpoint of a side. (See picture.) This problem uses the set of numbers {1, 2, 3, 4, 5, 6}. Place one number at each point. Call the sum of the three numbers along any one side (two vertices and ...

**art history**

d.

**Science**

-Describe the zero sum rule -True of False: The formula for the nitride ion is N^(-3) -True of False: The stock system shows the charge on the negative ion Answer this Question

**math**

1. Finding the Counterfeit Coin. You have 5 coins. You know that one of them is counterfeit and weighs less than the others. Suppose also that you have a balance scale. Is there a strategy for finding the counterfeit coin using the balance scale only twice? If yes, what is the...

**chemistry**

A mixture of 3.00 g of silver and copper metals was dissolved in excess nitric acid. Resulting salts, silver(I) nitrate and copper(II) nitrate, were isolated and dissolved in enough water to make 0.100 L of a solution with a total concentration of the nitrate ion equal to 0....

**math**

Ruth buys 20 pencils for $20. some cost $4,some $0.25 and some $.50 each. at least one of each. How many of each price?

**physics**

7.4 waves crash onto a beach every 58.3 s. What is their frequency?

**Chemistry**

A protein subunit from an enzyme is part of a research study and needs to be characterized. A total of 0.135g of this subunit was dissolved in enough water to produce 2.00 mL of solution. At 28 ∘C the osmotic pressure produced by the solution was 0.138 atm. What is the ...

**Math**

√(5y+1)-√(3y-5)=2, I need to solve algebraically, and state any restrictions on the values for the variables, which I can't remember how to do

**MAth**

4+sqrt(4+x^2)=x, I need to isolate the x variable in the radical equation, but I can't figure out how to do it. The answer is x=3/2

**English**

Then it would be something along the lines of because 20% of teenagers and youth suffer from mental illnesses, parents should be aware of how to recognise problems in their children so they can receive proper care.

**English**

Because I don't know what a thesis statement is and I've never written one.

**English**

I've written the paper and edited it already.

**English**

Its less of an essay and more of an article type thing

**English**

Im writing an essay in English about mental illnesses in teenagers and youth and i can't think of An appropriate title for it. I need some ideas of how to make on or some suggestions.