# Posts by justin

Total # Posts: 955

**Thermo Dynamics**

Air loses heat to the surroundings at a rate of Q.= t/6 where out Q. is in Watts and t is time in seconds. For 20 minutes of operation, determine the heat loss from the air in kWhr???

**Math**

Hai take 12 minutes to walk to school. He wants to get there.15 mins early to meet with his lab partner. What time shod he leave his house is school starts at 8:10 am?

**Algabra**

I need help solving this using U- Substitution (x^2-4)^2 + (x^2-4) -6=0

**Finance**

Using Monte Carlo simulation, calculate the price of a 1-year European option to give up 100 ounces of silver in exchange for 1 ounce of gold. The current prices of gold and silver are $380 and $4, respectively; the risk-free interest rate is 10% per annum; the volatility of ...

**Math: Statistics**

My homework has a list of numbers and I'm working with standard deviation. I know the standard deviation as well as the mean and everything, but it says to find "the weight that is 3 standard deviations below the mean." What is the formula for that, and can I do ...

**physic**

b) •It is done by Carbon dating. Carbon is the basic basic building block of life and has an amazing memory. Rays of the Sun which are radioactive enter our atmosphere and collide with Nitrogen atoms to create the radioactive isotope, Carbon-14. •We have both Carbon-...

**math**

At the end of an basketball game daniels couch told him he scored 20% of all of his teams points. If Daniel scored 19 points exactly how many points did his team score?

**trig**

Match each ratio in the first row with an equivalent ratio from the second row if angle A plus angle B = 90 degrees. SinA CosA TanA CscA SecA CotA SinB CosB TanB CscB SecB CotB Does this question even make sense?

**Calculus**

Using L'Hopital's Rule, find the limit: lim x->0+ (as x approaches 0 from the right) of sinx/x^(1/3)

**Fractions-easy 5th grade**

Multiply and divide. 1) -2 4/11(-2) 2) 5 1/7 / 4 1/8

**algebra**

y=-2,8

**math**

50+55=x x=105

**algebra**

fx^3+18fx^2+81fx+12 ____________________ 4

**Math**

Divide and multiply. 1) -2 4/11(-2) 2) 5 1/7 / 4 1/8

**Physics**

A coil is made up of 19 square loops with the sides equal to 5.3 cm. The coil is placed in a uniform 350 mT magnetic field with the axis of the coil parallel to the magnetic field. If the field reverses direction in 0.17 seconds, what is in volts, the average emf induced in ...

**geometry**

Quadrilateral ABCD is a rhombus with diagonals AC and BD. if angle M equals 25 find the measures of angles 2 , 3 , 4 and 5

**physics**

A 3.00 kg block starts from rest at the top of a 30° incline and accelerates uniformly down the incline, moving 1.94 m in 1.70 s. (a) Find the magnitude of the acceleration of the block. (b) Find the coefficient of kinetic friction between the block and the incline. (c) ...

**physics**

A 3.3 kg bucket of water is raised from a well by a rope. If the upward acceleration of the bucket is 4.2 m/s2, find the force exerted by the rope on the bucket of water

**Physics**

A satellite is in a circular orbit around an unknown planet. The satellite has a speed of 1.70 104 m/s, and the radius of the orbit is 5.30 106 m. A second satellite also has a circular orbit around this same planet. The orbit of this second satellite has a radius of 8.70 106 ...

**Trigonometry**

F(X) = 2x^3-5x^2-19x+1 / x^2-9....I need the vertical asymptote, horizontal asymptote and the slant asymptote...please help!

**social studies**

Can you give more detail on websites instead of google

**social studies**

Compare/contrast real Julius Caesar to play by William Shakespeare

**science**

probably because of weight

**math**

a refrigerator is 3 ft wide, 2.5ft deep,and 6ft high. The walls and other parts other refrigerator take up to 20ft. How much cubic feet are left for food?

**math**

10/36

**chemistry/HELP PLLEASE**

KMnO4 + Fe2+ + 8H+ +4e- --> Mn2+ + Fe3+ + K+ + 4H20 Fe2+ should turn into 3+, not remain 2+

**history**

when did king louis(married to queen eleanor) die?

**language arts**

Diagram Either the suspect will come out or the police will go after him.

**math**

Draw 3 squares and 24 below. t=square ttt ttt ttt ttt ttt ttt ttt ttt ttt ttt ttt ttt ttt ttt ttt ttt ttt ttt ttt ttt ttt ttt ttt ttt answer=72

**Intermediate Algebra**

Solve for X (1/8)=(2/3)x-1/2

**language arts**

thanks

**language arts**

Diagram.(I'm not sure how you will give me the answer since you can't put lines on) Stephen almost never reads or watches TV and he does not enjoy outdoor sports.

**Ap calc**

A traffic engineer monitors the rate at which cars enter a freeway onramp during rush hour. From her data, she estimates that between 4:30pm and 5:30pm the rate R(t) at which cars enter is given by: R(t)= 100(1-0.00012t^2) car per min., where t is time in min. since 4:30. a. ...

**Math**

It's a trapeziod where the height is 13.8 in. and there is two lengths 8in. And 18 in. what is the area?

**Math-7**

Write and equation that could be used to find x the number of ounces in g gallons x=

**Physics**

Suppose a straight 1.25 mm diameter copper wire could just "float" horizontally in air because of the force of the Earth's magnetic field B, which is horizontal, perpendicular to the wire, and of magnitude 5.00 multiplied by 10-5 T. What current would the wire ...

**language arts peer edit**

The Lightning Thief book and movie are different and same in many ways. The book of the Lightning Thief is more interesting and detailed for most people who read the book and watched the movie. The movie sometimes has things that the book doesn’t have and sometimes the ...

**Language Arts**

Is my first paragraph of the essay good? Correct some mistakes. The Lightning Thief book and movie are different and same in many ways. The book of the Lightning Thief is more interesting and detailed for most people who read the book and watched the movie. The movie sometimes...

**science**

what are the defers and the offence of the crocodile?

**science**

what is the lifecycle of the crocodile?

**science**

what are the defence and offence of crocodile?

**Pre-Algebra**

solve for m 2/3m - 5 = n

**Math**

sole for the variable s r=2s - 8

**Math plz help**

1/2c - 1/4 < -3/4

**math**

lionel says the digits in his mystery number have a sum of 6. you say this mystery number if you count by 3's or count by 4's. what is lionel's mystery number?

**economics**

The table provides data on the demand for and the supply of eggs in the United States. At a price of _____________ there would be a surplus. Price (per dozen) $0.50 $1.00 $1.50 $2.00 $2.50 Quantity Demanded 90 80 70 60 50 Quantity Supplied 30 50 70 90 100 Answer Question 9 ...

**criminal procedure**

8. A journalist is being compelled to reveal a confidential source of information, but the source would be useful to the government in a criminal investigation, or helpful to a criminal defendant at trial. What constitutional issues are involved? Should the government be able ...

**criminal procedure**

Should members of the news media have greater access than the general public to court proceedings and court records? What about greater access to prisons to interview prisoners? What about greater access to police investigative files?

**Math - D.E.Q.**

The half-life of a radioactive isotope is the amount of time it takes for a quantity of radioactive material to decay to one-half of its original amount. i) The half-life of Carbon 14 (C-14) is 5230 years. Determine the decay-rate parameter for C − 14.

**math**

146

**math**

A praire vole has an average of 9 babies per litter. if it has 17 litter in season about how many babies are produced?

**math**

8,050

**math**

A koala sleeps an average of 22 hours each day about how many hours does a koala sleeps in a year?

**physics/dynamics**

The position of a ball as its kicked upwards is measured as y(t) =−(4.9 t^2 + 20t + 0.50)m, where t is measured in seconds. Find the vertical component of velocity and acceleration of the ball as a function of time. If the ground is located at yg = 0, ﬁnd the time...

**math**

idk

**math**

jim ran the 400-meter dash in 47 seconds. if he ran at a constant rate, about how many meters did he run in a second?

**intro to algebra**

I have a worksheet to do and I have TO SHOW ALL MY WORK: Can you help. If this is the problem 29+n=13 How do I show each step?

**physics**

Thanks

**physics**

20 kg , 30 cm diameter disk is spinning at 300 rpm. How much friction force must be applied to rim to bring the disk to a halt in 3.0s?

**calculus**

The moment of inertia about the pole(origin) of the plane region which is inside the cardiod: r = 1 + cosO and outside the circle r =1. It's mass density is equal to it's distance from the pole..... I need someone who is way smarter than me to help with this one... ...

**Math**

The mass of the solid inside the sphere: x^2+y^2+z^2=1, above the xy plane and below the cone z=SqRT(x^2 + y^2. It's mass density is equal to the square of a distance from the origin, setup in both spherical and cylindrical coordinates. I don't have to evaluate, but i ...

**chemisty**

how many grams of Na are needed to react with H2O to liberate 400mL of H2 gas at STP?

**Math**

Use lagrange multipliers to find the point on the plane x-2y 3z-14=0 that is closet to the origin?(try and minimize the square of the distance of a point (x,y,z) to the origin subject to the constraint that is on the plane) Help me please!

**8th grade math**

.10*(1/2)x+.25x = 9.00 x(.10*(1/2)+.25)= 9.00 x= 9.00 ___(.10*(1/2)+.25) x = 30 Since you times the dimes by 1/2, you take half of x. So Dimes = 15, and Quarters = 30 Check, .10(15)+ .25(30) = 9.00

**Singing**

I am having a total meltdown.... I want to sing, but my voice is too low! HELP!!

**spanish**

You are good. Nothing to add. Good job!

**Chemistry**

What volumes of 0.46 M HNO2 and 0.54 M NaNO2 must be mixed to prepare 1.00 L of a solution buffered at pH = 3.40? a) HNO2 b) NaNO2 answer in L

**Chemistry**

How many moles of NaOH must be added to 1.0 L of 1.4 M HC2H3O2 to produce a solution buffered at each pH? (a) pH = pKa mol (b) pH = 3.07 mol (c) pH = 5.15 mol

**Physics**

a 55 kg skateboarder starts out with a speed of 1.8 m/s. he does +80 J of work on himself by pushing with his feet against the ground. in addition, the friction does -265 J of work on him. in both cases, the forces doing the work are nonconservative. the final speed of the ...

**math**

how do I rewrite using the distributive property 3^2 + (9-3) 3 x (24/8) + 2

**EXP105: Personal Dimensions of Education (ABA1047G**

Identify at least two skills that you that you would like to improve. Provide details on what actions you will do to develop each skill. Who do you consider to be a part of your personal support system? How do they offer support and encouragement to you?

**science**

how much energy is required to raise 5 kg of silver 36 degrees celcius with a specific heat of 234 j/kg degrees celcius

**Geometry**

1. How many sides does a regular polygon have if one exterior angle is 90 degrees? 3 4 5 6 2. The measures of three angles of a quadrilateral are 80, 90, and 103 degrees. Find the measure of the fourth angle. 67 77 87 97 3. The sum of the interior angles of a 7-gon is 900 1,...

**geometry**

1. An exterior angle of a regular polygon measures 30 degrees. What is the measure of an interior angle? 30 60 120 150 2. How many degrees are in each interior angle of a regular pentagon? 50 72 108 120 3. If all of the diagonals are drawn from a vertex of a hexagon, how many...

**math**

draw an rectangle that has an area of 12sq.in and a perimeter that is greater than 25in.?

**Math**

99x9=891 #so easy it really easy

**Fine Art**

Keystone questions? Hit me up. justintime5492 at yaahoo

**chemistry**

How many liters of 0.250 M HCl would be required to react completely with 7.50 grams of magnesium hydroxide?

**college**

If I combined 25.0 grams of aluminum hydroxide with 75.0 mL of 0.500 M HNO3 how many grams of aluminum hydroxide would be formed?

**Chemistry**

1. State specifically how you would make a conclusive test for an iron (III) salt. 2. Which test for iron (II) ions is conclusive. 3. Suppose you have a solution containing both an iron (II) salt and an iron (III) salt. How would you proceed to identify both Fe2+ and Fe3+ in ...

**Chemistry**

1. State specifically how you would make a conclusive test for an iron (III) salt. 2. Which test for iron (II) ions is conclusive. 3. Suppose you have a solution containing both an iron (II) salt and an iron (III) salt. How would you proceed to identify both Fe2+ and Fe3+ in ...

**chemistry**

A 0.20 M sodium chlorobenzoate (NaC7H4ClO2) solution has a pH of 8.65. Calculate the pH of a 0.19 M chlorobenzoic acid (HC7H4ClO2) solution.

**chemistry**

Calculate the pH of 3.9 10-8 M HNO3.

**chemistry**

Calculate the pH of a 5.20 10-3 M solution of H2SO4.

**chemistry**

What mass of KOH is necessary to prepare 799.9 mL of a solution having a pH = 11.68?

**chemistry**

You have 100.7 g of saccharin, a sugar substitute, and you want to prepare a pH = 5.80 solution. What volume of solution can be prepared? For saccharin (HC7H4NSO3), pKa = 11.70 (pKa = −log Ka).

**Precalculus**

1. What quadrant would the terminal side of the angle of t=4pie/3 be? 2. What quadrant would the terminal side of the angle of t=3pie/2

**physics**

A 2 kg mass on a horizontal friction-free air track is accelerated by a string attached to a 115 kg mass hanging vertically from a pulley as shown. Compare the accelerations when the masses are interchanged, that is, for the case where the 115 kg mass dangles over the pulley, ...

**biology**

u sure?

**biology**

Why can maintaining homeostasis be particularly challenging for multicellular organisms?

**HELP**

How did the Indian reeducation movement affect young Native Americans?

**physical science**

In the cabin of a jetliner that travels at 600 km/h, a pillow drops from an overhead rack into your lap below. Since the jetliner is moving so fast, why doesn't the pillow slam into the rear compartment of the plane? What is the horizontal speed of the pillow relative to ...

**Chemistry**

A compound has the empirical formula CHCl. A 256 mL flask, at 373 K and 750. torr, contains 0.800 g of the gaseous compound. Give the molecular formula.

**Chemistry**

Air bags are activated when a severe impact causes a steel ball to compress a spring and electrically ignite a detonator cap. This causes sodium azide (NaN3) to decompose explosively according to the following reaction. 2 NaN3(s) 2 Na(s) + 3 N2(g) What mass of NaN3(s) must be ...

**Physics**

1. A stroboscopic photo of a club hitting a golf ball, such as the photo shown in Figure 6.3, was made by Harold Edgerton in 1933. The ball was initially at rest, and the club was shown to be in contact with the club for about 0.0022 s. Also, the ball was found to end up with ...

**Discrete Math**

7.A group has 9 women and 7 men. d. Suppose 2 members of the group refuse to work together. How many subgroups of 5 can be chosen 8. In how many ways can 16 people be seated: a. In a row, if 4 of the 16 do not want to sit next to one another b. In a row, if 3 of the 16 must be...

**Discrete Math**

7.A group has 9 women and 7 men. d. Suppose 2 members of the group refuse to work together. How many subgroups of 5 can be chosen 8. In how many ways can 16 people be seated: a. In a row, if 4 of the 16 do not want to sit next to one another b. In a row, if 3 of the 16 must be...

**8th grade**

Her brother said he wanted his palm red

**Math**

How do you solve: (-2t)^2(3t^7)^2

**Math**

If the sides of a square are lengthened by 7cm, the area becomes 121cm2. Find the length of a side of the original square.