# Posts by Jamie

Total # Posts: 1,069

**Physics**

A uniform beam of length L = 7.80 m and weight 4.05 102 N is carried by two workers, Sam and Joe, as shown in the figure below. Determine the force that each person exerts on the beam. (Sam is 1m from one end of beam and joe is 2m from the opposite end.)

**CHEM**

how many moles of oxygen are present in 11.0 molecules of NaClO4? AND HOW DO I WORK IT OUT

**math**

3/4-1/2n=4/5 Please don't give me the answer, just show me the steps to solve it

**math**

-6=4x/7+2

**algebra**

perform the subtraction (8a+2b)/(8a^(2)+2ab-3b^(2))-(a+2b)/(16a^(2)-ab^(2))

**Physics**

A 39.2-kg boy, riding a 2.39-kg skateboard at a velocity of +4.97 m/s across a level sidewalk, jumps forward to leap over a wall. Just after leaving contact with the board, the boy's velocity relative to the sidewalk is 6.48 m/s, 9.54° above the horizontal. Ignore any ...

**health**

how do you lose weight

**math**

Yes, painting can be 12 to 14 inches . Lengths do not matter . Thank you

**math**

Want to hang a painting on a wall that is 17and 5/8 inches high and I want 2 inches left on top and bottom of painting showing. Where would I hang it at?

**Chemistry**

Say you have a question asking to rank the oxidizing strength of several different metals. When you look at the reduction table to determine the strength, there are metals with different oxidation states. For example: Fe3+ + 3e- => Fe ; Eo = -.04 Fe2+ + 2e- => Fe ; Eo...

**Math**

A squirrel is moving at a speed of 15 feet per second. At this rate, how long will it take the squirrel to travel one mile? Convert answer into minutes, to the nearest tenth.

**algebra**

A satellite dish has a parabolic cross section and is 6 ft deep. The focus is 4 ft from the vertex. Find the width of the satellite dish at the opening. Round your answer to the nearest foot. Thank you

**Math**

He was not late to the bus stop because 8:15 is just the digital way to say quarter after 8

**Statistics**

A high school counselor is interested in the percentage of students who will be going to college. She randomly picks 60 students and finds that 53 will be going to college. Use a 95% confidence level to find the population proportion. a) State the 95% confidence interval for ...

**Statistics**

A purchasing agent at the Kelly Bread Company wants to estimate the mean daily usage of rye flour. She takes a sample for 50 straight days and finds that the sample mean is 180 pounds with a sample standard deviation of 38.5 pounds. a) State the 90% confidence interval for the...

**Chemistry**

I followed your direction and I calculated the solubility to be 40. Am I correct?

**Chemistry**

Consider the following reaction that describes the solubility equilibria of solid Zn(OH)2 in aqueous solution (Ksp of Zn(OH)2 4.0x10^-17. Calculate molar solubility of Zn(OH)s in an acidic solution of pH5.0.

**chemistry**

To maintain the effectiveness of a buffer, relative concentrations of the acid and the conjugate base should not differ by a factor of 10. Based on this information, derive pH range within which the buffer can work effectively. I know that I have to use the HH equation, but I ...

**chemistry**

To maintain the effectiveness of a buffer, relative concentrations of the acid and the conjugate base should not differ by a factor of 10. Based on this information, derive pH range within which the buffer can work effectively. I know that I have to use the HH equation, but I ...

**chemistry**

To maintain the effectiveness of a buffer, relative concentrations of the acid and the conjugate base should not differ by a factor of 10. Based on this information, derive pH range within which the buffer can work effectively. I know that I have to use the HH equation, but I ...

**Chemistry**

Consider the following reaction that describes the solubility equilibria of solid Zn(OH)2 in aqueous solution (Ksp of Zn(OH)2 4.0x10^-17. Calculate molar solubility of Zn(OH)s in an acidic solution of pH5.0.

**Physics, diffraction, interference, help!**

3.Blue light (λ = 450 nm) shines on a diffraction grating that has 4000 lines/inch. A.Calculate the angle of the fourth-order image

**Physics, diffraction**

1. Yellow light of wavelength 580 nm shines on a diffraction grating with 4000 lines/cm. A.At what angles do the first-order and second-order maxima occur?

**physics**

Three different forces produce the same displacement: the vector Delta(r) starts at the left edge of your computer monitor and the tip points to the right edge of your monitor in a horizontal orientation. The first force has a magnitude of 10 N and it is pointing straight up, ...

**Math**

Yes IT IS!!100% correct good job!

**physics**

A 1.03 kg mass is attached to a spring of force constant 10.6 N/cm and placed on a frictionless surface. By how much will the spring stretch if the mass moves along a circular path of radius 0.525 m at a rate of 2.20 revolutions per second?

**physics**

You are in the lab with a 10 V battery. You have a 10 W light bulb and you want to put 1/2 A of current through the light bulb and 5 V across the light bulb. This will allow the light bulb to have a brightness proportional to 2.5 W. Assuming any resistors that you need, design...

**Calculus**

Never mind. I was able to figure it out.

**Calculus**

Find the derivative of f(x) = ln(13e^(5x) + 2)

**Physics**

A wire of cross-sectional area 5.00x10^-6 m^2 has a resistance of 1.75 ohm. what is the resistance of a wire of the same material and length as the first wire, but with a cross-sectional area of 8.75x10^-6 m^2? I really want to understand what to do here, so detailed steps ...

**Algebra**

A trapezoid when its height is h and the lengths of its bases are a and b. What is the area of a trapezoid when h = 6 meters, a = 5 meters, and b = 12 meters? Formula A = 1/2h(a+b) gives the area.

**School For Human Rights**

A student wants to prepare Halite. How much sodium can he use to completely react it with 30g of Chlorine gas?

**physics**

how much work (J) is done by friction when the mass is 150 kg and dragged for 10 m if the coefficient of sliding friction is .3?

**Algebra**

x-2y=.9 4x-3y=13.1 Solve using the substitution method.

**Algebra**

4x+y=42 6x-5y=50 Solve using the substitution method.

**math**

the product of three consecutive integers is 22 less than the cube of the middle integer. Find the integer.

**Geometry**

If you go to Eden a math tuition you will have the diagram for this question but if you do not there will be ... LET ME JUST GET TO THE QUESTION Question: what is the measure of MQ in the diagram shown?

**floral design**

One of your friends who works at a local public TV station knows that you wish to break into event-floral designing. She attended a party last week for which you had created an amazing set piece that surrounded a small dance floor. Impressed with your work, she asks you to ...

**Math**

Oh, never mind! 28 inches high /2 so you can find the area between ceiling and middle of painting.

**Math**

Oh, never mond! 28 inches high /2 so you can find the area between ceiling and middle of painting.

**Math**

Ughh....

**Math**

Hhow'd you get 14 inches though?

**Design**

What is the difference between the vegetative style and the landscape style of flower arranging? A. Vegetative arrangements group same-season flowers together, while landscape arrangements don't. B. The vegetative style features flowers as they're found in nature, ...

**Design**

Which design style encourages a complete manipulation of floral materials into unnatural geometric shapes and colors? A. Abstract B. New convention C. Ikebana D. New wave im thinking B

**Design**

What is the difference between layering and terracing? A. More depth can be achieved with layering than with terracing. B. In layering, the materials are more three-dimensional than in terracing. C. In layering, materials such as leaves can't be reversed to reveal ...

**Design**

_______ refers to the process of tying materials together to hold them in place in an arrangement. A. Binding B. Clustering C. Banding D. Grouping

**Physics**

A car traveling at 20 m/s accelerates at 7 m/s2 for 3 sec. How fast is it now traveling? Please help!

**Trigonometry**

In 2010, the population of a country was 70 million and growing at a rate of 1.9% per year. assuming the percentage growth rate remains constant express the population P, as a function of t, the number of years after 2010.

**Math**

The answer is... Wait, I think I just forgot. Ohh.... Never mind! The answer is: The test scores are 34,56,78,98. So the fourth test score is 98. Hope this helped

**Heat Capacity**

When a 3.25 g sample of solid sodium hydroxide was dissolved in a calorimeter in 100 g of water, the temperature rose from 23.9 C to 32.0 C. Calculate delta H (in kJ/mol) of for the solution process: NaOH (s) -> Na+(aq) + OH-(aq) Use a calorimeter heat capacity of Ccal = 15...

**Math**

-1/(x^3)-27 or -1=A(x^2+3x+9)+Bx+C(x-3) I'm trying to find the partial fraction decomposition. I think A=-1/21, but how do I find the right values to plug in for x to find B and C?

**Physics**

If you throw a ball straight upward at a speed of 24 m/s, how long will it take to reach zero speed? How long will it take to return to its starting point? How fast will it be going when it returns to its starting point?

**Math**

Just glancing at the problem makes me think 31.... idk

**English - writing**

Is this a run-on sentence? Though I do believe we need to be useful, honorable, and compassionate to live a successful life, I would argue that the purpose of life is to be happy, but only through the aforementioned requirements can we achieve happiness, and thus, we may “...

**Physics**

Suppose there is a small hole (radius=0.0203) at the base of a large tank. If the height of water in the tank is 15m (a) what is the speed of water escaping through the hole? (b) Calculate the amount of water (in cubic meters per second) escaping the tank.

**chemistry**

5.49atm

**math**

How would you condense a logarithm expression into a single quantity if the logs have different bases?

**algebra**

What is (-2)^2 (-3)^2

**Math**

Theater has 108 seats, which are arranged in rows. The number of seats in each row is 3 less than the number of rows. How many rows of seats are in the theater.

**algebra**

Y^2-y-6

**Business Calc**

Determine when, to the nearest year, $3,000 invested at 5% per year, compounded daily, will be worth $10,000.

**Math**

Suppose that ln2=r. Use properties of logarithms to write the logarithm in terms of r. ln32=__

**english**

1. What about Thoreau’s night in jail made him angry? (1 point) The fact that his stay in prison was too short to make a point. The interference with his protest. The uncomfortable accommodations. 2. Why do the playwrights refer to their protagonist as “The Now ...

**algebra**

7 nickels to 22 dimes

**health**

it should actuly have been c. I think your original answer was correct

**Math**

How do you simplify this? (x+3/x-6)-2/(x+3/x-6)+8

**math**

4((x/4)+5)-20 How do you solve this for x?

**English.**

2. worse than before he talked to virgil

**chemistry**

How many kilojoules of heat are released when 38.6g of CH4 reacts completely with O2 to form CH3OH at constant pressure?

**Health**

its d

**math**

(X`2-7x+10x`3+1) ÷(2X-1)

**College Physics**

two motorcycles of equal mass collide at a 90 deg. intersection. if the momentum of motorcycle A is 450 kg km/h west and the momentum of motorcycle B is 725 kg km/h south, what is the magnitude of the resulting momentum of the final mass?

**math**

The length of a rectangular area is 3 feet less than twice its width. The perimeter of the rectangle is 132 feet. Find the length and width of the rectangular area

**math**

Faye is making 13 bows to sell at the annual craft fair. She has 36 feet of ribbon to make her bows. If each bow requires 2 1/4 feet of ribbon will not be used

**public finance**

Your annual income is $50,000. You want to take out a mortgage loan to buy a house. The rule on mortgage loan requires that your annual mortgage payment cannot exceed 30% of your annual income. If the current interest rate is 5% for a 30-year mortgage loan, what is the maximum...

**public finance**

If the current interest rate is 5% for a 30-year mortgage loan, what is the maximum amount one can borrow for a house?

**College algebra**

Find the maximum value of: y=-3x^2 -15x +1

**math**

Prime & composite numbers explain

**Chemistry**

Calculate the quantity of cold water assuming that 50mL of cold water weighs 50g.

**health**

Its d

**Psyhology**

Why is it important to consider non-verbal communication from a cultural perspective when performing a patient diagnosis?

**earth science**

What are 10 facts about hurricane Isaac?

**lincoln high**

The mean hours of internet usage by adult in the US is claimed to be 25 hours per week. A hypothesis test is performed at a level of significance of 0.05 with a p-value of 0.08. Choose the best interpretation of the hypothesis test.

**Health**

Its C, as logic should dictate

**statistics**

In a time-use study, 20 randomly selected managers were found to spend a mean of 2.40 hours each day on paperwork. The standard deviation of the the 20 scores is 1.30. Also, the sample data appear to have a bell-shaped distribution. Construct the 95% confidence interval for ...

**psychology**

Dr. Marquette is a researcher who studies the encoding, storage, and retrieval of information throughout life. What approach to cognitive development does she take?

**phsycs**

50.7

**Volume**

Find the volume of the solid generated by revolving the region bounded by the given curves and line about the y-axis. y=50-x^2 y=x^2 x=0

**Finance**

YOU DEPOSIT $5,000 INTO THE FIRST NATIONAL BANK OF FIN 301 AND EARN 2.5% COMPOUNDED CONTINUOUSLY. HOW MUCH WILL YOU HAVE IN 5 YEARS?

**Physics**

The pressure-volume graph shows an engine cycle where the working substance is an ideal monatomic gas (γ = 5/3). The process A-B is adiabatic. At point A, the pressure is 2.70×105 Pa and the volume is 0.0180 m3. At point B, the volume is 0.0450 m3. During a cycle, ...

**Physics**

A block on a spring moves in SHM with amplitude 0.23 m and period 3.8 s. The mass of the block is 2.1 kg. What is the total energy of the system?

**Physics**

Susie is out fishing on a calm, sunny day. She hooks an old tire that is resting on the lake bottom, and hauls it into her boat. In principle, how does the water level of the lake change?

**Physics**

Thanks

**Physics**

The hammer throw is a track-and-field event, popular in Scotland, in which a ball on a rope (the "hammer") is whirled around the thrower in a circle before being released. The goal is the send the ball as a projectile as far down the field as possible. At a track ...

**Physics**

A bouncing ball returns to the same height each time. Is this an example of simple harmonic motion? Explain your answer.

**Physics**

15.0 meters from a sound source that radiates freely in all directions, the intensity is 0.00230 W/m2. What is the rate at which the source is emitting sound energy?

**Physics**

Two waves travel in the same medium at the same speed. One has wavelength 0.0382 m and frequency 9.67×106 Hz. The other has wavelength 0.0486 m. What is the period of the second wave?

**Physics**

A shipwrecked mariner is stranded on a desert island. He seals a plea for rescue in a 1.00 liter bottle, corks it up, and throws it into the sea. If the mass of the bottle, plus the message and the air inside, is 0.454 kg, what percentage of the volume of the bottle is ...

**Physics**

A cylindrical metal can with a radius of 4.25 cm is floating upright in water. A rock is placed in the can, causing it to sink 0.0234 m deeper into the water. What is the weight of the rock?

**Chemistry**

Neon gas produced for use in luminous tubes comes packaged in 1.0-L containers at a pressure of 1.02 atm and a temperature of 24°C. How many moles of Ne do these cylinders hold?