Monday

February 8, 2016
Total # Posts: 268

**Physics 6A**

shortcut: \hat
*September 21, 2011*

**Physics**

In recent years, a number of nearby stars have been found to possess planets. Suppose, the orbital radius of such a planet is found to be 3.0 1011 m, with a period of 1000 days. Find the mass of the star.
*September 20, 2011*

**math**

I can't figure this out this problem.. estimate 20% of 131 by using 10%
*May 30, 2011*

**Calculus 12 Optimization**

120
*May 19, 2011*

**calculus**

Find f^-1(13), f(x)= 2x^5 + 3x^3 + 8x and find D(f^-1(x)) at x=13. Is this correct... I got 1/27 ??
*March 22, 2011*

**Chemistry**

What is the pH of a solution that is comprised of 0.0843 M HCl and 0.0287 M HClO4?
*March 7, 2011*

**Chemistry**

aqueous sulfurous acid H2SO3 was made by dissolving 0.200 L of sulfur dioxide gas at 19 C and 745 mm Hg in water to yield 500.0 ml of solution. the acid solution required 12.9 ml of sodium hydroxide solution to reach the titration end point. what was the molarity of the sodium...
*February 20, 2011*

**Chemistry**

What is the volume of Tin(Sn)? Mass of sample = 2.588g Initial vol. of water = 31 m/L Final vol. of water = 32 m/L
*February 10, 2011*

**physics**

A damped mass-spring system oscillates at 190 Hz. The time constant of the system is 2.0 s. At t = 0, the amplitude of oscillation is 6.5 cm and the energy of the oscillating system is then 65 J. (a) What is the amplitude of oscillation at t = 2.0 s? What is the amplitude at t...
*January 31, 2011*

**physics**

The 2 kg block in Figure 7-25 slides down a frictionless curved ramp, starting from rest at a height of h = 3 m. The block then slides d = 12 m on a rough horizontal surface before coming to rest. Figure 7-25 (a) What is the speed of the block at the bottom of the ramp? (b) ...
*January 30, 2011*

**Math**

Determine whether the function is periodic. State the period, the domain and the range of g(x)= 2 cos 2x+3 sin 5x
*January 26, 2011*

**math**

a boring job
*January 24, 2011*

**Physics**

A person of mass 55 kg stands at the center of a rotating merry-go-round platform of radius 3.4 m and moment of inertia 670 kg·m2. The platform rotates without friction with angular velocity 1.0 rad/s. The person walks radially to the edge of the platform. (a) Calculate...
*January 23, 2011*

**Physics**

If I have an originaloscilation frequency of .64 and amplitued of 15 What would doubling the mass of the object do to the freqency and amplitude?
*January 22, 2011*

**Math**

If you are given a problem that has measurements in yards and asks you to find surface area, what would the units be in your answer?
*January 19, 2011*

**social studies**

6. Stabilization policies can best be described as policies that: A. attempt to eliminate recession and/or inflation in the economy. B. use changes in government spending to promote an equitable income distribution. C. use changes in the money supply to lower income tax ...
*January 17, 2011*

**physics 11**

if you have the formula W=Fd, where W=work, F=force, and d=displacement, how do you find W if you don't have F, but you have a mass and displacement?
*January 11, 2011*

**physics 11**

brutus, a champion weightlifter, raises 240 kg a distance of 2.35 m. How much work is done by Brutus lifting the weights?
*January 11, 2011*

**Organic Chemistry**

A student wanted to synthesize the anesthetic 2-ethoxy-2-methylpropane. She used ethoxide ion and 2-chloro-2-methylpropane for the synthesis and ended up with little of the desired product. Why? What major product did she obtain? What reagents should she have used?
*November 21, 2010*

**AP Physics**

there are two vectors in quadrant three one with a magnitude of 31.0N and has a direction of 117degrees in the negative direction from the x axis the other has an unknown magnitude and unkown theta in the positive direction starting from 90 degrees Find the scalar product of ...
*November 21, 2010*

**AP Physics**

there are two vectors in quadrant three one with a magnitude of 31.0N and has a direction of 117degrees in the negative direction from the x axis the other has an unknown magnitude and unkown theta in the positive direction starting from 90 degrees
*November 21, 2010*

**AP Physics**

Find the scalar product of the vectors in Figure P7.8, where è = 117° and F = 31.0 N. y | | ___| Unk Angle----> / | -------\--------------x starts@O-----> / /| / / /_|/<-----117 degrees / / | / / <-----31.0N
*November 21, 2010*

**AP Physics**

A basketball player makes a jump shot. The 0.700-kg ball is released at a height of 2.00 m above the floor with a speed of 7.70 m/s. The ball goes through the net 3.00 m above the floor at a speed of 3.10 m/s. What is the work done on the ball by air resistance, a ...
*November 21, 2010*

**6 grade algebra**

cindy earns 6% simple interest each year on her savings account. if she has $850 in her account and leaves the money in there for 5 years. how much interest will the money earn? what is the new balance in cind's account?
*November 12, 2010*

**Chemsitry**

Calculate the weight of KHP that will react with 25mL of .1M NaOH
*October 19, 2010*

**math**

x/5-1=3
*September 22, 2010*

**Chemistry**

(1.48 cg) + (0.347 g) . Answer in units of g
*April 1, 2010*

**college**

Solve the inequality using a sign graph (test point method) x^3-x^2-4x+4<0
*March 17, 2010*

**diagramming a sentence**

In this sentence, "Yellowstone National Park is in Wyoming", is the word "in" the present tense verb?
*January 14, 2010*

**science**

if we didnt have chemical energy what would change in our everyday life?
*January 14, 2010*

**Math **

what is 12 to the 2nd power?
*December 6, 2009*

**Math**

How long will it take to earn $252 in interest if $1200 is invested at a 7% annual interest rate??
*November 19, 2009*

**math**

find the missing numbers 1562 ----- ----- ---- ------ ----- 1874. they are number lines
*September 28, 2009*

**math**

find the numbers 2493 ----- ------ ----- ----- 8008
*September 28, 2009*

**Chemistry II**

109.4
*September 16, 2009*

**math**

what is the difference between doubles plus one and counting on?
*August 27, 2009*

**algebra 1**

how do i solve polynominal expressions
*June 10, 2009*

**trig--power reducing formulas**

(cosx)+(cosx)(cosx)
*April 20, 2009*

**Social Studies**

Information about Ponhatons
*April 1, 2009*

**Bible study**

Hi, im doing a bible study and it tells mr to unscramble some names. Here are the questions... Towhat for men was Jesus taken to after he was arrested? It was _ _ _ _ _ (NNASA), the father in law of the second man. The second man is _ _ _ _ _ _ _ _ (AIPACHAS), Jesus spent the ...
*March 15, 2009*

**math**

x-8y=18 -16x+16y=-8
*March 6, 2009*

**Civics**

Who is assigned to take care of diplomacy?
*February 21, 2009*

**physics**

A vibrator moves one end of a rope up and down to generate a wave. The tension in the rope is 58 N. The frequency is then doubled. To what value must the tension be adjusted, so the new wave has the same wavelength as the old one? would it be doubled?
*January 26, 2009*

**Physics**

a 100 g iron bar at 100 C is placed in 200 g of water at 20 C. If specific heat of iron is 0.11 cal/G*c to what final temperature will the iron bar cool?
*January 11, 2009*

**Physics**

a 100 g iron bar at 100 C is placed in 200 g of water at 20 C. If specific heat of iron is 0.11 cal/G*c to what final temperature will the iron bar cool?
*January 11, 2009*

**SKILLS FOR THE EFFECTIVE TEACHER AIDE**

ok for one they do send you your books. because i am doing the same exact thing right now!!
*January 9, 2009*

**5th grade math**

Need help... equivalent decimal for 214% =.214right? percentage 7 1/2% of 120 = 9% percent 15 is what percent of 75 = ?
*December 5, 2008*

**algebra**

Ok this is just dumb no answers any where
*October 26, 2008*

**english**

What dose 1/2 a page mean? Dose it mean 15 lines?
*September 8, 2008*

**Math**

What are dot arrays? What would a dot array for $1.84 look like? Thanks!
*August 26, 2008*

**Math**

Using a graph, what is the relationship between volume and height?
*May 29, 2008*

**Science**

The question I have is based on air having a density of 0.0013(g/mL). What is the mass of 550mL of air? How do I use the formula Density = mass/volume to solve this problem?
*March 22, 2008*

**social studdies**

Hii social studdies is kind of hard!And yes i do do 8th grade social stuudes
*January 29, 2008*

**Math**

i have a homework problem:
*November 15, 2007*

**math**

need to know metric system in alphabetical order
*September 11, 2007*

**Trigonometry**

Need help solving problems using the Trigonometric Identities: 8cos^4 thet=cos4theta+4cos2theta+3 I am a bit unsure how to solve it. I am aware that the first step I must take is to simplify the problem and then use the Product to Sum formula Nasty one! let's start on the ...
*April 23, 2007*

**New York**

For a report I have to choose a state and a town and write about it I chose Franklinevill NY. Please help me find some websites or maybe find a better state and town to do my report on. Thank you I googled Franklinville NY and found this home page for the town. Click the links...
*April 1, 2007*

**math**

why dosnt the commutitive property work with subtraction and division? For subtraction : Because a - b and b - a are not the same. They are of opposite sign. For division: a/b does not equal b/a. If it did, you would have a^2 = b^2 for ANY a and b, which is impossible
*March 5, 2007*

**spelling**

grass:lawn::toss:throw
*January 16, 2007*

**Curriculum Development**

I have a couple of questions on an assignment, that I need help with. 1. Rebecca is painting on an easel. She paints a blue sun with green clouds all around it. She is able to express what kind of creative potential? 1.maximum 2.moderate 3.minimum 4.no 2. Steven is making ...
*January 1, 2007*

**Curriculum Development**

I have a question that I need help in answering. Miss Sanchez lives in Washington,D.C. She was planning fied trips for her pre-school class. Which one of the following field trips would NOT be an appropriate choice for her students? A. Going to the National Mall to see the ...
*December 31, 2006*

**Cirriculum Development**

When Amy's grandmother did die it would be appropriate for her mother to: A. say,"Grandma was very sick but now she's gone. We aren't going to cry about it anymore." B. say,"I know you are sad. So am I. We will miss Grandma,but I am glad she isn'...
*December 30, 2006*

**Curriculum Development Question**

I have this question on a homework assignment. Which of the following menus is best for preschoolers as outlined by the Food Guide Pyramid for children. 1.Breakfast-fruit juice,a bowl of cereal,and a piece of toast Morning snack-fruit juice and crackers Lunch-fruit juice,a ...
*December 28, 2006*

**word unscramble**

cmeriisot
*September 28, 2006*

**Math Vocabulary**

I wish i could help u but i have the same prob. sorry
*September 7, 2006*

**reading**

does anyone have the list of words to look up for tonight from ms.dudley Call one of your classmates quickly.
*August 24, 2006*

**math**

What do you call the numbers that cannot be arranged into 2-row arrays? I DUNNO
*August 24, 2006*

**making dot arrays**

I dont know
*August 21, 2006*