Saturday
December 20, 2014

Posts by Phillip


Total # Posts: 129

Related rates math in calculus
A square sheet of cardboard has sides 18cm. Four equal portions are cut away from the corner and discard. The sides are then twiced up to form a restangular box. What are the dimension of the box formed that will have max volume?
August 22, 2014

Science
Earth travels around the sun at a spreed of 30,000 meters per second. Express this in kilometers per hour.
May 15, 2014

grammar
Future
March 25, 2014

MATH
Could you please check? j+18 = 2(j-92-18) j=128 Checking 128+18= 2*128-110 146= 36 ???? it does not make sense
January 26, 2014

MATH
Jim had 92 more marbles than Sam. After Sam gave Jim 18 marbles, Jim had twice as many marbles as Sam. How many marbles did Jim have at first?
January 26, 2014

MATHS
Thank you Ms. Sue :)
January 26, 2014

Biology 101
1. Which of the following statements is incorrect about homologous chromosomes? a. Homologous chromosomes are similar but not identical b. Homologous chromosomes have the same size and function c. Homologous chromosomes contain genes for the same kind of protein products d. ...
October 23, 2013

trig identites
since sin2x+√3cos2x=2sin(2x+60) find the general solution for the equation sin2x+√3cosx=0 thank you
May 10, 2013

Math
a group of students ate a whole pie each student ate exactly 1/5 of the pie how many students shared the pie
April 15, 2013

physics
thanks!
November 27, 2012

physics
A scuba diver must decompress after a deep dive to allow excess nitrogen to exit safely from his bloodstream. The length of time required for decompression depends on the total change in pressure that the diver experienced. Find this total change in pressure for a diver who ...
November 27, 2012

Chemistry
A carbon atom is bombarded by high energy photons with a wavelength of 40 nm. Find how many electrons are ejected and the velocity of the first electron.
November 11, 2012

College Calc
Problem: y=sqrtx ^1/x. Find DY/DX. ln(f(x))=lnx^1/2x or lnx to the 1/2x 1/2x lnx product rule (1/4x^2)(lnx)+(1/x)(1/2x) is the product rule correct? What do i do after this product rule?
October 18, 2012

college math
Find the measures of angles 1 through 5 in the figure shown. if the angles are 78 degrees and 42 degrees.
September 29, 2012

education
Webbing Is A. Teacher created duck theme for classroom B.way to capitalize on children's ideal without enforcement a point to view on them c.planning tool that provides deputy to a topic and creates a map of possible activities and projects d. Technique to ask ...
September 22, 2012

education
Behavioral objectives clearly stated A. What the children will actually do B. How children should behave C. What children are interested D.the range of normal behavioral for children
September 22, 2012

Math
How do I find the unit rate for 17 ounces for $5.00?
September 18, 2012

Learning
Tom has difficulty battling distractions while studying. Which of the following strategies would help him with this problem? A. Taking notes that keep him focused. B. Improving his study environment. C. Adding positive messages to his study area. D. Both B and C.
August 7, 2012

intermediate accounting
explain impotnce of review of accounting cycle
June 18, 2012

grammar
Since we had worked like humans for 8 hours, we finally put a lid on it at 6:00 p.m.
May 17, 2012

life orientation
CANCER
May 7, 2012

physics
When you increase the number of turns in a coil to induce more voltage, you do which of the following?. A) only get more voltage if the resistance of the larger coil remains unchanged.B) None of the above.C) do more work to induce the greater voltage.D) really do get "...
April 17, 2012

physics
What is the key ingredient for electromagnetic induction? A) Motion.B) Energy.C) Force.D) Magnetic charge.E) Electric charge.
April 17, 2012

physics
When you increase the number of turns in a coil to induce more voltage, you do which of the following?. A) only get more voltage if the resistance of the larger coil remains unchanged.B) None of the above.C) do more work to induce the greater voltage.D) really do get "...
April 15, 2012

physics
Which of these is not an application of electromagnetic induction? A) Radio.B) None of these.C) Sound.D) Light.E) All of these are
April 15, 2012

physics
In any region of space where a magnetic field is changing in time, there is which of these?. A) None of these.B) induced electric field, also changing in time.C) All of these.D) even larger magnetic field.E) induced gravitational field.
April 15, 2012

physics
In any region of space where a magnetic field is changing in time, there is which of these?. A) None of these.B) induced electric field, also changing in time.C) All of these.D) even larger magnetic field.E) induced gravitational field.
April 14, 2012

physics
Which of these is not an application of electromagnetic induction? A) Radio.B) None of these.C) Sound.D) Light.E) All of these are.
April 14, 2012

principles of physics
is this motion
April 14, 2012

principles of physics
What is the key ingredient for electromagnetic induction? A) Motion.B) Energy.C) Force.D) Magnetic charge.E) Electric charge.
April 14, 2012

Business math
Beth earns $3450 monthly, she is married and claims two exemptions. Find the FIT withheld from her montly check using the percentage method. I have: 2(195.83)= 391.66 3450-391.66 = 3058.34 0.15(3058.34-517) 0.15(2541.34)= $381 Stacy is single and claims one exemption earning $...
March 2, 2012

Physics
A vibration platform oscillates up and down with an amplitude of 10.2 cm at a controlled variable frequency. Suppose a small rock of unknown mass is placed on the platform. At what frequency will the rock just begin to leave the surface so that it starts to clatter?
February 19, 2012

College Physics
An artificial satellite is moving in a circular orbit with a speed of 6.5 km/s and a period of 80.0 min. A retarding rocket fires in a direction opposite to the motion. This provides a retarding deceleration of 21.0 m/s2. What is the acute angle between the radius vector and ...
February 11, 2012

Physics
john and Sarah participated in a roller skating show. while 75kg john skated backwards at 3.00m/s, 60kg Sarah jumped into his arms with a velocity of 5m/s in the same direction. a. how fast did the pair roll backwards together? b. if john instead skated toward sissy when she ...
December 1, 2011

social studies
when did president nixon get impeached
November 26, 2011

algebra
simplify by collecting like terms if possible 7sqrt20-8sqrt5
November 13, 2011

math
Gloria talked on her cell phone for 320 minutes the first month, 243 minutes the second month and 489 minutes the third month.Her payment package does not allow her to pay per minute;she can only buy packages.If she has to pay $25 for every 200 minutes,how much did she pay for...
November 9, 2011

Organic chemistry
(i) write a proton transfer reaction that may occur, using curved arrows to show electron movements. (ii) write the pKa of the most acidic H on each side of the equation (iii) State whether reactants or products are favored and by how much (A) Phenol + sodium ethoxide (B) ...
October 9, 2011

physics
A 1340 kg car is traveling with a speed of 15.0 m/s. What is the magnitude of the horizontal net force that is required to bring the car to a halt in a distance of 51.5 m?
September 14, 2011

algebra
for a given performance, 4 1/4 times as many tickets were sold as there were seats. If 5100 tickets were sold, how many could be seated in the auditorium?
August 21, 2011

geometry
In thea diagram,ABCD is a trapezium with AB,DC and vertices A(-4;1),B(x;-3),C(1;y) and D.Determine the value of x if the distance AB is 5 units.
July 29, 2011

Algebra
Is there another way 2 think about this problem?
July 26, 2011

science
Is filtered water unhealthy for my fish because the electrolytes have been removed in the process?
July 26, 2011

Math Statistics
Determine which of the four levels of measurement (nominal, ordinal, interval, ratio) is most appropriate. Student's grades - A, B, or C, on a test.
June 26, 2011

Geometry
Triangle DEF is an isosceles triangle with DE = FE. If DE = 5 and ÚD = 75 degrees: what is the length of FE, the measure of angle F, and the measure of angle E? E D ∆ F
June 16, 2011

Geometry
I have a picture of a window showing a square in the center with sides measuring 4 feet, over each side of the square is a semi-circle(a total of 4 semi-circles), how can I find the area of the window? Should I find the area of the square and the semi-circles and add them ...
June 15, 2011

Geometry
The area of a square is 121 sq feet. What is the length of its sides? Would I find this by dividing 121 by 4?
June 15, 2011

history
what did thomas alva edison invent?
June 13, 2011

Statistics
A bag contains 8 red marbles, 3 blue marbles, and 2 green marbles.
June 8, 2011

Elementary Statistics
A class consists of 39 woman and 42 men. If a student is randomly selected, what is the probability that the student will be male?
June 8, 2011

grammar
is oi like in point long sound or short sound?
May 27, 2011

science
why is the root the first part of a plant to grow?
May 26, 2011

Statistics
Find the regression line for this data set. x y 0 23 2 27 2.3 29 4.1 32 5 35
May 20, 2011

algebra
Miranda's financial aid stipulates that her tution not exceed $1500. If her college charges a $45 registration fee plus $ 425 per course4, what is the greatest number of courses for which Miranda can register?
May 20, 2011

Anatomy
The change in the number of olfactory neurons as we age increase the detection of warning smells
May 15, 2011

Statistics
Find the population standard deviation for the data set? 1, 2, 3, 5, 6, 7
May 14, 2011

Math
Suppose the mean heights of a population are 72 inches with a standard deviation of 2 inches. What height (x) corresponds to the z value of 1
May 14, 2011

chem
2.5g X 1mol MgI2/ molar mass = mol MgI2 Molarity= mol of solute/ volume of solution (in L)
April 24, 2011

Chemistry
Thank you so much DrBob! I ended up with 469.5Tf = 8122.54 Tf = 17.3 Thanks again, -Phil
April 24, 2011

Chemistry
I'm having trouble once i get to T(final)=-14.998 X T(final) + 14.998 X T(initial h2o) + T(initial Al) Any suggestions?
April 24, 2011

Chemistry
A 32.5g cube of aluminum initially at 45.8 C is submerged into 105.3g water at 15.4 C. What is the final temp of both substances at thermal equilibrium. Assume the al and the H2O are thermally isolated from everything else) Specific heat cap Al= .903 Specific heat cap H2O= 4....
April 24, 2011

math
what is 34 multiply 56?
March 8, 2011

ENGLISH
What are words with the ending shion except cushion and fashion?
March 8, 2011

Physics
If a bird moves with an initial velocity of 30secs and accelerates at the rate of 40m/s to cover a distance of 70km/hrs.Calculate the final velocity of the bird?
March 3, 2011

Urgent!!! Physics
A)2.86x10^5 B)-6.74x10^-4 C)Who Cares D)WTF?
January 26, 2011

Urgent!!! Physics
A)2.86x10^5 B)-6.74x10^-4
January 26, 2011

Math
I'm also getting 100pi
January 18, 2011

Integrated Physics and Science
IMA is unitless
January 10, 2011

Physics
Question contains pictures: h t t p : / / g o o . g l / M H k y 1 (delete the spaces between the characters for the URL)
November 16, 2010

Physics
(Delete the spaces between the characters for the URL of the question): h t t p : / / g o o . g l / E 9 M X o
November 9, 2010

physics
At a time when mining asteroids has become feasible, astronauts have connected a line between their 3640 kg space tug and a 6500 kg asteroid. Using their ship's engine, they pull on the asteroid with a force of 490 N. Initially the tug and the asteroid are at rest, 500 m ...
November 1, 2010

Physics
The escalator that leads down into a subway station has a length of 28.5 m and a speed of 1.6 m/s relative to the ground. A student is coming out of the station by running in the wrong direction on this escalator. The local record time for this trick is 11 s. Relative to the ...
October 16, 2010

Chemistry
It takes about 10^16 years for just half the samarium-149 in nature to decay by alpha-particle emission. Write the decay equation, and find the isotope that is produced by the reaction.
July 14, 2010

1st grade
5 ways in which the human or environmental problem impacts on the community
April 27, 2010

Pre-Calc (exponential growth)
A COLONY OF BACTERIA IS GROWN UNDER IDEAL CONDITIONS IN A LAB SO THAT THE POPULATION INCREASES EXPONENTIALLY WITH TIME. At the end of the three hours, there are 10,000 bacteria. At the end of the 5 hours, there are 40,000 bacteria. How many bacteria were present initially? I ...
March 28, 2010

Precalc Repost
Hello, I'm trying to figure out how to do this problem, but don't know where to begin. I think some information is missing. Blood Pressure: The function P=120+30Sin 2pi(t) models the blood pressure (in millimeters of mercury) for a person who has a high blood pressure...
March 7, 2010

pre-calc
Hello, I'm trying to figure out how to do this problem, but don't know where to begin. I think some information is missing. Blood Pressure: The function P=120+30Sin 2pi(t) models the blood pressure (in millimeters of mercury) for a person who has a high blood pressure ...
March 7, 2010

math
26 mins x 60 secs/1 min = 26x60 secs= 1560 secs
March 3, 2010

math
A cylindrical jar with height 8 inches and diameter 6 inches is filled to 75% capacity with juice. The juice is then poured into another cylindrical container with a 10 inch diameter and height of 4 inches. a. to what percent of its capacity is the second container filled with...
February 25, 2010

math
The Mustangs and the Bruins play in a basketball tournament. The team that first wins three games wins the tournament. Assuming ties are not possible, find the number of possible ways in which the tournament can occur. I feel like there is not enough information. Can you help?
February 25, 2010

math
ahhhhhh thanks!
February 25, 2010

math
The numbers -3, -4, and 6 are used once and substitued at random for a, b, and c in the equation ax+b=c. What is the probability that x turns out to be negative. I'm not sure where to begin with this. Can you help?
February 25, 2010

Pre Calc
Oh so there is something wrong with the problem! Thanks
February 12, 2010

Pre Calc
To determine the height of the Louisiana-Pacific (LP) Tower, the tallest building in Conroe, Texas, a surveyor stands at a point on the ground, level with the base of the LP building. She measures the point to be 320ft from the building's base and the angle of elevation to...
February 12, 2010

9th Grade Math
Very Good!
February 12, 2010

9th Grade Math
Ok, well you need a system of equations. 5x+3.50y=2265 x+y=543 x=543-y 5(543-y)+3.50y=2265 solve for y and substitute in other equation to solve for x can you take it from here?
February 12, 2010

math repost
1. What is the exact value of csc^2 210degrees - cot^2 210degrees? 2. Can you make a generalization about the value of csc^2 theta - cot^2 theta? I'm not sure what to do, I'm familiar with the terms but not sure how to go about solving the question.
February 11, 2010

Math
What is the exact value of csc^2 210degrees - cot^2 210degrees? Can you make a generalization about the value of csc^2 theta - cot^2 theta? I'm not sure what to do, I'm familiar with the terms but not sure how to go about solving the question.
February 11, 2010

literary
what are t he five propagandas
December 10, 2009

AP Physics - Static Equilibrium
I still don't know get to set up how to solve for the forces of the hands/feet if you don't know their distinct masses and only have the center of mass...
November 27, 2009

AP Physics - Static Equilibrium
I thought W was the center of mass? Also, are you saying to use moment of inertia I to solve, and if so, how would I set up the equations? I'm not good at equilibrium problems.
November 27, 2009

AP Physics - Static Equilibrium
A man doing push-ups pauses in the position shown in the figure. His mass is 75-kg. Determine the normal force exerted by the floor on each hand and on each foot. img145.imageshack.us/img145/7130/picture1n.png (copy into url bar) a = 40 cm b = 95 cm c = 30 cm W = mg = 735 N I ...
November 27, 2009

College mechanic vibration
A half-car model of an automobile suspension system is shown below. You are to design its suspension systems (values of spring constants and damping constants). Generally, for ride comfort, it is desired to have the bounce motion at low frequency and the pitch motion at ...
October 25, 2009

Physics
The diameter of the Moon is 3480km. What is the volume of the Moon? How many Moons would be needed to create a volume equal to the Earth? How do you find the volume of the Moon from just the diameter? Also, does anybody know how to figure out the volume of the Earth?
August 11, 2009

Physics Measurements
So far I've gotten that the volume is 333.3 (repeating) Liters, but I don't understand how to determine the dimensions based on that.
August 11, 2009

Physics Measurements
How big is a ton? That is, what is the volume of something that weighs a ton? To be specific, estimate the diameter of a 1-ton rock, but first make a wild guess: will it be 1ft across, 3ft, or the size of a car? [Hint: Rock has mass per volume about 3 times that of water, ...
August 11, 2009

Engineering
Based on the following labor/material/costs/revenue structure, develop a production plan to maximize profit. You have 40 hours per week at the shown rate at each position type and can plan on 15% additional hours at overtime rates of 150%. You have room for a total of 8 ...
April 19, 2009

Funky Lens Problem
img14.imageshack.us/my.php?image=funkylensproblem.tif
March 10, 2009

calculus
A MANUFACTURE OF LIGHTBULBS HASS SAMPLED 40 BULBS IN ORDER TO DETERMINE THE POPULATION MEAN LIFE OF THE BULBS. tHE SAMPLE MEAN WAS 1200 HOURS WITH A STANDARD DEVIATION OF 100. tHE MANUFACTURER WOULD LIKE TO KNOW, WITH 95% CONFIDENCE, THE INTERVAL VALUES FOR THE POPULATION MEAN.
February 27, 2009

Physics - Buoyant Force
I'm confused about the "1 g gravitational field". What's the 1 g referring to and why is it 1 g?
December 16, 2008

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