Sunday
April 20, 2014

Posts by John


Total # Posts: 6,091

math: elapsed time
somebody answer this question, i really need help!

math: elapsed time
i need a website that would teach me every thing about elapsed time. it's really kind of confusing to me

11Science
Inherited traits

math
so it would be like, 5/8 ? 6/7 8,16,24,32,40,48,56,64 7,14,21,28,35,42,49,56 LCD IS 56 so now i do 56/7=8*6=48 6/7=48/56 56/8=7*5=35 so, 5/8=35/56 5/8 (35/56) < 6/7 (48/56)

math
so it's like you do this -> 2,4,6,8,10,12 3,6,9,12,15,18,21 4,8,12,16,20 and one more question, what about the numerators? like if you're comparing 3/8 to 2/5 the common multiple is 40. the numerators?

math
how do you change them into equivalent decimals and same denominators?

math
how to you compare 8 fractions with different denominators including improper fractions?

Chemistry
How would you prepare 10.0 Liters of a solution that was 20 parts per million sodium perchlorate in water? What would be the molarity of the solution (assume density is 1.0 g/mL and 1ppm=1 mL/L)?

Social Studies 7R - DBQ Essay Check
yes. really n.o.c

geometry
3x + y + 7 + 90 = 180 deg. how to solve?

physics
differentiate between density,mass and volume. state a formula in terms of mass density and volume. using the formula calculate the volume of a 10kg block of ice

statistics
A professor teaches two different subjects (history and sociology) in an ethnically diverse college. She wants to know how much interest students have in prominent political figures. She reasons that knowing this will help her plan for future lectures. She asked students to ra...

statistics
Now, let’s look at a situation in which we compare three college math teachers to each other with respect to how interested they keep their students. The study was conducted among freshmen enrolled in an introductory course. The unit was quadratic equations. Students were...

statistics
. A professor is interested in knowing the correlation, if any, of students’ scores on the first and second exams given in his class. Test 1 Test 2 92 86 90 87 89 85 82 90 88 79 92 90 100 92 91 84 Is there a significant correlation? Explain its statistical significance, i...

statistics
A professor is interested in knowing the correlation, if any, of students’ scores on the first and second exams given in his class. Test 1 Test 2 92 86 90 87 89 85 82 90 88 79 92 90 100 92 91 84 Is there a significant correlation? Explain its statistical significance, if ...

statistics
An art professor was interested in seeing what size group is best to prime the pump so to speak to encourage strangers to gather together in front of various exhibits at her art show, so she set up an experiment. In a municipal building off campus, she asked a group of two stu...

english
dont fear th1 Crush" - Garbage Local God - Everclear "Angel" - Gavin Friday "Pretty Piece of Flesh" - One-Inch Punch Kissing You (Love Theme from Romeo + Juliet) - Des'ree – "Whatever (I Had a Dream)" - Butthole Surfers Lovefool - Th...

english
i need to create a eight song soundtrack and how they relate to romeo and juliet play.

english
i need to find eight songs so i can put on asound track and how they relate to eight acts it can be any eight acts

english
i need to chose at least 8 songs and how they relate to romeo and juliet acts

Math
Log8 4 + log16 2 x log 27 81= x solve for x

Physics
A 0.13 kg bullet traveling at 614 m/s hits a 5.7 kg block of wood and stays in the wood. What is the velocity (speed)of the wood block immediately after the bullet hits it

Chemistry
What volume of 6.00 M nitric acid is needed to prepare 250. mL of 0.750 M nitric acid?

Chemistry
What mass of KH2PO4 is needed to prepare 500.0 mL of a 0.067M solution?

math
A rectangular lot has an area of 216.795 square meters and a width of 9.7 meters. Nick calculated the length of the lot to be 2.235 meters. Without solving, is Nick's calculation correct?

physics
a point charge q2 equals negative 2.1 micro C is fixed at the origin of a coordinate system. another point charge q1 equals 4.1 micro C is initially located at point p a distance d1 equals 6.1 centimeters from the origin along the x axis

chemistry
In a coal-fired electric generating plant, the coal is pulverized before being mixed with air in the incinerator. Use the collision theory to explain why the coal is pulverized.

algebra
Simplify 1+2/x / 1/x - 2/x^2

Math
Can you help me solve this problem? Cuz i cant seem to figure it out. An orbiting satellite traveled 3,225 miles in 40 minutes. Find its speed in miles per hour. (Round your answer to the next whole number.) (a)103 (b)4,838 (c)4,267 (d)6,200 (e)150

Finance
What is the present value (or purchase price) of an annuity product which will pay you $2,000 at the end of each year for the next 15 years? Use an interest rate of 9%.

Math
A scale model of a house is 1 foot long. The actual house is 50 feet long. In the model, the window is 1 1/5 inches high. How many feet high is the actual window?

physics
a 2.5 kg mass is connected to a spring. when a 4N is applied to the spring it compresses 2cm. if the spring is stretched and then the mass is released, what would be the period of the motion.

physics
Normally the rate at which you expend energy during a brisk walk is 3.6 Calories per minute. (A Calorie is the common unit of food energy, equal to 4184.1 J.) How long do you have to walk to produce the same amount of energy as a 100 W lightbulb that is lit for 8.4 hours? Answ...

physics
Normally the rate at which you expend energy during a brisk walk is 3.6 Calories per minute. (A Calorie is the common unit of food energy, equal to 4184.1 J.) How long do you have to walk to produce the same amount of energy as a 100 W lightbulb that is lit for 8.4 hours? Answ...

Math
I tried using my calculator and punching in the choices to figure out what x is and none of them equaled -10 so idk what i did wrong Find the value of x that will make the following numerical expression equal to − 10 . -5^2+(x+2)/-4-(-6) (a)−1 (b)−3 (c)2 (d)1...

Chemistry
Yea I could have used the help on this question instead of answering a question with a question. I needed to know the set up, clearly I'm not entirely sure. I see you do this on a few posts Dr. Bob

Physics
In a game of American football, a quarterback takes the ball from the line of scrimmage and runs backwards for 10 yards, and then sideways to the left, parallel to the line of scrimmage for 15 yards. At this point, he throws a forward pass at the angle of 60 degrees with respe...

college algebra
an isosceles triangle has at least two sides of equal length. Determine whether the triangle with vertices (0,0), (3,4),(7,1) is isosceles.

Physics
A basketball is released from a height of 3m onto a hard surface. What height will the ball rebound to and why ?

math
20 mg = 20 x 10^-3 g 90 mcg = 90 x 10^-6 g no. of doses = 20 x 10^-3 / 90 x 10^-6 = 222

Physics
Can you please explain how to find time by using step by step.

Physics
urprisingly, very few athletes can jump more than 2.2 ft (0.66 m) straight up. Use d = 1/2 gt2 and solve for the time one spends moving upward in a 2.2 foot vertical jump. Then double it for the "hang-time" -- the time one's feet are off the ground.

math
Gwen was planting tomato plants in a row 6 2/3 yards long. She put the plants 2/3 yard apart. How many plants were in the row?

chemistry
if 3.60g of NaCl is dissolved into 75.00mL of water, what is the concentration of this salt solution, in m/v%?

math
10 friends share 7 dollars,what is the fraction?

math
marcia said that if she estimates 73 x 7 ,the product will be less that the exact answer. is she correct ? explain.

Calculus
Use the method of cylindrical shells to find the volume V generated by rotating the region bounded by the? Use the method of cylindrical shells to find the volume V generated by rotating the region bounded by the given curves about y = 8. 27y = x^3, y = 0, x = 6 V=

programming
Write pseudocode (using pascal) to accept as input names of an unspecified number of equipment rented, the name of the company, the number of days the equipment was rented for and the sales amount. The algorithm must determine the number of times each type of equipment was ren...

programming
Write pseudocode to accept as input names of an unspecified number of equipment rented, the name of the company, the number of days the equipment was rented for and the sales amount. The algorithm must determine the number of times each type of equipment was rented, as well as...

Math
If REINY was reading story problems and if he did not know the algorithm steps to share to a simple problem, would he have time to be sarcastic?

math
126 books were donated to the school. there are seven classes and each will get an equal number of the books for its classroom library. how many books will each classroom get?

COLLEGE MATH- SYSTEMS OF EQUATIONS
a. A movie theater sold 450 tickets to a movie. Adult tickets cost $8 and children's tickets cost $6. If the theater took in a total of $3,250 from ticket sales, how many of the tickets were adult tickets and how many were children's tickets?

college soc 120
utilitarianism, deontology, and virtue ethics of gay marriage

algebra
mary went to the store for some fruit. The apples were $1.00 per pound and the oranges were $0.50 per poumd. She spent $5,00 all together and took home a total of 8 pond of fruit. How many ponds of apples and oranges did she buy?

soc.
The outlawing of slavery and extending voting rights to women seem to indicate that ethics can have beneficial results. Give an example from the past that indicates a similar result or a current social policy that might be regarded as wrong, which therefore needs to be changed...

Math
Solve for x in terms of y: y = (x^3/4)-(x^2/3)-(x/2)+3cosx

physics
in the hydraulic machine shown, you observe that when the small piston is pulled down 10cm, yhe large piston is raised 1 cm. if the small piston is pushed down with a force of 100n, what is the most weight that the large piston can support?

geometry
Lines M and T are parallel with a Transversal line P. [Labeling for the angles on line P intersecting M are, top right corner is angle 1, the top left is angle 2, the bottom left is angle 3, and the bottom left is angle 4. This pattern {top left, top right, bottom left, bottom...

math
How many branches will the number 17 have in its completed factor tree?

math
What is the value of point X on the number line?

Physics
10.6

math
John studied for 22.5 hours over a period of 3.5 days. On average, about how many hours did he study each day?

physics
Two boats start together and race across a 42 km wide lake and back. Boat A goes across at 42 km/h and returns at 42 km/h. Boat B goes across at 21 km/h, and its crew, realizing how far behind it is getting, returns at 63 km/h. Turnaround times are negligible, and the boat tha...

physics
Two boats start together and race across a 42 km wide lake and back. Boat A goes across at 42 km/h and returns at 42 km/h. Boat B goes across at 21 km/h, and its crew, realizing how far behind it is getting, returns at 63 km/h. Turnaround times are negligible, and the boat tha...

physics
Two boats start together and race across a 42 km wide lake and back. Boat A goes across at 42 km/h and returns at 42 km/h. Boat B goes across at 21 km/h, and its crew, realizing how far behind it is getting, returns at 63 km/h. Turnaround times are negligible, and the boat tha...

physics
Two boats start together and race across a 42 km wide lake and back. Boat A goes across at 42 km/h and returns at 42 km/h. Boat B goes across at 21 km/h, and its crew, realizing how far behind it is getting, returns at 63 km/h. Turnaround times are negligible, and the boat tha...

physics
Three point charges are fixed in place in a right triangle. What is the electric force on the q = -0.63 µC charge due to the other two charges? (Let Q1 = +0.83 µC and Q2 = +0.9 µC.) what is the magnitude N, and direction in degrees ° above the positive x-...

physics
A rocket moves straight upward, starting from rest with an acceleration of +25.5 m/s2. It runs out of fuel at the end of 4.26 s and continues to coast upward, reaching a maximum height before falling back to Earth. (a) Find the rocket's velocity and position at the end of ...

physics
A rocket moves straight upward, starting from rest with an acceleration of +25.5 m/s2. It runs out of fuel at the end of 4.26 s and continues to coast upward, reaching a maximum height before falling back to Earth. (a) Find the rocket's velocity and position at the end of ...

physics
A stunt woman sitting on a tree limb wishes to drop vertically onto a horse galloping under the tree. The speed of the horse is 13.5 m/s, and the woman is initially 2.60 m above the level of the saddle. (a) What must be the horizontal distance between the saddle and limb when ...

calculus
Find the limits Lim(sin kt/t) t approaches 0 and (K is constant) How do you start this and go about it stepwise? Does knowing (K constant) help me to solve this?

chemistry
If 22.40g of potassium react with silver sulfide what mass of each product will form?

chemistry
What mass of aluminum hydroxide will be produced when 0.460 grams of aluminum sulfide react with water? How many grams of hydrogen sulfide are produced, according to the following equaton? Al2S3 + H20 -------> Al(OH)3 + H2S

math
An electron moving along the x axis has a position given by x = 14te^-5t m, where t is in seconds. How far is the electron from the origin when it momentarily stops?

chem
thank you

chem
calculate the PH of [OH-] = 4.5×10−3 M Please show how you work this problem.

CHEM
Write an equation for the acid–base reaction between ammonium ion and sulfate ion. a. why does the equillibrium favor the reactants? This was my answer NH3+H2O--><--(NH4)2SO4

CHEM
thank you

CHEM
so the temperature doesnt have a whole lot to do with this reaction?

CHEM
Which of the following reactions should be fast at room temperature? Which would be slow? Explain A. KCl+AgNO3->KNO3+AgCl B. H2(g)+Cl2(g)->2 HCL(g) I would assume that B would react faster because it has all gases.??

chem
Thank You

chem
ok so A.20 seconds B. 80 seconds C. 120 seconds

chem
the lower the temperture the longer it should take correct?

chem
IF a reation generally takes 40 seconds to occur at 45 degrees C, how long should the reaction take a t the following temperatures? A. 35C B. 55C C. 65C

maths
what is ?

Chemistry
Is liquid-liquid extraction or solid-phase extraction a better approach to process very large amounts of water?

chemistry
40.0 x 10^3 divide by 400 x 10^-3 = 100 000 tablets

science
Messenger RNA (mRNA)

physics
distance covered in first two hours = 40 mph x 2 = 80 miles distance to be covered in the remaining three hours = 400 - 80 = 320 miles average speed for remaining three hours = 320 / 3 = 106.667 mph

physics
distance covered in first two hours = 40 mph x 2 = 80 miles distance to be covered in the remaining three hours = 400 - 80 = 320 miles average speed for remaining three hours = 320 / 3 = 106.667 mph

algebra
tow company A charges $50 + m and company C charges 80 + .1m. If both companies charged the same, how far are you from your garage? Are they asking for 2 different #? If so,I am 30 miles from A and 0 miles from C. Correct?

Math
76 degrees and 76 degrees 28 degrees and 124 degrees

Math
y = x - 1

PHYSICS
Impulse = Change in momentum = F x t = 27.3 x 0.18 = 4.9 Ns

physics
x = x(initial) + v(initial)t + 1/2 at^2 0 = 1.5 + 0 + 1/2 (-10)t^2 1.5 = 5 t^2 t = 0.55 seconds v = v(initial) + at v = 0 + (-10)(0.55) v = -5.5 m/s (i.e. it will reach the ground at 5.5 m/s)

STRESS MANAGEMENT TECHNIQUES
Which of the following physiological symptoms are signs of stress? A. Hearing and vision loss B. Arthritis and carpal tunnel syndrome C. Headaches and elevated blood pressure D. Dental cavities and bone loss

Algebra I
ARGBEBTGWEV%$WT@$WC$$$$$$EV#QT%EW UH%VHTWECX

Physics
A man can throw a ball a maximum horizontal distance of 175 m. The acceleration of gravity is 9.8 m/s^2. How far can he throw the same ball vertically upward with the same initial speed?

math
9000

chemistry
How many grams of 5.400 wt% aqueous HF are required to provide a 50% excess to react with 14.0 mL of 0.0236 M Th4+ by the following reaction? Th4+ + 4F - → ThF4 (s)

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