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Posts by DJ

Total # Posts: 292

physics
D)

math
15 x w + 51 =105 +51 ?

Organic Chemistry
what is the major product of a reaction with 1-butene and Br2 in water?

Chemistry
What is the ionic equation for hydrolysis reaction of NH4C2H2O2 ? Thanks.

Math
Can someone help me to find two numbers the exact answer is between: 6 x 7,381

physics
A boat that travels at a speed of 6.75 m/s in still water is to go directly across a river and back, as shown in the figure below. The current flows at 0.50m/s At what angles must the boat be steered? How long does it take to make the round-trip? (Assume that the boat's ...

algebra/trigonometry
find the smallest positive number that is the difference of two three-digit integers made up of the digits 1, 2, 3, 6, 7, 8 where each digit is used once.

math
1/3 1 /4 . 035 13%greatest to least

chemistry
what is the change in heat when 23.5g water vapor at 100C condenses to liquid 18.50C

physics
b. If you are cruising down the road at 50 mph and a policeman with a radar gun (wavelength 1 cm) reflects radar light off your bumper, what wavelength of radar light does he get back? Assume the policeman is stationary, and you are moving towards him. Light that gets ...

math
I have a surface area? my base is 18m, height is 4m and wisdth is 14m - do not understand the equation given by teacher of: top bottom, both sides and front and back to get answer - this does not make sense to me - please explain

physics
250N,1020N,1.2N

Chemistry
make sure to convert millimolar to molar

Chemistry
Part 1 is A Part 2 is C none of the above

physics
The correct answer is C, A, B

math
a = 19 and m<A=32 degree. find b

calculus
int_(-2)^2sqrt(4-x^2)text()dx evaluate the integral

calculus
int_(-2)^2sqrt(4-x^2)text()dx evaluate the integral

math
what is the largest prime less than 1000? explain how you got ypur answer

math problem
very confused could someone help me with this using the elimination method 5r-3s=16 3r+5s=30

Math Problem
how is it to solve for the indicated leter L = 7F, FOR f

math problem
8x-(6x+7) =-3 42x + 7=-3 42+7-7= -3-7 x=10 42/10 = 4.2

math problem
haveing problem solving 8x -(6x+7)= -3 The solution is x =

MATH PROBLEM
COULD I GET HELP SOLVING THIS PROBLEM USING THE DISTRIBUTIVE PROPERTY 5(W-5)= 10 W =

Math Question
could some help me with this problem Solve and steps -0.5x < -15

math question
solve using additin and multiplication principle 6+8x<22

Math question
Please help me to solve by substitution method. 7x+8y =44 x=41-5y

Calculus
(y/(x+9y))= (x^2)-7 at the point (1, -6/55) Use implicit differentiation to find the slope of the tangent line to the curve

Calculus
Use implicit differentiation to find the slope of the tangent line to the curve 2(x^2) + 2xy + 2(y^3)= -18

Calculus
f(x)= 6ln(2x+7ln(x)) I need to find the first derivative.

Chemistry
24.5 mL of concentrated HCl is diluted to make 455 mL of .256 M solution. What is the molarity of the concentrated HCl?

Calculus
(A) Given that P = {X0, X1, X2.......Xn} is an arbitrary partition of [a,b], find the lower and upper sum for f(x)=x+3. (B) Use your answers to part (a) to evaluate the integral of f(x) from a to b.

Calculus
A right circular cone is inscribed in a sphere of radius r. Find the dimensions of the cone that maximize the volume of the cone.

Calculus
Show that of all rectangles with diagonal length c, the square has the largest area.

physics
ohh.. now i've got it thank you

physics
You are given a vector in the plane that has a magnitude of 86.0 units and a component of -30.0 units. What are the two possibilities for its component?

Calculus
show lim x->3 (sqrt(x)) = (sqrt(c)) hint: 0< |sqrt(x)-sqrt(c)|= (|x-c|)/(sqrt(x)+sqrt(c))<(1/(sqrt(c))*|x-c|

math
the number of my hunderds plus the number of my thousandsin 3. the number of my tens is 7 times the number of my hundreds. the number of my ones is 3 times the number of my thousands. allmy digits are differnt. what number am i ?

BUSN
$1,000,000 and $800,000 respectively

geometry
the surface area of a prism is 120 sqaure cm and the area of each base is 32 square cm find the lateral area of the prism.

Math
How many grams of saline are needed to make 300 ml of 0.9%(w/v) saline?

Algebra 2
Solve the equation 6(3x + 1) = 8. Round the answer to four decimal places.

statistics
A vending machine dispenses coffee into a sixteen ounce cup. The amount of coffee dispensed into the cup is normally distributed with a standard deviation of 0.03 ounces. You can allow the cup to overfill 10% of the time. What amount (in ounces) should you set as the mean ...

science 4grade
Maybe you meant "compete"? To compete means to try to win or do better than others. Based on your example (which are plants), when they get crowded, the amount of resources intended for them has decreased to a very small amount. This amount cannot sustain their needs...

Physics 101
I figured it out already, thanks. I was just having trouble with converting dB to W/m^2. Anyway, here's my answer. Feel free to correct it. I - Intensity P - Power E - Energy t - time A - Area I = P/A ; I = E/t / A ; E = IAt Io = 1x10^-12 W/m^2 (treshold of hearing) ...

Physics 101
A 90-dB sound is absorbed by an eardrum 0.75 cm in diameter for 2 hours. How much energy in joules does the eardrum absorb at that time?

education
what are strategies that a concerned parent can us to help improve his or her child's reading and writing skills

Physics
explain the concept of electric potential difference in terms of work done in transferring the charge

Chemistry I
If the theoretical yield of a reaction is 0.173g and the actual yield is 0.165g , what is the percent yield?

Statistics
A computer manufacturer is about to unveil a new, faster personal computer. The new machine clearly is faster, but initial tests indicate there is more variation in the processing time. The processing time depends on the particular program being run, the amount of input data, ...

Physics
A patient has a far point of 34.6 cm and a near point of 26.0 cm. What power (in diopters) should be prescribed to give the patient normal vision for: (a) contact lenses? 1) D (b) glasses which are worn 0.9 cm away from the patient's eyes? 2) D

management
Given the following amount of work in seconds required at each station: _____________________ A 38 J 32 X 22 B 34 K 30 Y 18 C 35 L 34 Z 20 a. What is the possibility daily output of this “process” if 8 hours of processing time is available each day?

4th grade math
you find out

4th grade math
help!

4th grade math
53

4th grade math
thank you

criminal justice
what are 2 major influencing factors and how dose federal sentencing guidelines have an effect on these influences

chemistry
what is the molecular mass of a solute if a solution containing 150 g of that solute and 1.0 kg of water has a boiling point of 102.0 degree c? (Kb= 0.512 degree C/m)

Math
there are a lot of them but i chose 1, 4, 8,10

physics
A long jumper jumps with the initial velocity of 12.0 m/s at an angle of 20 degrees. what is the displacement of x?

Pearson
0.0195

math
The carpenter wants to make a dresser based on the dollhouse furniture. The scale is 5\2in : 1ft. The height of the dollhouse is 10in. What is the height of the carpenter's dresser.

math
A building 35ft tall casts a shadow 105ft long .Patty casts a shadow 16.5 ft long. how tall is Patty?

math
thank you !!!

math
A fence post 3ft tall casts a shadow 16ft long . At the same time ,the barn casts a shadow 96ft long. how tall is the barn?

calculus
Find the formula for the described function and state its domain. An open rectangular box with a volume of 8 cubic meters has a square base. Express the surface area of the box as a function of S(x) of the length x of a side of the base.

algebra
what is the average height of a softball that is pitched to a batter from 45 feet away?

5th grade SCIENCE
Why is a short curcuit called a short curcuit?

Math
The answer according to the calculator is 15.What I think the answer is 45.

Chemistry
If 920 mL of 0.0402 M aqueous LiOH reacts stoichiometrically according to the balanced equation, what mass (g) of gaseous CO2 is required? 2 LiOH(aq) + CO2(g) → Li2CO3(aq)

chemistry
How many {\rm NO}_{2} molecules would form as products if the reaction had a percent yield of 75\%?

college physical science
jdjdj

math
t over 30

geometry
How much foil is required to cover a rectangular box that is 4in. by 8in. by 5in.? use 3.14 as an aproximation for pi. where appropriate.

geometry
in triangle abc angle b is 3 times angle a and angle c is 8degrees less than 6 times angle a?

Geometry
A regular hexagon is made from equilateral triangle by cutting along the dotted lines and removing the three smaller triangles. if triangle has a perimeter of 18, what is the perimeter of hexagon?

english
underline complete subject and complete pedicate to my sentences. The boys and girls studied different kinds of measures.

Geometry
Lines l and m have an intersection at point O and any reflection in l followed by a reflection in m results in a rotation about point O of 136 degrees. What is the acute angle between l and m? Thank you!!

Chemistry
1.61 hours

math
how to work out the answer to 0.08 divided by 0.7, it dividing decimals

Physics
Two Q = +6.72 mC charges are placed at opposite corners of a square d = 1.5 m on each side, and -Q = -6.72 mC charges are placed at the remaining corners, as shown in the figure. Q___________-Q | | | | | | | | -Q__________Q

6th grade
what is the LCM of 8,and 19

physics
n a physics lab experiment, a spring clamped to the table shoots a 21 g ball horizontally. When the spring is compressed 20 cm , the ball travels horizontally 5.2 m and lands on the floor 1.5 m below the point at which it left the spring.

physics - PLEASE HELP
A person whose eyes are H = 1.62 m above the floor stands L =2.24m in front of a vertical plane mirror whose bottom edge is 43 cm above the floor. What is the horizontal distance x to the base of the wall supporting the mirror of the nearest point on the floor that can be seen...

physics
A piano tuner hears one beat every 2.8 s when trying to adjust two strings, one of which is sounding 440 Hz, so that they sound the same tone. How far off in frequency is the other string?

accounting
what is the quality of the disclosures for guarantees and commitments for nortel networks corporation? and could these disclosures be improved?

Physics - Momentum
A ball of mass m makes a head-on elastic collision with a second ball (at rest) and rebounds with a speed equal to one-third its original speed. What is the mass of the second ball?

Physics - Momentum
A child in a boat throws a 5.60 kg package out horizontally with a speed of 10.0 m/s. Calculate the velocity of the boat immediately after, assuming it was initially at rest. The mass of the child is 22.0 kg and that of the boat is 55.0 kg.

MATH
Joe bought 2 dozen eggs at the store. On the way he dropped the eggs and broke 3/4 of them. How many eggs broke?

MATH
Carmen spent 4 hours at the Y on Saturday. Two thirds of that time she spent in the gym. How many hours did she spend in the gym?

home economics
what are ten careers in home economics

Physics Work and Energy
A 55 kg trampoline artist jumps vertically upward from the top of a platform with a speed of 5.5 m/s. (Ignore small changes in gravitational potential energy.) (a) How fast is he going as he lands on the trampoline, 3.0 m below? (b) If the trampoline behaves like a spring of ...

Physics - Work and Energy
Jane, looking for Tarzan, is running at top speed (3.6 m/s) and grabs a vine hanging vertically from a tall tree in the jungle. How high can she swing upward? Does the length of the rope matter?

accounting
Question 2.) Hawkeye Electric Company engaged in the following transactions during July. July 2 – Purchased inventory for cash, $800 July 5 – Purchased store supplies on credit terms of net eom, $600. July 8 – Purchased inventory of $3,000, plus freight charges ...

phyics-universal gravity
Calculate the force of gravity on a spacecraft 6400 km (1 earth radii) above the Earth's surface if its mass is 1600 kg.

Pre- Caluculus
Find the time at which the depth of the water in the tank is eual to half its initial depth. D(t)=sqrt(100-2t) the tank is empty when t=50 min

social studies
What is the province of Charlottetown Canada?

physics
A window washer pulls herself upward using the bucket-pulley apparatus. The mass of the person plus the bucket is 69 kg.How hard must she pull downward to raise herself slowly at constant speed?If she increases this force by 11 percent, what will her acceleration be? There is ...

Physics
okay well i am confused about the way you can figure out the acceleration if the tension is increased by 11%

Physics
no since there is only one pulley then there is only one rope and if there is only one pulley and one rope there is only one tension

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