# Posts by TOM

Total # Posts: 1,497

physics
Two slits are 0.158 mm apart. A mixture of red light ( wavelength = 65 nm) and yellow green light (wavelength = 565 nm)falls on the slits. A flat observation screen is located 2.24 m away. What's the distance on the screen between the third order red fringe and the third ...

physics
Two point sources produce waves in phase with the same amplitude and wavelength. The sources are a distance d apart. The distance from the right bisector to a point on the second nodal line is x2. The distance between the sources is cut in half. What is the new distance from ...

physics
This is the multiple choice given to me. I was stuck too. Any idea what would be the answer from 4 multiple choice

physics
Two small loudspeakers emit sound waves of the same amplitude and frequency in phase with each other. The waves produce an interference pattern such that the distance from the right bisector to a point P on the third nodal line is x3. The wavelength of the sound is increased ...

math
Find 37.5% of \$320 (which is \$120), and subtract that value from \$320, and your result is \$200.

math
\$200.00

math
2sec^2x - 3tanx - 5 = 0 over the interval 0 to 2pi x= 1.14, 4.28, 5.68, and 2.54 right?

mathh
2sec^2x -3tanx =5 for [0,2pi) Please solve for the values of x for me.

math
and what are the answers

math
2sec^2x -3tanx =5 for [0,2pi)

Math
A ferris wheel has a radius of 20m and the bottom is 2m above the ground. The wheel makes one rev in 40 sec. If the rider gets on at 30^0 on the left of the lowest point going downwards, wirte the sine function to show this movement

Math
Some one gets on to a ferris wheel 30^0 left of the bottom. What would be the phase shift if I am writing a sine Function? Is it -120^0 or + 120^0. Please explain. It's turning counter clockwise.

Math
Some one gets on to a ferris wheel 30^0 left of the bottom. What would be the phase shift if I am writing a sine Function? Is it -120^0 or + 120^0. Please explain.

calc
numerically on a graphing calculator?

calc
lnx = x^3 + 1 i know x=1 but can you solve this algebraically?

Physics
A 72 kg bungee jumper jumps from a bridge. She is tied to a bungee cord whose unstretched length is 12 m , and falls a total of 35 m . Calculate the maximum acceleration she experiences.

Caluclus
Find the point on the line 7x+1y?5=0 which is closest to the point (?2,?6).

precalculus
how to find the max and min of a sine function? For the maximum, do you do midline+ amplitude? For the midline- Amplitude? f(x)= 7cosx + 15 Max is 15+7=22 min is 15-7= 8

information systems
Assignment: You are required to briefly but properly document the functional requirements for an INVENTORY INFORMATION SYSTEM by creating the following using the correct symbols: 1. The description of the selected information system in the selected business 2. Use Case ...

History
have you even looked it up yet?

precalc
y= -2cos(pi/6) + 8 whats the maximum and minimum?

precalc
min is 6 and max is 10?

precalc
y= -2cos(pi/6) + 8 whats the maximum and minimum?

college chemistry
if co2 were soluble in h2o, how would that affect the calculated value for molecular mass of the co2?

CHEMISTRY
thank you very much

CHEMISTRY
The heat evolved in the reaction of hydrobromic acid with potassium hydroxide was determined using a coffee coup calorimeter. The equation for the reaction is: HBr(aq) + KOH(aq) -------------> KBr(aq) + H2O(l) When 25.0 mL of 1.00 M HBr at a temperature of 24.5oC was ...

Chemistry
How many liters of oxygen are required to react completely with 2.4 liters of hydrogen to form water? H2 + O2--> H2O?

Chemistry
Awesome that's what I got too.

math
85=5e^0.025x solve for x

Math
Simplify the algebraic expression: 7-2[3(2x-5)-(5x+3)

Math
Solve for X: 15-(3x-8) = 4x-5(3x-7)-25

Math - Algebra
Solve for X 15-(3x-8) = 4x-5(3x-7)-25

Math - Algebraic expressions
Simplify the Algebraic Expression 7-2[3(2x-5) - (5x+3)]

Math - Algebraic equations
Thanks for the assistance Reiny. Much appreciated

Math - Algebraic equations
A stamp collector bought 295 stamps for \$87.75. The purchase included 5 cent, 25 cent, and 40 cent stamps. How many of each type stamp was purchased?

Math Algebra
A stamp collector bought 295 stamps for \$87.75. The purchase included 5 cent, 25 cent, and 40 cent stamps. How many of each type stamp was purchased?

Physics
In an experiment conducted using the Young's double-slit apparatus, the separation between the slits is 20 µm. A first-order constructive interference fringe appears at an angle of 2.5o from the zeroth order (central) fringe. A. What wavelength of light is used in ...

Statistics
There are two decks of cards. Each deck has a red, a yellow, a blue, and a green card in it. If a card is drawn, from the first deck, and then a second card drawn from the second deck, what is the probability that a red card and green card are drawn (not necessarily in that ...

calculus
ohh i see it cot x = radical 3 / 3 so the tan x = 3 / radical 3 — which is radical 3 when rationalized so x= pi/3? and 4pi/3?

calculus
wait i’m lost so you get radial 3 / 3 Then what ?

calculus
in the second step , don’t you divide by 3 on both sides ?

calculus
3cotx - radical 3 = 0 solve for x please show it step by step

Math please help!!!
Thank you

Math please help!!!
Solve the system of equations to find x,y,z (hint let d=x2 e=y2 and d=z2 . Find d e and f first) 2 means squared I don't have it on my keyboard. X2+y2+z2=9 3x2-y2-z2=7 Y2+2z2 =6

Pre-calc
16/(2x+2)

Pre-calc
Perform the operation and write the result in standard form. ___16___ 2x+2

Pre-calc
Find a polynomial function with -2 and 3-i.

Economics
The pricing of pharmaceutical products can be controversial. A recent example is EpiPen produced by Mylan which is used to treat anaphylaxis. The retail price of an EpiPen is \$300, while industry sources estimate that it costs around \$30 to produce each unit (i.e. one dose). ...

calc
so is it x+y

calc
given that log2 3 = x, log 2 5=y and log 2 7 = z, express log 2 21 in terms of x,y, and z the 2 is the base

calc
tan3x= radical3 / 3

calc
so what about tan3x= radical3 / 3

calc
sin2x = (radical 3)/ 2 solve each equation on the interval [0,2pi)

Computational Thinking
The Happy Cow Ice Cream Company manufactures several types of ice cream. Design a flowchart or pseudocode for a program that accepts an ice cream flavor (for example, “triple chocolate”), price per gallon, and number of gallons sold in the average year. Display a ...

Computational Thinking
Anybody Help on this:The Daily Gazette accepts classified ads in several categories. For most ads, the newspaper charges 10 cents per word for the first 50 words, and 8 cents per word for every word after that. Design a flowchart or pseudocode for a program that accepts data ...

calc
csc -5pi/6 = is it -2?

computer code
Design a pseudocode for a program that accepts an ice cream flavor the price per gallon and number of gallons sold a year, display a message this flavor is the best seller having more than 40000 gallons a year sold

CHEM
lol you're dumb. it clearly asked for an answer for grams and the answer key says it's 100g

CHEM
dude i converted from grams to moles to moles back to grams

CHEM
so the answer is 100g?

CHEM
I know that. The question asks how many GRAMS of Na3PO4 can be made

CHEM
If 100g of NaOH are reacted with 85.00g H3PO4, how many grams of Na3PO4 can be made? Make sure the final answer is in the correct number of sig figs. 3NaOH + 1H3PO4 ---> 1Na3PO4 + 3H2O I got 100g Na3PO4

precalc
does x=-7?

precalc
(-2)^x = - 1/128 solve for x

calculus
if cos of theta= -4/5 and tan of theta > 0, find sin of theta

math
what is 3 5/6 minus 3/4

college chem
a student dissolves 1.0mole of sucrose in 1000 grams of water at 1.0atm. Compared to the boiling point of pure water , the boiling point of the solution is?

college chem
a 16 gram sample of oxygen has a volume of 11.2L at standard pressure . what is the temp of the oxygen ?

Math - trigonmetric functions
Determine whether -105° and -465° are co-terminal angles and can you show me the steps of how you did it

Stats
it says 0.053 is wrong

Stats
In the game Roulette, a ball spins on a circular wheel that is divided into 38 arcs of equal lenght, numbered 00, 0, 1, 2, ... , 35, 36. The number on the arc on which the ball stops is the outcome of one play of the game. The numbers are also colored as follows: 1, 3, 5, 7, 9...

maths
one number multiplied by three less than itself equals 18. If that number is positive, what is it? Please show working.

Algebra
Write an absolute value inequality to fit the graph below: There is a Number line with 14 on the left and 26 on the right with solid dots on both.

Physics (Mirror Rays)
Lol, thanks.

Physics (Mirror Rays)
3. When an object is located very far away from a convex mirror, the image of the object is 18 cm behind the mirror. Using a ray diagram drawn to scale, determine where the image is located when the object is placed 9.0 cm in front of the mirror. Note that the mirror must be ...

Physics
A 3-kg mass has a speed of 5.0m/s at the bottom of a 37 degree incline. How far up the incline does the mass slide before it stops if the friction force acting upon its motion is 20N? Thanks.

Math
In a middle school computer club, 3/8 of the members are girls. Of the girls in the club, 2/5 are 6 graders. Write and solve an equation to find the fraction of the members of the club that are 6 grade girls

chem
i got 12.5g am i right?

chem
if 4.1g of Cr is heateed with 9.3g of cl, what mass of crcl3 will be produce

math
given cot theta = 11/12, find tan of theta and sin of theta

Statistics
The correlation coefficient between X and Y is the same as the correlation coefficient between Y and X: True or False - I believe it is True because calculating the correlation coefficient for X and Y and Y and X will give you the same answer.

Chemistry
Identify the acid-base pairs in the following reactions HSO4^1-(aq) + OH^1- <==>SO4^2-(aq) + H2)(I)

English
A similie , metaphor (etc) for relief??

math
if logb C= A, explain why logb 1/c = -a

chemistry
60.0 g of iron that has an initial temperature of 250 degrees C and 60.0 g of gold that has an initial temperature of 45.0 degrees C are brought into contact with one another. Assuming no heat is lost to the surroundings, what will be the temperature when two metals reach ...

chemistry
Suppose a balloon is filled so that its volume is 2.00 L when the pressure is 1.10 atm and the temperature is 300k. What volume will it occupy if it rises to an elevation where the pressure is 418mm Hg and the temperature is 200k?

Chemistry
A gas occupies 56.44 L at 2.00 atm and 310 K. If the gas is compressed to 23,520 mL and the temperature is lowered to 281 K, what is the new pressure in torr?

economics
the elasticity

economics
Explain why we can’t predict tax revenues by using the amount of the tax and the previous time period’s consumption.

economics
cost effectiveness means you are not reaching the efficiency

algebra 2
what is the inverse of the function f(x) = 6+x ----- 2x

computer programming
Create the psuedocode for an application class named Monogram. Its main() method holds three variables that hold your first, middle, and last initials, respectively. Create a method to which you pass the three initials and that displays the initials twice—once in the ...

World history
Why are you cheating on this test?

American Government
Tahahahaha Literally

physical science
Newton's second law. The heavier object has more mass, and acceleration is direc tly proportional to force and inversely proportional to mass.

physical science
Newton's second law. The heavier object has more mass, and acceleration is direc tly proportional to force and inversely proportional to mass.

Physics
the graph is not shown.

Physics
the graph is not shown.

science physics solar
. 6 x 72 because the voltages are additive in series.

Calculus
I = A/s^2 + 8A/(600-s^2) where I = illumination, s = distance from A, A is a constant Take the derivative of I relative to s, set to zero, and solve for s, the distance

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