Monday
November 24, 2014

Posts by Adam


Total # Posts: 847

physics
A space station Radar locates sattelites A and B at a certain moment: A_0=(a_1,0,1^3), B_0=(0,b_2,b_3) the space station is located at (0,0,0) and the sattelites moves with a uniform velocity related to the space station: v_A=(V_A,0,0), v_B=(V_B,V_B,0) what is the minimal ...
November 2, 2014

PE
Sarah is being chased down on the base paths during her softball game. What sport skill is she using most often as she goes back and forth trying to avoid being tagged by the fielders?
October 31, 2014

Algebra 1
A car is traveling at a rate of 80 kilometers per hour. Set up the equation that would convert the speed to meters per second. Then evaluate
October 11, 2014

Chemistry
a) A sprinter must average 24.0 mi/h to win a 100-m dash in 9.30 s. What is his wavelength at this speed if his mass is 84.5 kg? b) For potassium metal, the work function W (the minimum energy needed to eject an electron from the metal surface) is 3.68 × 10-19 J. Which ...
October 5, 2014

Math Growth Rate w/ inflation
In a country where inflation is a concern, prices have risen by 50 % over a 3-year period. (a) By what percent B do the prices rise each year? Find the time t it takes for prices to rise by 8% Enter your answers to two decimal places. b = ____ % t = _______ years (b) ...
October 3, 2014

english
in the sentance " They decided that the hedge needed a trim" what part of speech is the word "trim"
October 1, 2014

Physics
Using the kinematics equation for displacement of an object under constant acceleration, d = v0t + 1/2 at^2 (where d is distance, v0 initial velocity, a acceleration, t time), we can solve for t. This equation looks like: t = √(2d/a) (v0t drops out since it is 0 at ...
September 29, 2014

physics
Momentum is found by multiplying mass by velocity. Since both skaters start with 0 momentum, by conservation of momentum, we know that they will have identical momentum (in opposite vector directions). This is shown as m1v1=m2v2. So, (48kg)(0.65m/s)=(X)(0.84m/s) solving for X ...
September 29, 2014

chemistry
Good catch DrBob. Fat fingers on calculator. Another reminder to check work.
September 29, 2014

chemistry
Small correction... For the final mass of silver, I intended to write 5.733x10^-1 kg, which is also shown as 0.5733 kg silver.
September 29, 2014

chemistry
Density is a measurement of mass per volume. In this example, density of silver is 1.050 x 10^4 kilogram per cubic meter (1 cubic meter silver would have 10500 kg mass). You should solve for the volume of the ingot, then multiply by density to find mass. ingot volume = 1.0 cm ...
September 29, 2014

science
Mass doesn't change. The astronaut's mass would remain 60kg on Mars. Weight can be expressed as the force of an object due to gravity. Newton's second law described force being equal to mass x acceleration. Changing these terms to show weight (W) as force (measured...
September 29, 2014

Physics
My apologies... I neglected to multiply out the density of mercury, which yields 811.79g mercury. Solving for h then shows that water cylinder is 1033.6 cm. (13.6 g/cm^3)((π(0.5cm)^2)76cm) = (π(0.5^2))h
September 29, 2014

Physics
The mass of the mercury in the cylinder can be calculated by multiplying density x volume. Volume of a cylinder with radius (r) and height (h) is (πr^2)h. Remember radius is 1/2 diameter. So, mass of mercury = (13.6 g/cm^3) x ((π(0.5cm)^2)76cm = 59.67 g. The height ...
September 29, 2014

City of the Beasts by Isabel Allende
Doesn't matter now, I've done it!!!
September 21, 2014

City of the Beasts by Isabel Allende
Write about why out think the Indians/Villagers may of invented the character of the Beast.
September 21, 2014

math
8 8/2=4 4/2=2 /=divided by
September 21, 2014

Chemistry
What do you mean by "exothermic"? I'm only year 9
September 21, 2014

Chemistry need help with ASAP
Its in for tommorow
September 21, 2014

Chemistry
The student wanted to be sure he had made Calcium Oxide. He crushed some heated limestone and added water. The mixture got hot. The student cooled the mixture and filtered it. This gave a colourless solution and a white solid that was left in the filter paper. The student ...
September 21, 2014

math:ratios
Lamika buysc12 packs of juice boxes that are on sale and pays a total of $48 by using ratio table to determine how much will Lamika pay to but a 8 more packs of juice boxes at the same store.
September 18, 2014

English 12
Which theme from Macbeth do these lines support? "This supernatural soliciting Cannot be ill, cannot be good. If ill, Why hath it given me earnest of success, Commencing in a truth?" A) Those without convictions are easily manipulated. B) Darkness is dangerous. C) ...
September 13, 2014

math
thanks reiny
August 15, 2014

math
If a bicycle wheel has traveled f/π feet after n complete revolutions, what is the length in feet of the diameter of the bicycle wheel? A. f/nπ^2 B. π^2/fn C. nf/π^2 D. nf/π^2 E. f/n
August 15, 2014

math
thanks
August 15, 2014

math
Al is twice as old as Bill, who is twice as old as Carl. In 10 years, Al will be twice as old as Carl. How old is Al now? A. 40 B. 20 C. 10 D. 5
August 15, 2014

physics
A 75.00-g sample of an unknown metal is heated to 52.00°C. It is then placed in a coffee cup calorimeter filled with water. The calorimeter and the water inside have a combined mass of 225.0 g and an overall specific heat of 2.045 J/(gi°C). The initial temperature of ...
June 27, 2014

PHYSICS PLEASE HELP QUICKLY
I assume you are converting between ampere and coulomb/second.
May 8, 2014

PHYSICS PLEASE HELP QUICKLY
1 A = 1 C/s
May 8, 2014

Multiple Choice
2.) 1 A = 1 C/s Question 3.3) 20.7 so around 21 Question 4.4.) I think you need time as well to get this answer for equation V*I*t, but is not then its 24W (Not sure on that though) Question 5.5.) 220 V Question 6.6.) Hint: Voltage can be likened to pressure. Question 7.7) 2.6...
May 8, 2014

Steps in Chemistry
I'm assuming they are asking for a lab experiment process, if so then I think this is what they would want: -Purpose statement -Procedure statement -Data: Such as equations -Conclusion statement
May 8, 2014

English
American realism
May 8, 2014

Adam Help
Simply reduce Si2O4 by dividing both subscripts by 2. That will get you SiO2. Silicon dioxide is held together by double, covalent bonds. Si(s)+ 2O(g)=SiO2
May 8, 2014

Chemistry
2 K3PO4 (aq) + 3 MgCl2 (aq) → Mg3(PO4)2 (s) & 6 KCl (aq) Net Ionic 2(PO4)-3 (aq) + 3 Mg+2 (aq) → Mg3(PO4)2 (s)
May 8, 2014

Multiple Choice HELP!
Only bromine. You have to write electron configuration: [Br]:1s^22s^22p^63s^23p^63d^{10}4s^24p^5
May 8, 2014

Multiple Choice HELP!
Phosphorus has three electrons in its 3p sublevel
May 8, 2014

Physics
So "MathMate" you're saying that the equation I should use is the following: A) 1/2 * 400 #/in * 1.75"^2 = 612.5 lbs B) 1/2 * 600 #/in * 1.75"^2 = 918.75 lbs There is no subtraction between the two? for part b, I need the length of the spring not lbs...
May 8, 2014

physics
3813.75 Joules of work is being done on a 150 lb object while it is moved 75 ft across a horizontal plane, what is the final velocity if the coefficient of kinetic friction is 0.25 and the initial velocity is 1 ft / s?
May 7, 2014

science
dissecting microscope
May 7, 2014

english
What does plagiarize mean,by the way I'm in year 8 and I am 12
April 27, 2014

english
I need to make a alternative cover and blurb for the book skellig, I have already done the corve I am stuck on the blurb. Help!!
April 27, 2014

Biology please help
I have a project due tomorrow and i cant find a good place to start. Cardiacmuscle disease is a disease that is a result of the cytoskeleton not functioning properly. I cant find anything on cardiac muscle disease. THIS IS NOT CARDIOMYOPATHY
April 6, 2014

science
Im researching a disease caused by a cellular organelle that does not function properly. My topic is "cardiamuscle disease" and its organelle is the cytoskeleton. Ive searched google but cant seem to find a website to help me begin
April 6, 2014

health
Cosmetic surgery is more likely to lead to disappointment if a person is ________. A. Seeking surgery with the hope of influencing a change in oneself B. Seeking surgery with the hope of influencing a change in someone else C. Seeking surgery with the hope of influencing a ...
March 27, 2014

MBA
0.0125
March 25, 2014

math
thank you thank you thank you soooooooo much
March 20, 2014

math
so 7134 divided by 82 should be 7200 divided by 80
March 20, 2014

math
+i think i got it i should divide 4000 by 10 am i correct
March 20, 2014

math
i rounded 4312 to 4000 then i divided by 6 is that correct
March 20, 2014

math
666 and 87
March 20, 2014

math
estimate the value of a)4312 divided by 6 and b) 7134 divided by 82
March 20, 2014

Math
estimate 4825 x 63
March 20, 2014

math
how did you get 22,000
March 20, 2014

math
estimate the value of 3268 x 7
March 20, 2014

math
express 8 divided by 12 as a frction
March 20, 2014

math
Danny bought 6 packets of drink. Each packet contained 1/4 liter of drink. Find the total amount of drinks in liters.
March 19, 2014

statistics
Canadians are becoming more conscious of the importance of good nutrition, and some researchers believe that we may be altering our diets to include less red meat and more fruits and vegetables. To test this theory, a researcher decides to select hospital nutritional records ...
March 15, 2014

Physical Science
X-rays can take pictures of your bones but visible light cannot. Explain why. Homework question, please and thank you!
March 13, 2014

maths
I need 1 more Ms. Sue
March 9, 2014

maths
Thanks Ms. Sue!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
March 9, 2014

maths
What 4 fractions are the same as 2/9?
March 9, 2014

Math
an ice cream parlor is giving away free icecream sundaes on opening day. the sundaes are assembled randomly from 7 types of ice cream, 2 types of sauce, and 5 kinds of toppings. find the probabilty.
March 7, 2014

Math
If Mike spends 1/6 of his study time on his science test, and his study time is 2/3 of all of his time, then you divide 1/6 by 2/3 to find that Mike spent (1/6)*(3/2)=3/12=1/4 of his time on Tuesday studying for the science test.
February 22, 2014

Science
Some gardening books tell people to water their plants during the morning or the evening instead of during the sunniest , hottest part of the day . Why do you think books say this
February 11, 2014

Physics D
A 1500-kg car moving north at 27.0 m/s is struck by a 2165-kg car moving east at 13.0 m/s. The cars are stuck together. How fast and in what direction do they move immediately after the collision? 1. what is the degree north of east? 2. how was do they move after the collision...
February 3, 2014

Question help
I think this is C what you think?
January 21, 2014

US History
2. Explain how trusts, pools, holding companies, and communities of interest work to reduce competition and to introduce 'economies of scale.'
January 9, 2014

Physics
A car of mass 900.0 kg accelerates away from an intersection on a horizontal road. When the car speed is 49.7 km/hr (13.8 m/s), the net power which the engine supplies is 4300.0 W (in addition to the extra power required to make up for air resistance and friction). Calculate ...
January 2, 2014

English
Rewrite the sentences using nouns to replace the phrases in italics. Example: She writes books for a living. She is a writer. 1. Emma loves being a mother. .................................... 2. Having friends is the most important thing for Pepe...
November 27, 2013

Physical Science
3. Radioactive decay of nuclei often involves several decays before a stable nucleus is formed. This is called a decay chain. What stable isotope is formed when radon-222 undergoes a decay chain of four alpha decays followed by four beta decays? (A) tungsten-206 (B) platinum-...
November 20, 2013

Check my answers 6 ?s- Physics
All right besides Question 6) 21 N Question 7) 2,800 N
November 19, 2013

english
not sure what the difference between a simple subject, simple predicate, complete subject and a complete predicate are
November 11, 2013

Chemistry
For the following reaction, identify the substance oxidized, reduced and the oxidizing and reducing agents. 2SO2 + O2 ----> 2SO3
October 30, 2013

Physics
An airplane at 410 miles per hour at 40 degrees east of south is blown off course by a wind of 50 miles per hour at 25 degrees east of south. Find the resultant speed of the airplane.
October 21, 2013

Physics
Use the equation for acceleration to determine the acceleration for the following motion. Time(s) 0 1 2 3 4 Velocity(m/s) 0 2 4 6 8
October 18, 2013

Chemistry Plz Help
Calculate the correct boiling point for nitrobenzene. Assume that a total immersion thermometer was used. The obs. boiling point was 205 degree celsius. The reflux ring in the test tube just reached up to the 0 degree celsius mark on the thermometer. A second thermometer ...
September 26, 2013

Chemistry
If aqueous hydrofluoric acid is reacted with sodium hydroxide, which of the following substances are in the net ionic equation? 1. hydrofluoric acid, hydroxide ion, hydronium ion, fluoride ion, and water 2. hydrofluoric acid, sodium ion, hydroxide ion, ...
September 22, 2013

Physics
A golfer takes two putts to get his ball into the hole once he is on the green. The first putt displaces the ball 9.6 m east, and the second 2.59 m south. What displacement would have been needed to get the ball into the hole on the first putt? Answer in units of m...
September 17, 2013

Physics
Janet jumps off a high diving platform with a horizontal velocity of 2.23 m/s and lands in the water 1.7 s later. How high is the platform? The acceleration of gravity is 9.8 m/s 2 . Answer in units of m
September 17, 2013

English
I'm embarrassed I can't figure this out on my own but I can't so here I am. I was giving these words and told to put them in " Letter by Letter Alphabetization " I'm confused by this and don't know how to figure out which word goes first and why. ...
September 15, 2013

chemistry
What is the empirical formula of a compound that is 14 g calcium, 11 g oxygen, and 0.7 g hydrogen? A. CaO2H B. Ca2OH2 C. CaOH D. Ca(OH)2
August 15, 2013

chemistry question
What mass of propane (C3H8) is needed to produce 346 g carbon dioxide in the following reaction? C3H8(g) + 5O2(g) -> 3CO2(g) + 4H2O(g) A. 346 g C3H8 B. 115 g C3H8 C. 5075 g C3H8 D. 1.86 g C3H8
August 15, 2013

Chemistry
You need to prepare 100.0 mL of a pH=4.00 buffer solution using 0.100 M benzoic acid (pKa = 4.20) and 0.180 M sodium benzoate How much of each solution should be mixed to prepare this buffer?
August 13, 2013

help please
what is the answer
July 4, 2013

help please
so what is the question, becacuse, when someone else was asking you before you said A is wrong and you think its B
July 4, 2013

chemistry
How many mL of 0.109 M Na2CO3 would be needed to precipitate all of the copper ions in 26.7 mL of 0.159 M CuSO4?
June 28, 2013

Boolean expression Help asap PLEASE
A control system is needed to alert an attendant for the following situation. Which of the following is the Boolean equation expressing the electronics you would need? Either the tank is filled and the pump is on, or the tank is empty. (Use A = tank filled, B = pump on, X = ...
June 19, 2013

Boolean expression Help asap PLEASE
Thinking in terms of a gate, how would you keep open a two-input AND gate? In other words, what should one of the lines be held at to allow the other signal line to propagate through?
June 19, 2013

Boolean expression Help asap PLEASE
Thinking in terms of a gate, how would you keep open a two-input OR gate? In other words, what should one of the lines be held at to allow the other signal line to propagate through?
June 19, 2013

microprocessors
The value 000001112 is sent to Port B of an Eblock system where an LED module is connected. Which LEDs are on?
June 19, 2013

modules
What are some of the safety considerations when installing or maintaining PLCs? What is a proper grounding?
June 18, 2013

modules
For what control problems do we need to use analog modules or HMI devices
June 18, 2013

power dissipation please help
A diode carries 20 mA with a 2.0 V forward voltage drop. What is the power dissipation?
June 10, 2013

transformers
A resistive load of 2 k is connected across the secondary windings of a 25:1 transformer. If the primary voltage is 50 V AC, what will be the secondary current? im getting 2mA but the correct answer is 1 mA please help
June 10, 2013

Amplifiers
An op amp has a maximum output voltage swing of 10 Vpp and a voltage gain of 100. What is the largest peak to peak input signal that can be applied to the input without clipping the output signal?
June 10, 2013

Amplifiers
Thank you for your help
June 10, 2013

Amplifiers
A common collector amplifier without a bypass capacitor has RE = 1.5 kohms and RC = 2.1 k ohms and r'e = 17 ohms. The voltage gain is approximately
June 10, 2013

physics Elena please verify
If the resistance between the center and the outer terminal on a 20 k ohm potentiometer reads 12 k ohms, the resistance between the center terminal and the other outer terminal is i have 12kohms
May 31, 2013

Phyics help please varify the answer is correct
thank you
May 31, 2013

Phyics help please varify the answer is correct
A parallel circuit has value of RT = R1 // R2 // R3. If one resistor opens, RT RT increases?
May 31, 2013

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