Total # Posts: 285
7 is the hypotenuse. 4 and 6 are either opposite to or adjacent to angle A. Tangent is opposite/adjacent. Use 4 and 7 to fill in opposite/ adjacent depending on their location.
April 29, 2016
One more, confused How can you tell by the periodic chart which ions of metals are most easily reduced or oxidized. A website or video would be fine. I know it is quite involved. thanks again
April 29, 2016
Dr Bob Could you check this please? Voltaic cell---cathode is positive, accepts electrons, reduced, anode is negative, gives up electrons and is oxidized Electrolytic cell------cathode is negative, accepts electrons and is reduced. Anode is positive, givesup electrons and is ...
April 29, 2016
A 110g piece of copper is heated and the temperature changes from 38C to 172C. The heat absorbed is 686 cal. What is the specific heat of copper. I think the answer is .385, but I have tried 100 different ways to get this answer or anything close, and I am lost..it is just a ...
April 17, 2016
Calculate the energy needed to produce 10 moles of Cl2O7 using this balanced equation. 2Cl +70+ 100kCal==2ClO7 please explain steps if I needed to calculate for 7 moles, how would it change?
April 16, 2016
A student cuts 1/3 of a coil of wire. He then cuts out another piece that was 8 meters long (I assume from the remaining coil). The two pieces of cut off wire are only half the total length of the wire. How long was the coil before the student cut it? I am getting 25, 50, to ...
April 14, 2016
What is anything that has mass and takes up space? 1) Weight 2) Volume 3) Density 4) Matter When you measure the boiling point of mercury, you are investigating a ____. 1) Chemical change 2) Chemical property 3) Physical change 4) Physical property Ab object weighing 90 N has ...
April 6, 2016
geometry and trig
I have a regular octagon with a radius of 9. I have split the 8 pie slices into right angles--leaving angles 90, 67.5, and 22.5. I looked for the sine of 22.5 opp/hyp and get .38. Then the oppositeside is 6.84. I can't get the right answer, what am I doing wrong? Thanks
March 30, 2016
Ould you please offer me some insight to this, Calculate the hydrogen ion concentration (H+) for the aqueous solution in which (OH-) is1×10-15 mol/L. Is this solution acidic, basic or neutral? Thanks in advance
March 20, 2016
Dr Bob, Thanks for your help. Ihad googled for 3 hours before asking you. For future reference, if anyone asks this question again, 10th grade chemistry, I found a video on You Tube that makes it easy to understand. It is, The Sci Guys, Ph indicator, acid-base indicator. ...
March 5, 2016
In the red cabbage lab, we just took the cabbage juice and in 5 separate cups mixed it with 5 different liquids, ex: coke, milk, cleaning agent, etc, and matched the color to a ph chart to tell if it was a base or an acid. Simple lab. The question needs a relatively simple ...
March 5, 2016
Explain the chemical changes that occur in the red cabbage lab that changes the color of the cabbage juice. I know it has something to do with the hydrogen ions and maybe something to do with the electrons, but I don't understand what or how to answer this question
March 4, 2016
I looked it up and it says become is ALWAYS a linking verb. It seems confusing because you would expect a linking verb to link 2 verbs as in: has become, had jumped, and became is alone. It is not has become.
November 11, 2015
AP 1 Physics
A motorcycle has a constant speed of 25.0 m/s as it passes over the top of a hill whose radius of curvature is 144 m. The mass of the motorcycle and driver is 326 kg. Find the magnitudes of the following. Centripetal force: mv^2/r = 1414.93 N Normal force: ?? I tried N = mg...
November 3, 2015
Suppose that Paulie and Vinny each can produce ice cream or t-shirts. it shows the quantity of each good that Paulie and Vinny each can produce in one hour, respectively, if they devote all of their time and effort into making the good. paulie can make 3 ice cream (cups) ...
September 20, 2015
POL 201 History
Under the "necessary and proper" clause, Congress may? A. Do as it pleases B. Not do anything unless it has been enumerated C. Do that which is necessary to exercise its enumerated powers D. do that which is necessary even if it violates the basic tenets of the ...
June 28, 2015
In Cooperative Federalism A. relations between the states and national government are characterized as hostile. B. there is a strict separation between the states and the national government. c. relations between the states and national government are characterized by ...
June 28, 2015
Created a nutritional care plan for the client. Included an evaluation of nutritional risk, listing of interventions, and expected outcomes. Listed the goals of medical nutrition therapy for the patient and suggested an appropriate diet. Identified whether the patient/client ...
May 14, 2015
Then took the other, as just as fair, And having perhaps the better claim, Because it was grassy and wanted wear; Though as for that the passing there Had worn them really about the same,
March 21, 2015
Identify at least two actions of the leader yongle that benefited or protected the people. Please help me or give me a website that will help me I am in a rush I only have until 7:00
January 28, 2015
Your muffler factory claims to manufacture mufflers with a lifespan of more than 10000 miles of usage. A consumer group tests this claim at the 95 percent significance level, and finds that a sample of 64 mufflers have a mean lifespan of 10002 miles, with a standard deviation ...
August 23, 2014
geometry help!! answer all questions!! please
1) Write the translation that maps P(-4, 2) onto the point P ' (-1, -1)? 2) What are the coordinates of the reflection of the point (5,1) over the line y = x? 3) The coordinate notation for reflection over the y-axis is -?-. 4) If a translation has a coordinate notation of...
July 31, 2014
Kyle got in his car and started driving toward his grandmother's house. After driving for 1 hour and 47 minutes, Kyle took a break for 31 minutes to have a snack. Then Kyle drove 43 minutes and finally arrived at his grandmother's house at 4:12 P.M. What time did Kyle ...
May 1, 2014
I did this lab and all you have to do is use the numbers and answers in the video. I have a hard time understanding it, but maybe we both need a live lesson. The book does not explain things very well. if you use the numbers in the video, and have to change the molar mass, you...
March 20, 2014
David drew a scale drawing of a table.The real table is 12 feet long.I measured out in inches that the height was 1/2 and the length was 2.But my question is What scale did he use?
February 11, 2014
stop telling ms.sue to stop giving links she is trying to help OK and she gave good info and what someone said that the teachers give out the answer out that's not true you have to figured out.
December 19, 2013
An oceanic depth-sounding vessel surveys the ocean bottom with ultrasonic waves that travel 1530 m/s in seawater. How deep in meters is the water directly below the vessel if the time delay of the echo to the ocean floor and back is 6.8 s?
September 11, 2013
Molly Ellen, bookkeeper for Keystone Company, forgot to send in the payroll taxes due on April 18. She sent the payment November 8. The IRS sent her a penalty charge of 8% simple interest on the unpaid taxes of $5,900. Calculate the penalty. (Remember that the government uses...
June 22, 2013
As of May 17th 1213, the price of cobalt metal on the London Metal Exchange was $27500 per metric ton. One metric ton is defined as 1000Kg. Determine the price of cobalt in cents per atom.
May 26, 2013
7th Grade Social Studies
1)B 2)D 3)B 4)A 5)C 6)C 7)B 8)A 9)D 10)C I took it then saw That on the 1st person who answered got numbers,7,8 and 10 wrong. I wanted to make sure that this got fixed so hear are the answers. You are going to get 100% by using these answers I promise.
March 30, 2013
harriet and harry got jobs at the bumblo gum factory as bubblegum testers. for every bubble they blow they get 50 cents. harriet blows 100 bubbles and harry blows 150 bubbles. harry says, "wow! between the two of us, we've only made 12.50 today!" what was henrys ...
March 20, 2013
algebra/ word problem
Justin paddles his kayak 6 miles upstream in 1,5 hours. he turns around and paddles downstream, the same distance, in only 1 hour. What is the rate in still water and what is the rate of the water's current
January 9, 2013
I'm studying to take a math placement exam and it has been a long time since I've taken a math class. Can someone please give me a step to step solution of these: A.Simplify: 8x/[2^(x-1)] Answer = 2^(2x+1) B.Simplify: (2^x)*[4^(x-1)] Answer = 2^(3x-2)
December 25, 2012
An electron gun is a device that sets up an electric field between two plates. The electrons start on the negative plate and thenare accelerated toward the positive plate and out a small hole in its middle if an electron in the gun feels the effect of 5.00x10^5 N/C. What is ...
December 20, 2012
Given the function f(x) = x^3+ 3x a. Find the rate of change between the two stated values for x: 1 to 2 b. Find the equation of a secant line containing the given points: (1, f(1)) and (2, f(2))
November 8, 2012