Total # Posts: 307
Could you pls check this time line 1, king George issues Proclamation of 1763 2, stamp act 3. Sons of Liberty 4. Boston Massacre 5. Boston Tea Party 6, coersive acts 7, 1st continental congress 8. 2nd continental congree 9. First sho of American revolution 10. Bunker hill ...
September 24, 2016
When you mixand separate CaCO3 and SiO2 with acetic acid-vinegar, it is a chemical reaction. It bubbles and CO2 is produced. What property of CaCO3 causes this to happen? Could you explain this to me pls. I am guessing the acetic acid reacts with one of the acetic acid, but ...
September 21, 2016
A cash register contains only ten dollar and fifty dollar bills. It contains three times as many ten dollar bills as fifty dollar bills and the total amount of money in the cash register is $2,080. How many ten dollar bills are in the cash register?
September 11, 2016
math or chemistry
5.4 x10^-2 by 2.5 x10^-3 by 7.9 x10^-3m volume = 106.65 x10-8m^3 Check pls yesterday you said 106.65 x10^-6. If you add 2+3+3 you get 8 is that right? Just want to make sure I'm doing it right. Thank you. I may have witten it differently.
September 10, 2016
three fireworks are fired at the same time. The first one is fired every 64 seconds, the second one is fired every 84 seconds and the third one is fired every 96 seconds. How many seconds after they start will it take until all three fireworks are again fired together?
September 9, 2016
Confused, conflicting texts when you are finding % error for density formula: experienced value-accepted value/ accepted value ×100. Does the ×100 cancel out the percent sign? EX; 7.28g/mL-6.54g/mL/6.54g/mL ×100. Is the answer 11.31 or 11.31% The lab video ...
September 7, 2016
What particle is needed to complete this equation 14/7N+ _______=14/7C+ 1/1H I think it is a beta particle because of beta decay and transmutation. I could be really off because this chapter is really confusing me.
May 30, 2016
If I have a sample from doing a half lfe lab with m&ms, not timed, just pulling out decayed or m&ms with rhe m on top, how do I calculate the half life using t1/2=(.693)/k formula. Do I have to do this 9 times as it took 9 trys to use up all the m&ms. I am not really sure what...
May 29, 2016
I know what the domino threty is. Question is, What 3 aspects of foreign policy do we see the domino theory reflected? I assume they are talking from 60's to 70's. I don't like to submit w/o an answer, but if someone could help, I'd be extremely appreciative. ...
May 18, 2016
geometry and trig
If a cylinder with a 4 inch diameter and a 6 inch height holds 1 pound of oatmeal. How much oatmeal will a cylinder (similar) with a 10 inch diameter hold? Volume of 4 in-----24pi volume of 10 in----137pi I get 91 oz choiced are37,44,74, 192
May 10, 2016
1. What is the prepositional phrase in the sentence: The family drove to the store. a. the family drove b. drove to the store c. the family d. to the store *** 2. What is the appositive phrase in this sentence: My mother, Rebecca, loves to eat pumpkin pie. a. Rebecca *** b. my...
May 3, 2016
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