Posts by dalton

Total # Posts: 114

1. Chemistry II - Concentrations

At 30.°C, the concentration of hydronium (H3O^+) ions in an aqueous solution is 1.1???10^?9 M. (Note: At 30.°C, the ion-product constant for water is 1.46???10^?14.) (a) What is the concentration of hydroxide (OH^?) ions in this solution? (b)is the solution acidic, ...
2. Physics

The radius of curvature of a loop-the-loop for a roller coaster is 11.8 m. At the top of the loop (with the car inside the loop), the force that the seat exerts on a passenger of mass m is 0.80mg. Find the speed of the roller coaster at the top of the loop.
3. Physics

Small, slowly moving spherical particles experience a drag force given by Stokes' law: Fd = 6??rv where r is the radius of the particle, v is its speed, and ? is the coefficient of viscosity of the fluid medium. (a) Estimate the terminal speed of a spherical pollution ...
4. Languge Arts

I just don't understand on why to write and I have no idea what to do.
5. Science

How fast would a 20gram marble have to go to travel 9.5 inches. (Flat surface)
6. Spanish

Instructions: Modifique el párrafo por cambiar las palabras entre comillas al tiempo FUTURO. Modelo: Mi familia ‘va a visitar’ a nuestros abuelos este verano. Mi familia visitará a nuestros abuelos este verano. 1. Este año ‘vamos a hacer&#...
7. Spanish

Instructions: Modifique el párrafo por cambiar las palabras entre comillas al tiempo FUTURO. Modelo: Mi familia ‘va a visitar’ a nuestros abuelos este verano. Mi familia visitará a nuestros abuelos este verano. 1. Este año ‘vamos a hacer&#...

take
9. Math

The tortoise can walk 3/5 of a mile in 1/2 of an hour. How many miles can he walk in 1 hour?
10. Chemistry

I figured it out...it's 1.79 x 10^4
11. Chemistry

The overall cell reaction occurring in an alkaline battery is: Zn(s) + MnO2(s) + H2O(l) ---> ZnO(s) + Mn(OH)2(s) a) How many moles of electrons flow per mole of reaction?...answer: 2. Mol e-Note: b) If 6.09g of zinc is oxidized, how many grams of manganese dioxide and of ...
12. Biology

It's Pretty Simple if you think about it, when it comes to DNA strands it just are its opposites, so it would be T=A A=T C=G G=C However when itis mRNA strands the A=T Turns into A=U so if this was a DNA it would look like A-A-G-C-G-A-C-T-T but as a mRNA strand it becomes ...
13. Biology

I's Pretty Simple if you think about it, when it comes to DNA strands it just are its oppsoites, so it would be T=A A=T C=G G=C However when itis mRNA strands the A=T Turns into A=U so if this was a DNA it would look like A-A-G-C-G-A-C-T-T but as a mRNA strand it becomes A...
14. chemistry

A voltaic cell consists of a standard hydrogen electrode in one half-cell and a Cu/Cu2+ half-cell. Calculate [Cu2+] when E cell is 0.070 V. NOTE::::::::::::::::::::ANSWER IN SCTIENTIFIC NOTATION PLEASE!!! thank you!
15. Spanish

1.Yo voy a usar 2. Pude
16. Spanish

quieras. gane. puedan.

nos dan.
18. chemistry Dr BOB

In many residential water systems, the aqueous Fe3+ concentration is high enough to stain sinks and turn drinking water light brown. The iron content is analyzed by first reducing the Fe3+ to Fe2+ and then titrating with MnO4- in acidic solution. Fe2+(aq) + MnO4-(aq) ? Mn2+(aq...
19. Chemistry Dr. BOB

Sorry....I wrote it so many times on accident.
20. Chemistry Dr. BOB

In many residential water systems, the aqueous Fe3+ concentration is high enough to stain sinks and turn drinking water light brown. The iron content is analyzed by first reducing the Fe3+ to Fe2+ and then titrating with MnO4- in acidic solution. Fe2+(aq) + MnO4-(aq) ? Mn2+(aq...
21. chemistry

In many residential water systems, the aqueous Fe3+ concentration is high enough to stain sinks and turn drinking water light brown. The iron content is analyzed by first reducing the Fe3+ to Fe2+ and then titrating with MnO4- in acidic solution. Fe2+(aq) + MnO4-(aq) ? Mn2+(...
22. chemistry

Styrene is produced by catalytic dehydrogenation of ethyl- benzene at high temperature in the presence of superheated steam. (a) Find ÄH°rxn, ÄG °rxn, and ÄS °rxn, given these data at 298 K: (b) At what temperature is the reaction spontaneous? What ...
23. chemistry

Styrene is produced by catalytic dehydrogenation of ethyl- benzene at high temperature in the presence of superheated steam. (a) Find ÄH°rxn, ÄG °rxn, and ÄS °rxn, given these data at 298 K: (b) At what temperature is the reaction spontaneous? What ...
24. chemistry

Styrene is produced by catalytic dehydrogenation of ethyl- benzene at high temperature in the presence of superheated steam. (a) Find ÄH°rxn, ÄG °rxn, and ÄS °rxn, given these data at 298 K: (b) At what temperature is the reaction spontaneous? What ...
25. chemistry

Styrene is produced by catalytic dehydrogenation of ethyl- benzene at high temperature in the presence of superheated steam. (a) Find ÄH°rxn, ÄG °rxn, and ÄS °rxn, given these data at 298 K: (b) At what temperature is the reaction spontaneous? What ...
26. Chemistry

data: Given the following data, what is the delta Hrxn, delta Grxn and delta Srxn at 298 K. Ethylbenzene, C6H5--CH2CH3 : delta Ht = -12.5 kJ/mol, delta Gt = 119.7 kJ/mol and S = 255 J/mol*K Styrene, C6H5--CH==CH2 : delta Ht = 103.8 kJ/mol, delta Gt = 202.5 kJ/mol and S = 238 J...
27. Chemistry

Styrene is produced by catalytic dehydrogenation of ethyl- benzene at high temperature in the presence of superheated steam. (a) Find ÄH°rxn, ÄG °rxn, and ÄS °rxn, given these data at 298 K: (b) At what temperature is the reaction spontaneous? What ...
28. math

A heated piece of metal cools according to the function c(x) = (.5)x − 11, where x is measured in hours. A device is added that aids in cooling according to the function h(x) = −x − 3. What will be the temperature of the metal after five hours?

smoke weed
30. pre algebra

IN the question 20-2.7+1+(3)+10 am I right when I PEMDAS 20-14+4+10= 20-28=-8?
31. Health

When does body image typically become a concern for boys? A. When playing with friends in the neighborhood B. When they struggle with body changes C. When they fail a test at school D. All of the above I pick B. but I really don`t know?

Thanks!!!
33. Health

What are common symptoms of stress? A. Short temper B. Low morale C. Headaches D. All of the above I pick D. All the above

Thanks
35. Health

What can spark weight concerns for girls and impact their eating habits in potentially unhealthy ways? A. High self-esteem B. Maintaining a healthy weight C. Peer pressure to look a certain way D. Positive reinforcement from parents about how one looks I pick C. don`t want to ...
36. Health

The National Weight Control Registry found in their research that those who had maintained a significant weight loss reported improvements in ________. A. Physical health and energy levels only B. Stress reduction and general health C. Physical health, energy levels, general ...

Thanks
38. Health

What are eating disorders? A. An illness that causes little disturbance to a person’s everyday diet B. An illness that causes serious disturbances to a person’s everyday diet C. An illness that leads to starvation D. An illness that leads to binging I want to put B. ...
39. Health

Thanks for all yalls help and I did read it that`s why I got B. as my answer. Thanks again.

B?
41. Health

Is it B or C because I don`t think its D?
42. Health

Sorry Mr.Reed. And thanks to both of you.:)
43. Health

For adults, which ranges below reflect an accurate BMI category? A. If your BMI is less than 18.5, it falls within the obese category B. If your BMI is 18.5-24.9, it falls within the normal or healthy weight category C. If your BMI is 25-29.9, it falls within the underweight ...
44. Health

thanks!!!!!!!!!!
45. Health

________ physical activity and ________ time spent in sedentary behaviors. A. Increase; increase B. Reduce; increase C. Increase; reduce D. Reduce; reduce I got C.
46. Health

It just has a list of foods and their groups.
47. Health

PLZZZ Help!!!!!
48. Health

Examples of foods with empty calories include: A. Lima Beans B. Broccoli C. Sweetened applesauce D. Watermelon I say D. or B.?
49. Health

Thank you so much.
50. Health

It talks about overweight and underweight but there is two answers for that A or C? I`m not trying to guess cause I want help.if you know what i`m saying?

Guessing C.
52. Health

The U.S. government categorizes body weight status as ________. A. Underweight, healthy weight, overweight, obese B. Healthy, unhealthy C. Underweight, healthy, overweight D. Thin, healthy, heavy, obese
53. Health

I did thanks again.

thanks
55. Health

I was thinking B. but i don`t want the wrong answer.
56. Health

In striving to meet the 2010 Dietary Guidelines for Americans, one should consume fewer foods with ________. A. Added sugars B. Trans fats C. Sodium D. All of the above i got B?
57. Health

i tried the link and i got B thanks.
58. Health

it just says frequently.
59. Health

Healthy pregnant and postpartum women should get at least ________ of moderate-intensity aerobic activity a week. A. 200 minutes B. 150 minutes C. 60 minutes D. 30 minutes I got D.
60. Art

I got B to if wrong than C.
61. health

Thank you so much i will defiantly be coming back for help.
62. health

I`m guessing B. Stroke but I don`t want to get it wrong.
63. health

A. Leukemia B. Stroke C. Alzheimer’s disease D. High self-esteem

65. art history

Which of Michelangelo's sculptures is a metaphor for courage, determination, and strength?
66. physics

A bookshelf is at rest in a room. A force of 35.0 newtons is applied to a bookshelf. If the floor imparts a frictional force of 2.90 newtons, what is the net force acting on the bookshelf? 37.9 newtons 32.1 newtons 33.1 newtons 35.0 newtons 50.5 newtons
67. geometry

A company packages it's cereal in a rectangular prism that is 2.5 inches by 7 inches by 12 inches. It is considering packaging it in a cylinder- shaped container having a 6 inch diameter and a height of 7.5 inches. Which used the least amount of packaging? Prove your answer.
68. physics HELP

Consider a coaxial cable with 2Amps in the center conductor coming out of the page, and 1Amp in the outer conductor going into the page. The center conductor has a radius of 1mm, the outer conductor's inner radius is 2mm, and the outer conductor's outter radius is 3mm...
69. physics HELP

A long, ideal solenoid has a diameter d=12cm and n=1200turns/meter carrying current I=20A. If the current is lowered at 4.33amp/s to zero, what is the magnitude of the induced electric field in V/m at a position 8.2cm from the solenoid's axis (so at a point outside the ...
70. physics

A long, ideal solenoid has a diameter d=12cm and n=1200turns/meter carrying current I=20A. If the current is lowered at 4.33amp/s to zero, what is the magnitude of the induced electric field in V/m at a position 8.2cm from the solenoid's axis (so at a point outside the ...
71. physics

not sure how to get i
72. physics

100turns of insulated wire are wraped around a wooden cylindrical core of cross-sectional area 12cm2. The two ends of the wire are connected to a resistor. The total circuit resistance is 13Ω. If an externally applied uniform magnetic field along the core changes from 1....

2 5
74. Physical science

20 m/s downward
75. Physical science

A rock is dropped from a height of 60 m and is in free fall. What is the velocity of the rock as it reaches the ground 3.5 seconds later?
76. English 3

The subject of "Game" can best be described as: a. survival of the fittest b. the dehumanization of humans c. the profound childishness of adults d. the need for discipline in the armed forces I picked a
77. Physics

240 cm

Jake ate 1/6 of the cookies. If he ate 5 cookies, How many cookies were there in all?
79. Social Studies

what is one freedom that American democracy has today that was clearly not recognized in the Roman Empire
80. calculus

the edges of a cube are increasing at the rate of 5 in/min. How fast is the volume changing when each side is 4 in.
81. College Algebra

What do I do to graph: (x-2)^2+(y-4)^2=9
82. Math

1. Which is equal to (square root 5)^3? a. 5^3/2 b. 5^2/3 c. 5^1/3 d. 5^1/6
83. Calculus

A particle travels along the x-axis so that its velocity is given by v(t)=cos3x for 0<(or equal to)t<(or equal to)5. When t=0, the particle is at x=5. a. What is the smallest x-coordinate of the particle? b. What is the total distance traveled? c. At what t is the ...

I think you should put homework list, joke list, and even booty list

That was a little rude and sarcastic...
86. pre algebra with pizzazz 239

3x-y=4 x=4y-17 3(4y-17)-y=4 12y-51=4 11y=55 y=5 x=4(5)-17 x=20-17 x=3 Answer-(3,5)
87. Math

what would be a set of 12 numbers that have the landmarks: maximum 8 range 6 mode 6 median 5
88. algebra

I came up with 9 1/3.
89. algebra

what is 2/7(4M-18)=12
90. math

o my gosh!! i see. that was easy. thank you so much.
91. math

i keep thinking of 5 in the ones digit and the tens digit can either be a 10 or 20 but that cant be because its more than 25 and less than 35. it has to be easy and im not getting it.
92. math

i don't understand?
93. math

my ones digit is 5 more than my tens digit. i am greater than 25 and less than 35
94. Chemistryy

Identify the observations of Ernest Rutherford's experiment with the gold foil. Where he experimented on alpha particles and deflection. Check all that apply.... 1) a positive charge is spread equally over the atom 2) THE MAJORity of the space inside the atom is empty ...
95. Math Pre Algerbra

Use Operations to figure out how to get to your answer.(PEMDAS) P-parenthesis E- exponents M-multiplication D-division A-addition S-subtraction The order to solving!
96. trig

a plane with airspeed of 450 miles per hour is flying in the direction N35 degress west?
97. english

a 2 page eassy a a time when someone halped you or you helped someone.
98. geometry

if x, x+3 and y are the lenghts of the sides of a triangle then _<y<_
99. physics

A driver in a car traveling at a speed of 59 mi/h sees a deer 104 m away on the road. Calculate the minimum constant acceler- ation that is necessary for the car to stop without hitting the deer (assuming that the deer does not move in the meantime). Answer in units of m/s2.
100. health

can a person be infected with HIV but not exhibit AIDS?
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