Y0gi

Most popular questions and responses by Y0gi
1. Physics

When four people with a combined mass of 320 kg sit down in a car, they find that the car drops 0.80 cm lower on its springs. Then they get out of the car and bounce it up and down. What is the frequency of the car's vibration if its mass (when it is

2. Physics

A weather ballon is designed to expand to a maximum radius of 20 m at its working altitude, where the air pressure is 0.030 atm and the temperature is 200 K. If the ballon is filled at atmospheric pressure and 300 K, what is its radius at liftoff?

3. Physics

25) A 75-g ice cube at 0 C is placed in 825g of water at 25 C. a) What is the final temperature of the mixture? b) If the final temperature is 0 C, then how much ice remains? c) change the ice's mass to 300g, and repeat the problem

4. Physics

25) A 75-g ice cube at 0 C is placed in 825g of water at 25 C. a) What is the final temperature of the mixture? b) If the final temperature is 0 C, then how much ice remains? c) change the ice's mass to 300g, and repeat the problem I don't know how to work

5. Physics

55) A 200-g block of copper at a temperature of 90 C is dropped into 400g of water at 27 C. The water is contained in a 300-g glass container. What is the final temperature of the mixture?

6. Physics

A weather ballon is designed to expand to a maximum radius of 20 m at its working altitude, where the air pressure is 0.030 atm and the temperature is 200 K. If the ballon is filled at atmospheric pressure and 300 K, what is its radius at liftoff?

7. Physics

19) A 100-g aluminum calorimeter contains 250g of water. The two substances are in thermal equilibrium at 10 C. Two metallic blocks are placed in the water. One is a 50-g piece of copper at 80 C. The other sample has a mass of 70g and is originally at a

8. Physics

60) A class of 10 students taking an exam has a power output per student of about 200W. Assume the initial temperature of the room is 20 C and that its dimensions are 6.0 m by 15.0 m by 3.0 m. What is the temperature of the room at the end of 1.0 h if all

9. Physics

A glass windowpane in a home is 0.62 cm thick and has dimensions 1.0 m x 2.0 m. On a certain day, the indoor temperature is 25 C and the outdoor temperature is 0 C. a) What is the rate at which energy is transferred by heat through the glass? b) How much

10. College Algebra

Write each of the following as a single logarithm: 8) ((5-log x)/4) + 4log y =

11. College Algebra

Give the real solution set for each of the following: 42) log(6)(x^2+11) + log(6)x = 1 + log (6)(x^2+1)

12. College Algebra

Give the rational number that is the exact value for each of the following: 14) Log(9)((∛(3)/(ã(27))=

13. College Algebra

Write each of the following as a single logarithm (log (x+3))/(3) = 1

1. Physics

I did as you said. The only thing I did not see you add to the equation though is the initial temperature of the room. I don't know if I did it right because after your instructions I just added that 20 C to the final answer and it gave me 44.5! I don't

posted on November 30, 2010
2. Physics

How do you find the final temperature of the mixture though?

posted on November 30, 2010
3. Physics

Yes that is what I meant. Thank you, I figured it out.

posted on November 30, 2010
4. Physics

so it's just Heat(cold)=Heat(hot)?

posted on November 30, 2010
5. Physics

Calculating Final temperature. I was absent one day from class and didn't get the notes. So I am confused and this Hw is due in less than an hour!

posted on November 30, 2010
6. Physics

Yes I know but I am confused on how to separate T(final) out of the equation. I can arrange it fine but don't know how to solve for T(Final)

posted on November 30, 2010
7. Physics

Oh ok sweetness! Thanks. Figured out the answer. That makes sence. The only thing I had seen wrong with the equation you put is that you would need to find the volume, which is (4/3)ðr^3 not jut r^3. But still helped out so thanks =)

posted on November 18, 2010
8. math

X/Y -2/12 -1/7 0/2 1/-3 2/8

posted on November 18, 2010
9. Math

First you need to distribute. Then you will have 12a + 14 = 38 Then u subtract 14 from both sides. 12a = 24. Then divide both sides by 12. a = 2

posted on November 18, 2010
10. Math

Yea what mayah said. If you are combining "like terms"

posted on November 16, 2010
11. math

Yes that is correct!

posted on November 16, 2010
12. math

Or you could just do the Algebra. A=lw would be A=(cm)(cm) = cm^2 or A=(m)(m) = m^2 if you had the dimensions be 2 times the first one it would be 4 times as big, since it was squared. 3 would be 9 times, 4 would be 16 times, and so on.

posted on November 16, 2010
13. math

let's take a rectangle for example. It has a width of 2 and a lengh of 3. You just take A=lw so the are is (2)(3)= 6 The one that is three times the other is 2(3) and 3(3) or 6 x 9 = 45. It is 9 times bigger. 45/6 = 9

posted on November 16, 2010
14. Math

What are you solving for? Are you solving for (y) or (x) or are you just combining "like" terms?

posted on November 16, 2010
15. Math

Meant you need to convert the percent into a decimal =P Lol

posted on November 16, 2010
16. Math

If you want 28% of 48 you just take the percentage and multiply by the number you want. The percantage is 28% but you need to convert it to a fraction. 28/100 = .28 So then you multiply (.28)(48) = 13.44 So 28% of 48 = 13.44 =)

posted on November 16, 2010
17. math

yes that is correct. 1 m = 100cm so A = 100 cm x 100 xm A = 10000 cm^2 Good job!

posted on November 16, 2010
18. math

Does the question ask for it to be in cm or m? If it is supposed to be in cm then the answer is A = 50 cm x 20 cm if it is supposed to be in m then the answer is A = .5m x .2m

posted on November 16, 2010
19. College Algebra

I meant give the real solution set for the problem above

posted on November 16, 2010
20. math

Does it have to be 3 different numbers or the same one? The number 8 fits into all 3 equations. If not then you can do the math. Take the first equation which is 5 + x < 15 subtract 5 from both sides. Then the equation is x < 10 so you could take any

posted on November 15, 2010
21. math

Yes it would make it true. It is saying 19 - 8 is less than 12. So then you can simply do the math, and you come out with 11 is less than 12. Which is a true statement. 19 - 8 < 12 11 < 12

posted on November 15, 2010
22. math

If the line is going to be horizontal then it must cross the y - axis. To find out where it crosses, you have to look at the y-coordinate of the point (2,4). The y-coordinate is 4 so your equation for the horizontal line would be y = 4

posted on November 15, 2010