Recent content by mustang

Homework Statement 22. Divide the expression before differentiating. F(x) = (8x^3 - 1)/ (2x - 1) Homework Equations F'(x) = An^(x-1) The Attempt at a Solution F(x) = [(8x^3) / (2x - 1)] - [(1)/(2x - 1)] = [(4x^2)/(1)] - [(1) / (2x - 1)] = (4x^2) - (2x-1)^-1 F'(x) = (8x...

Problem 2. Liquid nitrogen, which has a boiling point of 77 K, is commonly used to cool substances to low temperatures. How much energy must be removed from 1.4 kg of gaseous nitrogen at 77 K for it to completely liquefy? Assume the latent heat of liquid nitrogen is 2.01 *10^5 J/kg Answer...

Just these two problems ! I'll be done. :) Problem 12. Given: specific heat of water = 4186 J/kg degrees Ceicuis and water's latent heat of fusion = 3.33 *10^5 J/kg. A 0.012 kg cube of ice at 0.0degrees Ceicuis is added to 0.459 kg of soup at 80.4degrees Ceicuis. Assuming that the soup...

I have solved all of my problems for my homework except for 12 and 13. Where I am clueless. Need step-by-step help. -Logic is a systematic method of coming to the wrong conclusion with confidence. (Manley's Maxim)

rds to problem 12 I used m*c*delta T=m*c*delta T where I used the c as 4186J/kg*C for both of the specific heats. Is this right?

some help! Problem 011. A sample of lead used to make a lead sinker for fshing has an initial temperature of 25.7degrees C and is poured into a mold immediately after it has melted. How much energy is needed to melt 0.274 kg of lead? Assume the specifc heat, the latent heat and the...

Problem 9. A student drops metallic objects into a 224 g steel container holding 325 g of water at 28±C. One object is a 472 g cube of copper that is initially at 87 degrees C, and the other is a chunk of aluminum that is initially at 9 degreesC. To the students's surprise, the water...

Problem 16. Show that 1+2+4+...+26(n-1)=2^(n)-1 I first decided to use the formula: a_n=a_1*r^(n-1) Problem24. Find the sum of the series 1-3+5-7+9-11+...+1001. Problem 26. Suppose a doctor earns $40,000 during the first year of practice. Suppose also that each succeeding year the...

Regards to problem 9 Could you go more in dept with problem 9. Water+ aluminium = copper Water : m=325g 28 degrees Celciusus aluminium: m=? specifc heat: 899 J/kg degrees C copper: m=472g; temp=87 degrees C specifc heat: 387 J/kg degrees C

This is what I have done: x=(y2- (3/2)y )+ 15 = 4(y-0.75)^2 +15-.5625 = 4(y-0.75)^2+231/16 Is this right?

Find the vertex, axis of symmetry, focus, and directrix of each parabola. Indicate whether the vertex is a max. or min. point. Problem 45. x=4y^2 - 6y + 15

Problem 7. Given; specific heat of water=4186 J/kg* degrees Celcius Brass is an alloy made from copper and zinc. A 0.66 kg brasss sample at 98.6 degrees Celciusus is dropped into 2.33 kg of water at 4.6 degrees Celcius. If the equilibrium temperature is 7.0 degrees Celciusus, what is the...

Problem 8. Find x & y if the sequence 2y, 2xy, 2, xy/2,...is geometric. Problem 9. Find an arithmeitc sequence none of whose terms are divisible by 2, 3, or 7. Prtoblem 10. Consider two arithmetic sequences: A:3, 14, 25.. B: 2, 9 , 16, ... Write the first five...

Problem 3. Find the number of multiples of 7 between 30 and 300. Problem 4. How many 4-digits numbers are not divisible by 11? Problem 5. True or false? If the sequence a, b, c is arithmetic, then the sequence 2^a, 2^b,2^c is geometric. Explain.

What would the values of the pressures be if they give you just the volumes and temperatures?