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  1. R

    Need help. How do i start the problem, thank you.

    Homework Statement A basketball player does 2.43 X 105 J of work during her time in the game, and evaporates 0.110 kg of water. Assuming latent heat of 2.26 X 106 J/kg for the perspiration (the same as for water), (a) determine the change in the player’s internal energy, and (b) the number...
  2. R

    Tourist Submarine

    I am not sure what you are trying to ask. I need to know h. But in order to find h i need a way to find P2. I don't know how to start the problem.
  3. R

    Tourist Submarine

    Homework Statement A submarine called the Deep View 66 is currently being developed to take 66 tourists at a time on sightseeing trips to tropical coral reefs. According to guidelines of the American Society of Mechanical Engineers (ASME), to be safe for human occupancy the Deep View 66...
  4. R

    Pressure of person on chair Question

    Thank you. That really helped
  5. R

    Pressure of person on chair Question

    Here is the question again. I don't understand it? A 67 {\rm kg} person sits on a 3.6 {\rm kg} chair. Each leg of the chair makes contact with the floor in a circle that is 1.4 {\rm cm} in diameter. Here is what they want me to find - Find the pressure exerted on the floor by each leg of...
  6. R

    Pressure of person on chair Question

    It doesn't say how many legs the chair has. So I believe we should assume that the chair has 4 legs
  7. R

    Pressure of person on chair Question

    Homework Statement A 67 kg person sits on a 3.6 kg chair. Each leg of the chair makes contact with the floor in a circle that is 1.4 cm in diameter. Homework Equations p= M/V P= F/A Pg = P - Pat Pat = 1.01 x 105 N/m2 The Attempt at a Solution I figured out the area of the circle using the...
  8. R

    Stoichiometry applied to xN2 + yH2

    still i don't get it, if the theoretical yeild of NH3 is 2 mol and the limiting reagent is H2 how is that suppose to work i don't get it.
  9. R

    Stoichiometry applied to xN2 + yH2

    I believe the reagent is N2 (that's N and the subscript 2)
  10. R

    Stoichiometry applied to xN2 + yH2

    Let me ask u another question Theoretically, how many moles of NH3 will be produced I believe it's 2 Moles of NH3 because that's how many there are in the balanced equation. Is it right if so How should i get the actual yield of NH3 if the percent yield is 80%, how many moles of NH3...
  11. R

    Stoichiometry applied to xN2 + yH2

    6.0 moles of N2 thats are mixed with 12.0 moles of H2 according to the following equation: The equation is already balanced: N2(g)+ 3H2(g) yields 2NH3 (g) The questions asks for what is the chemical in excess? is it H2 or N2 I solved the problem but i want to make sure if it is right...
  12. R

    So far am i correct

    idk if i did this correctly so far so here goes. The question states A large rubber ball (8.80 kg) is fired straight down from the roof of a building from a spring loaded mechanism that stored 987 J of elastic potential energy. The building roof is 14.0 meters above ground. The rubber...
  13. R

    Did i do this problem correctly

    i got that but i need the formula though
  14. R

    Did i do this problem correctly

    well i don't have the velocity to use the kinetic energy formula u got any advice for that.
  15. R

    Did i do this problem correctly

    idk if i did this correctly so far so here goes. The question states A large rubber ball (8.80 kg) is fired straight down from the roof of a building from a spring loaded mechanism that stored 987 J of elastic potential energy. The building roof is 14.0 meters above ground. The rubber...
  16. R

    Final Temp of Clay

    k my fault make sense yup i forgot about the decimal ur answer is right sry. how did u do the second one and is this thing do tommorow.
  17. R

    Final Temp of Clay

    yup. that's what i did and when is this thing due do u know for sure i believe he said it's due tommorow.
  18. R

    Final Temp of Clay

    yeah that's exactly how i did it to get the change in temp. because u can't do the change in temp without the heat.
  19. R

    Final Temp of Clay

    he said u got till tuesday. First i found the kinetic energy which came out to be 638.97 and then i found the change in temp by using the kinetic enerygy which is heat. because that is the reason why they gave the velocity. and i got 28 degrees.
  20. R

    Final Temp of Clay

    well this thing is due tuesday. i know that. and i got 28 by doing exactly what u did and then i added the 28 with 21 to get my final temperature the 28 is the change in temp.
  21. R

    Final Temp of Clay

    hey suraj i got a different answer to that problem. i did what u did and i got 28 degree celcius but i did not get 21.28 as my final answer.
  22. R

    Why does a desk lamp often have small holes at the top of the Metal Lampshad

    Question is Why does a desk lamp often has small holes near the top of the metal lampshade. How do these holes keep the lamp cool. This is what i think. Heat travels upward by air convection. Since air is a poor conductor, very little heat travels sideways. That is my reason what do u...
  23. R

    Did i do this problem right

    This was the question On a pleasant fall day (temperature of 21.0 degree Celcius) a lump of clay (with mass of .855 kg) is thrown against the wall with a speed of 38.0 m/s. The clay deforms as it sticks to the wall, noiselessly. Assuming no heat escapes into the air, what will be the final...
  24. R

    A problem

    k the question states On a pleasant fall day (temperature of 21.0 degree Celcius) a lump of clay (with mass of .855 kg) is thrown against the wall with a speed of 38.0 m/s. The clay deforms as it sticks to the wall, noiselessly. Assuming no heat escapes into the air, what will be the...
  25. R

    A problem help

    The question states. Peter is heating water on the stove to boil eggs for a picnic. How much heat is required to raise the temperature of his 10.0 kg vat of water from 20.0 degrees celcius too 100 degree celcius. I worked out my problem in this format Delta Q= mass times specific heat...
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