Recent content by MrGoodyear812

  1. M

    Carnot Air Conditioner Question.

    Q: A Carnot air conditioner operates between an indoor temp of 20C and an outdoor temp of 39C, how much ENERGY does it need to remove 2000 J of heat from the interior of the house? A: 130J i got 121J O.o?
  2. M

    Energy Equations: U, K, E for 0-4 cm Compressions

    I've been using those equations and plugged them in (we use an online website) and it was right the first time, and now its not...and logic would state that doing it again would yield correct answers...but I'm not getting them! Why? I haven't a clue.
  3. M

    Energy Equations: U, K, E for 0-4 cm Compressions

    A 1.75 kg block slides with a speed of 0.880 m/s on a frictionless horizontal surface until it encounters a spring with a force constant of 787 N/m. The block comes to rest after compressing the spring 4.15 cm. Find the spring potential energy, U, the kinetic energy of the block, K, and the...
  4. M

    How do I find the derivative of cos(x)^(x+7)?

    even the y? so i'd have: ln(y) = (x+7)ln(cos(x)) how do i get rid of the ln on the y? cause i knew it was a ln problem, just i don't know how to get rid of the ln on the y
  5. M

    How do I find the derivative of cos(x)^(x+7)?

    Help! I haven't the slightest clue on how to do this... thanks in advance!
  6. M

    A golfer gives a ball a maximum initial speed of 39.9 m/s.

    What is the longest possible hole-in-one for this golfer? Neglect any distance the ball might roll on the green and assume that the tee and the green are at the same level. in m and: What is the minimum speed of the ball during this hole-in-one shot? please explain your answers :D...
  7. M

    The vector -5.2 has a magnitude of 32 and points in the positive direction.?

    He just emailed me this: Bx = 34m in this case --> Ax = (34m) / (-5.2) = ?? (a negative number), so vecA is pointing in the negative x-direction. The magnitude of A will just be |Ax| (since there's no y-component), which is positive.
  8. M

    The vector -5.2 has a magnitude of 32 and points in the positive direction.?

    Just got this email from my prof Bx = 34m in this case --> Ax = (34m) / (-5.2) = ?? (a negative number), so vecA is pointing in the negative x-direction. The magnitude of A will just be |Ax| (since there's no y-component), which is positive.
  9. M

    The vector -5.2 has a magnitude of 32 and points in the positive direction.?

    5.2 is the value of hte vector is what I am understanding...idk I am so confused... and that is word for word
  10. M

    The vector -5.2 has a magnitude of 32 and points in the positive direction.?

    Thats why this problem is killing me...its not enough info thats honestly everything the book gave us
  11. M

    The vector -5.2 has a magnitude of 32 and points in the positive direction.?

    OH! SORRY! it should be the vectore -5.2A
  12. M

    The vector -5.2 has a magnitude of 32 and points in the positive direction.?

    Find the x component of the vector A? Find the magnitude of the vector A? Please also explain your work too thanks in advance