Questions asked by Conper

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• How do i find the acceleration of a cylinder's center of mass while it is on a incline ramp? It starts initially at the top of the ramp and slides down the ramp
  
• Is angular momentum equal to Inertia times Omega and why?
  
• Are ADHD and ADD linked to learning disabilities?
  
• (Thermodynamics) Which of the following is not an assumption on which the kinetic model of an ideal gas is based? and why?
  
• A student suggests that the alternative concept of a whole-life might be simpler than a half-life. The whole-life would be the time required for all the radioactive nuclei in a sample to decay. Why would this suggestion not work?
  
• Question is too big, however, I desperately need help plz?
  
• The isotope Francium 224 has a half life of 20 minutes. A sample of the isotope has an initial activity of 9-- disintegrations s^-1. The approximate activity of the sample an hour later will be what? Multiple choice question. Please explain why for answer
  
• A closed box has a square base with side length L feet and height h feet. Given that the volume of the box is 39 cubic feet, express the surface area of the box in terms of L only. Need help please?
  
• How would you simplify #e^8/(e^(−1) + e^(−2))#?
  
• Five books of different heights are arranged in a row. Find the probability that (a) the tallest book is at the right end. (b) the tallest and shortest books occupy the end position (c) the tallest and shortest books are together ?
  
• I need help simplifying this expression?: cos^2 (x) /(1+sin(x))
  
• Sin^2(x)= 1/2 ? i need help solving this
  
• A closed box has a square base with side length l feet and height h feet. Given that the volume of the box is 35 cubic feet, express the surface area of the box in terms of l only. ??
  
• Log b 5 = 1/4..... what is log b 25 =?? fyi, b is the base a random variable..
  
• F(x) = 7x^2 + 4, find and simplify using the derivative function f(a+h) -f(a)/ (h) ?
  
• What is cos pi/3 - sin 3pi/4???
  
• Simplify (cot x secx)/(cscx) ?
  
• Which would you expect to have the higher melting point(or boiling point): C8H18 or C4H10? Explain
  
• Rotate region bounded by given curves y= 7-x^2 by the x-axis when (x = -2, 2)?
  
• How to integrate this function: sec(a*theta) * tan(a*theta) dtheta when your u = a*theta ?
  
• How to integrate from 4 to 0, (x)/(1+2x)^1/2 dx ?
  
• Prove that #1- cos(x) = 2sin^2(x/2)#?
  
• A ball is dropped from the top of a building 25m high. How much time will the ball need to reach the ground?
  
• You place a 133 g is placed on a vertical spring. The spring then compresses by 11 cm. What is the stiffness of the spring (in kg/s^2)?
  
• A 0.78 kg block is attached to a horizontal spring of force constant 256 kg/s2, resting atop a frictionless surface. The block is pulled back 30 cm and then released. What is the period of the oscillations of the block? Maximum speed of the oscillation?
  
• How do you integrate #int_0^1 1/(1+(x)^(1/2)) dx# ?
  
• Integrate (x^4 +2x^3 -1)/(x+1)(x+2) dx?
  
• Integral of sin(7x)cos(4x)dx?
  
• Integrate (1)/(sinx +4cosx)dx?
  
• Integral of dx/sqrt(x^2 -2x-8) ?
  
• Integral of sqrt(x+2)/(x+1) dx?
  
• When a falling meteoroid is 3.4 times the radius of the earth from the Earth's surface, what is its acceleration?
  
• What is the speed and mass of the object?
  
• A model rocket engine has an average thrust of 5.1 N. It has an initial mass of 38 g, which includes fuel mass of 10.5 g. The duration of the burn is 2.18 s. (a)What is the average exhaust speed of the engine?
  
• A 2.3 kg steel ball strikes a wall with a speed of 8.5 m/s at an angle of 64⁰ with the surface. It bounces off with the same speed and angle. If the ball is in contact with the wall for 0.448 s. What is the average force exerted by the ball?
  
• A 1.55 kg particle moves in the xy plane with a velocity of v = ( 3.51 , -3.39 ) m/s. Determine the angular momentum of the particle about the origin when its position vector is r = ( 1.22 , 1.26 ) m. ?
  
• What is the new angular speed of the merry-go-round (in rev/min)?
  
• A satellite is placed in synchronous orbit around an exoplanet of mass 44⨯10^24 kg and radius 18⨯10^6 m. If the planet's day is 87.8 hours, at what altitude should you place the satellite?
  
• (a) At what time does the cart reach its farthest distance from the first sensor? b) How far from the first sensor does this happen? (c) What is the acceleration at that spot?
  
• A sailboat is pushed with a linear drag coefficient 83 g/m by wind blowing at a speed 2.97 m/s, while being slowed by a quadratic drag with the still water of 105 g/s. What is the cruising speed of the sailboat?
  
• Calculate the geometric series? Please