Number of results: 303,577
Two blocks of masses 40.0kg and 20.0kg are stacked on a table with the heavier block on top. The coefficient of static friction is 0.600 between the top and bottom blocks and 0.300 between the bottom block and the table. What is the required magnitude of a horizontal force ...
Monday, October 30, 2006 at 4:10pm by Eric
crain carries concrete = 610kg distance carried vertically = 91m time carried = 90 seconds What is the kilo watt? I'm not sure which formulas to use... anyone know the answers? Power = (Work done)/(time required) The work done is M g H = 610x9.8x91 = 544,000 J. (H is the ...
Sunday, November 26, 2006 at 2:05pm by Mike
Posted by bailey on Monday, January 8, 2007 at 8:32pm. Posted by bailey on Monday, January 8, 2007 at 2:12pm. The area of a rectangular blanket in square centimetersis 40x^2+2x-65. The width is 4x-5cm^2. Find the dimensions of the blanket in terms of x. Can someone plz help ...
Tuesday, January 9, 2007 at 11:30am by bailey
A ball rolls horizontally off the edge of a tabletop that is 1.60 m high. It strikes the floor at a point 1.58 m horizontally away from the table edge. (Neglect air resistance.)How long was the ball in the air? What was its speed at the instant it left the table? The time in ...
Thursday, February 1, 2007 at 8:26pm by winterWX
An electron's position is given by r = 4.00t i - 6.00t^2 j + 5.00 k, with t in seconds and r in meters. In unit-vector notation, what is the electron's velocity? (Answer in terms of i, j, k, t.)What is v in unit-vector notation at t = 8 seconds? What is the magnitude of v at t...
Thursday, February 1, 2007 at 8:28pm by winterWX
The velocity v of a particle moving in the xy plane is given by v = (6.0t - 4.0t2) i + 4.0 j, with v in meters per second and t (> 0) is in seconds. What is the acceleration when t = 3.0 seconds? When is the acceleration zero? When is the velocity zero? When does the speed ...
Thursday, February 1, 2007 at 8:29pm by winterWX
A golf ball is struck at ground level. The speed of the golf ball as a function of the, where t = 0 at the instant the ball is struck and intial velocity is 31 m/s. The golf ball hits the ground when t = 2.5 and v = 19, and then v increases as the ball rises back into the air...
Thursday, February 1, 2007 at 9:36pm by winterWX
Where are the teachers?
I really need help and no offense but I would prefer Dr.Bob or Writeacher or somebody that knows what they're doing. Where are they? okay well i'm not a teacher but i will try to help if i can. i'm a tutor if that gives you any confidence Okay, how do you find the equation of ...
Friday, February 23, 2007 at 12:24am by Me
I am given a damping constant of 20 dyne*sec/meter...do I need to convert this if the rest of my givens are, for mass = 2kg, k (spring constant) = 82 N/m. I am trying to find the equation of motion of a spring but cannot solve it until I know how to convert/if I need to ...
Friday, July 13, 2007 at 2:36pm by COFFEE
Please check my work below and comment. A tank initially contains 80 gallons of fresh water. A 10% acid solution flows into the tank at the rate of 3 gallons per minute. The well-stirred mixture flows out of the tank at the rate of 3 gallons per minute. Find the amount of acid...
Friday, July 13, 2007 at 4:36pm by COFFEE
Why is I(x)=dP/dx*1/A x is the wavelenght lambda I is the intensity (I=P/A) P is the power A is the area Thanks in advance
Thursday, November 29, 2007 at 6:45am by Frederik
I dont understand the equation. Unit wise, the left side does not equal the right. Power is intensity/area, and dP/dl= intensity/volume, or energy density. So the left side does not equal the right side.
Thursday, November 29, 2007 at 6:45am by bobpursley
If I have 24 inch Diameter tires that rotated 101 times in 15 seconds, how do I find out how fast they were going?
Friday, December 7, 2007 at 12:49am by Kayln
1 rotation is 24pi so the speed would be 101*24pi/15 inches/sec = 507.68137 inches/sec =42.306781 ft/sec .... I divided by 12 = 2538.4069 ft/min ... I multiplied by 60 = ... = ... Can you see what I am doing to change my units? You probably want mi/hour. Tell me what you get.
Friday, December 7, 2007 at 12:49am by Reiny
For a velocity-time graph, what does the "tangent line of the curve" represent?
Sunday, July 13, 2008 at 8:19pm by Matt
Sunday, July 13, 2008 at 8:19pm by martha
Isn't this physics? Inadequate data.
Monday, May 17, 2010 at 3:51pm by PsyDAG
Math (Ms. Sue Please Help)
Christian -- Bobpursley is a math/physics/teacher. HM is probably a high school student.
Monday, September 12, 2011 at 8:39pm by Ms. Sue
math physics i think
depends. On ice? at the edge of a cliff? next to a brick wall? on a wet highway? It is neither math, nor physics.
Saturday, September 24, 2011 at 10:25am by bobpursley
Math/Physics(Please check work)
For an experiment on specific heat capacities of metal in physics, I am trying to calculate my percent error but am having some trouble. After collecting my experimental data for c (cal/g) for the object that was used which was aluminum my results are: trial 1 = .19 trial 2...
Thursday, November 1, 2012 at 12:51pm by Hannah