Popular questions and responses by emm
  1. physics

    Two blocks are connected by a string over a frictionless, massless pulley such that one is resting on an inclined plane and the other is hanging over the top edge of the plane. the hanging block has a mass of 16 kg and the one on the plane has a mass of 8

    asked on January 18, 2010

    A 8.52 -kg block of metal is suspended from a scale and immersed in water as in Figure P9.30. The dimensions of the block are 12.0 cm x 10.0 cm x 10.0 cm. The 12.0-cm dimension is vertical, and the top of the block is 9.0 cm below the surface of the water.

    asked on October 28, 2012
  3. Science

    One scientist discovered a new theory on the evolution of stars. Why is it necessary for scientists all over the world to agree with the theory before it can be accepted? A) it make certain that the results are reliable B) to transform the results of the

    asked on June 27, 2017
  4. math

    omar lays down straight tracks for his model railroad. each length of track is 8 inches long. which of the following could be the total length of omar's track?

    asked on January 15, 2013

    An air mattress is 2.36 m long, 0.640 m wide, and 12.2 cm deep. If the air mattress itself has a mass of 0.252 kg, what is the maximum mass it can support in fresh water?

    asked on October 28, 2012
  6. physics help- tension

    So to describe the picture: There is a rope holding up a 2kg block, this 2kg block has a rope attached to it holding another 2 kg block. This rope is accelerating. How can I find the tension in the rope? Time is .7 and Velocity is .35. I'm really confused.

    asked on December 6, 2009
  7. Physics

    A basketball player is trying to make a half-court jump shot and releases the ball at the height of the basket. Assuming that the ball is launched at 51 degrees, 14.0 m from the basket what speed must the player give the ball? So far I found the Vy to be

    asked on November 16, 2009
  8. Algebra

    This is a word problem I am supposed to solve with systems. I am having trouble setting it up if anyone could help me. A coin bank contains only dimes and nickels. The bank contains 46 coins. If 5 dimes and 2 nickels were removed the total value of the

    asked on November 13, 2008
  9. Algebra

    If (x+2)² = 25 and x > 0, what is the value of x? I have no idea what to put for x, if someone could please show me the steps ?

    asked on October 7, 2008
  10. Chemistry

    When showing chemical formulas for compounds, how do i know how many electrons an element gives up in it's outer level, or how many electrons an element gains in it's outer level?

    asked on October 22, 2007
  11. science

    what is one way birds, reptiles and fish adapt to their environments?

    asked on June 5, 2007
  1. physics

    Also the angle of the plane is at 37 degrees

    posted on January 18, 2010
  2. physics help- tension

    Yes the time is when it begins accelerating. And we have to find the tensions for both ropes...which is where I'm confused. I was able to find acceleration but now I am not sure how to use it to find the tensions.

    posted on December 6, 2009
  3. Physics

    I'm guessing I found the Vy correctly. I use Cos(51)=7/H which gave me 8.55. So if I use Vy/Sin(51) that gives me...11?? Thanks!

    posted on November 16, 2009
  4. Algebra

    okay thanks! I understand now.

    posted on October 7, 2008