Friday
August 29, 2014

Posts by Dia


Total # Posts: 10

chemistry
At a constant pressure, the volume of a gas is increased from 150.0 L to 300.0 L by heating it. If the original temperature of the gas was 20.0 degrees C, what will its final temperature (in Kelvin) be?
February 24, 2012

Physics
A cylinder contains the helium gas with a volume of 0.1 m3 at a pressure of 220 kPa. The gas is compressed to a volume of 0.02 m3. The process is adiabatic and the specific heat ratio of the gas is 1.66. Determine (a) the pressure in the cylinder after compression; (b) work ...
December 18, 2011

Physics
A horizontal spring is fixed at one end, then stretched 3.0 cm by a force of 6.0 N. Afterwards, a 0.50 kg body is attached, pulled 2.0 cm from its rest position, and released. Find (a) spring constant, (b) angular frequency, (c) frequency and (d) period.
December 18, 2011

Physics
The position of a body moving in simple harmonic motion is given by m t x       + = 4 9 cos 3 π . For this motion, what are the (a) amplitude, period...
December 18, 2011

Physics
Thanks i will do the rest
December 18, 2011

Physics
A block has mass 800 g, whose is fasten to a spring with spring constant k is 70 N/m. The block is pulled a distance x = 15 cm from its equilibrium position at x = 0 on a frictionless surface and released from rest at t = 0. (a) What force does the spring exert on the block ...
December 18, 2011

physics
What is the acceleration for the turtle moving with constant velocity of 5m/s to tghe right
October 26, 2011

Physics
A man walks 40 m @ 30 degrees N of E, then 70 m @ 60 degrees S of E and finally 20 m @ 45 degrees N of W. What is the displacement of the man?
June 14, 2011

space
why we don't see comets until they are mear the sun?
May 14, 2008

space
why is looking through a powerful telescope like looking back through time?
May 14, 2008

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