Friday

April 18, 2014

April 18, 2014

Total # Posts: 11

**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?

**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?

**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 do...

**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.

**Physics**

The position of a body moving in simple harmonic motion is given by m t x ï£· ï£¸ ï£¶ ï£¬ ï£ ï£« + = 4 9 cos 3 Ï€ . For this motion, what are the (a) amplitude, period,...

**Physics**

Thanks i will do the rest

**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 ju...

**physics**

What is the acceleration for the turtle moving with constant velocity of 5m/s to tghe right

**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?

**space**

why we don't see comets until they are mear the sun?

**space**

why is looking through a powerful telescope like looking back through time?

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