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Thermodynamics : Calculating the changes in internal energy of a system and the environment.

A system does 164 J of work on its environment and gains 77 J of heat in the process. Find the change in the internal energy of (a) the system (b) the environment

Subject:

Physics

Topic:

Other

Posting ID:

5881

OTA ID:

102156

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Venturi meter readings sphere density.

1a) A venturi meter has 0.02556m^3 of flow per second through its 45mm dia throat.If the pipe is 58mm in diameter,what will the differential reading of mercury across it be? b)A metal sphere 60mm in dia is submerged in oil with a relative density of 0.9.Need to find the density of the sphere.There is a downward force of 8.31N when the sphere is submerged? need step by step solutions.

Subject:

Physics

Topic:

Other

Posting ID:

5905

OTA ID:

103144

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Periodic Waves : Calculating time given speed of a transverse wave, amplitude, and distance.

The speed of a transverse wave on a string is 450 m/s, while the wavelength is 0.18m. The amplitude of the wave is 2.0mm. How much time is required for a particle of the string to move through a total distance of 1.0 km?

Subject:

Physics

Topic:

Other

Posting ID:

5910

OTA ID:

102922

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A mathematical description of a wave.

The displacement (in meters) of a wave is y= 0.26 sin (pi *t-3.7 pi *x), where t is in seconds and x is in meters. (a) Is the wave traveling in the +x or -x direction? (b) What is the displacement y when t= 38 seconds and x= 13 meters?

Subject:

Physics

Topic:

Other

Posting ID:

5912

OTA ID:

103484

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Sound

A sonar unit on a submarine sends out a pulse of sound into seawater. The pulse returns 1.30 seconds later. What is the distance to the object that reflects the pulse back to the submarine?

Subject:

Physics

Topic:

Other

Posting ID:

5913

OTA ID:

103144

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