Molecular Physics | Thermodynamics Answers

Molecular Physics | Thermodynamics

A ball player hits a home run, and the baseball just clears a wall 18.8 m high located 115.0 m from home plate. The ball is hit an an angle of 35° to the horizontal, and air resistance is negligible. Assume the ball is hit at a height of 1.0 m above the ground.

(a) What is the initial speed?

(b) How much time does it take for the ball to reach the wall?

(c) Find the components of the velocity and the speed of the ball when it reaches the wall

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Question #140618

Molecular Physics | Thermodynamics

A body of 3kg and volume 4×10m³ is hung from a balance of graduated in newtons what is the reading of the balance when the body is immersed in water is (a) in air (b) fully immersed in water (c) ⅓ immersed in water (d) fully immersed in paraffin. ( Density of water = 10³kgm³, density of paraffin = 800kgm³
(ii) find the mass of an iceberg which floats in sea water displacing 45m³( density of sea water = 1030kgm³
(iii) what is the tension in the cable holding a mine of mass 600kg and volume 0.8m³ to the sea bed, so that it is totally suerged.

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Question #140308

Molecular Physics | Thermodynamics

The total mass of the hydrogen gas in the Hindenburg zeppelin was 18,000 kg. What volume did the hydrogen occupy? (Assume that the temperature of the hydrogen was 0°C and that it was at a pressure of 1 atm.)

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Question #140265

Molecular Physics | Thermodynamics

Steam enters a nozzle at a pressure of 7 bar and 205°C (h = 2850 kJ /kg) and leaves at a pressure of 1.5 bar. The initial and exit velocities of steam are 40 m/s and 700 m/sec respectively. The mass flow rate through the nozzle is 1400 kg/h. the heat loss from the nozzle 11750 kJ/h. determine the final enthalpy of steam and the nozzle exit area if the specific volume is 1.24 m3 / kg.

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Question #140246

Molecular Physics | Thermodynamics

What relation exist between the range covered by two projectiles thrown up with the same initial velocities at angles of projection that are complementary

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Question #140238

Molecular Physics | Thermodynamics

A solid cylinder of radius r(1)=2.5cm length L(1)=5.0cm and temperature 40°C is suspended in an environment of temperature 60°C .The thermal radiation transfer rate for cylinder is 1.0 Watt.If the cylinder is stretched until its radius becomes r(2)=0.50 cm the thermal radiation transfer rate is changed to
Ans 3.35W

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Question #140162

Molecular Physics | Thermodynamics

A solid sphere and a solid cylinder each of mass M and radius R are rolling with a linear speed on a flat surface without slipping.Let L(1) be magnitude of the angular momentum of the sphere with respect to a fixed point along the path of the sphere. Likewise L(2) be the magnitude of angular momentum of the cylinder with respect to the same fixed point along its path.The ratio (L(1))/(L(2)) is
Ans 14/15

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Question #140073

Molecular Physics | Thermodynamics

A porcelain vase weighing 49.0N is supported by a tripod. The legs of the tripod are spaced at 120° apart and are inclined 60° with the horizontal. Find the force exerted by each leg of the tripod.

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Question #140072

Molecular Physics | Thermodynamics

A porcelain vase weighing 49.0N is supported by a tripod. The legs of the tripod are spaced at 120° apart and are inclined 60° with the horizontal. Find the force exerted by each leg of the tripod.

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Question #139766

Molecular Physics | Thermodynamics

A gas in a piston-cylinder assembly undergoes two processes in series. From state I to state 2 then: is energy transfer by heat to the gas of 500 kJ and the gas does work on the piston amounting 800 kJ. The second process. from state 2 to state 3 is a constant pressure compression at 400 kPa, during which there is a heat transfer from the gas amounting 450 kJ. The following data are also known: U1 = 2000 kJ and U3 = 3500 kJ. Neglecting changes in KE and PE, calculate the change in volume of the gas during process 2-3.

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Molecular Physics | Thermodynamics Answers

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