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Q. A 3000 flask is initially open while in a room containing air at 1.00 and 20 . The flask is then closed and immersed in a bath of boiling water. When the air in the flask has reached thermodynamic equilibrium, the flask is opened and air is allowed to escape. The flask is then closed and cooled back to 20 .
Q. The burning of gasoline in a car releases about 3.0 × 104 kcal/gal. If a car averages 39 km/gal when driving 92 km/h, which requires 20 hp, what is the efficiency of the engine under those conditions?
A ball is thrown from the top of a building upward at an angle of 39degrees to the horizontal and with an initial speed of 24m/s. The ball is thrown at a height of 57 m above the ground and hits the ground 98.55 m from the base of the building. Wh..
A shell of mass m and speed v explodes into two identical fragments. If the shell was moving horizontally (the positive x direction) with respect to Earth, and one of the fragments is subsequently moving vertically with speed v, find out the velocity..
Assume that the sun runs out of nuclear fuel & suddently collapses to form a white dwarf star, with a diameter equal to that of the Earth. Estimate the new rotation period of the Sun.
An 8,000 rocket is shot straight up from the Earth's surface with the initial speed of 800 m/s. How high does it go.
A ballplayer catches a ball 2.75 seconds after throwing it vertically upward. With what speed did he throw it? Calculate the final & resultant velocity and acceleration.
Find out h orizontal angle of projectile
Find out the change in entropy of the system
What are the total displacement and angle of displacement
A 0.39 kg iron horseshoe that is initially at 745°C is dropped into a bucket containing 24 kg of water at 46°C. What is the final equilibrium temperature? Neglect any heat transfer to or from the surroundings.
What are the d irections of electric field
A catcher stops a ball traveling at 28.0 m/s in a distance of 55.30 cm and feels a force of 313 N against his glove. What is the mass of the ball.
Calculating plants maximum possible thermal and actual efficiency.
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