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Steam enters at 4 MPa and 400 degrees C enters a nozzle steadily with a velocity of 60 m/s, and it leaves at 2 MPa and 300 degrees C. The inlet area of the nozzle is 50 cm^2, and the heat is being lost at a rate of 75 kJ/s. Determine the mass flow rate and exit velocity of the steam.
a copper piece of mass 10g is suspended by a vertical spring. The spring elongates 1 cm over its natural length to keep the piece in equilibrium. Find the elongation of the spring
Can the atoms in a liquid helium at 4K (interatomic distance about 0.1 nanometer) be adequately represented by nonspreading wave packets, so that their motion can be described classically.
A 2000kg vehicle is travelling down the road at 20m/s (45 mph) when it reaches an intersection. Between rubber and dry asphalt, the coefficient of friction is 0.80. What is the minimum distance necessary for the car to stop.
What is the period of oscillation of the scale? State your reply numerically in seconds.
A person with perfect pitch sits on a bus bench listening to the 445 Hz horn of an approaching car. If the person detects the frequency of 488 Hz, how fast is the car moving.
A 28 cm tall object is placed in front of a concave mirror with a radius of 33 cm. The distance of the object to the mirror is 84 cm. Calculate the focal length of the mirror. Calculate the image distance. Calculate the magnification of the image ..
A fully charged capacitor with a voltage of 120 V is discharged through a resistor. At this time, what is the voltage across the resistor
The speed of an alpha particle is determined to be 8.75×106 m/s. If all of its kinetic energy is acquired by passing through an electric potential, what is the magnitude of that potential
If 0.040kg of ice at 0 C is added to 0.390kg of water at 30 C in a 0.130-kg aluminum calorimeter cup
A cubical block of ice 56.0 cm on an edge is placed on a level floor over a speck of dust. How many cm below the upper surface of the ice
How far from a concave mirror of radius 0.25 m must an object be place for a real image to be formed 1 m from the mirror? What is the magnification of that image
Two friends are carrying a crate of mass 200 kg up a flight of stairs. The crate has length 1.25 m and height 0.500 m, What is the magnitude of the upper person's force
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