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A fire truck attaches two fire hoses to a hydrant to fight a fire. each hose has a diameter of 20 cm. The underground water pipe going to the hydrant has a diameter of 100 cm. In the underground pipe, the water has a speed of 2.0 m/s.
(a) How many kilograms of water are put on the fire in 30 minutes.
(b) What is the speed of the water in the fire hoses?
A 2kg box slides along a frictionless surface with a speed of 15m/s and approaches a horizontal spring with a spring constant of 2000N/m. If one end is fixed, How far will the spring compress in stopping the box
The mass density of an object is 17.3 g/cc, and its volume is determined to be 28.2 cc, What is the mass of the object
Force F = (1.0 N) + (-1.0 N) acts on a pebble with position vector r = (2.70 m) + (-2.1 m) , relative to the origin. What is the resulting torque acting on the pebble about the origin
A Styrofoam box has a surface area of 0.79 m2 and a wall thickness of 2.0 cm. determine the thermal conductivity of the Styrofoam
At the same time a stone downward at 10 m/s from the roof of a 60 m tall building another is stone is thrown upward at 35 m/s from street level. What is the velocity of each stone when they cross paths
The drill pipe has an outer diameter of 75 mm, a wall thickness of 6 mm, and a weight of 0.8 kN/m. If it is subjected to a torque and axial load as shown.
the magnetic field perpendicular to a circular coil of 5 turns and diameter 20cm changes from +1.85 T to -.25 T in 30 ms. Find the change in magnetic flux and induced emf
In a Carnot cycle, the isothermal expansion of an ideal gas takes place at 400K, determine the work performed by the gas during the cycle
What is pressure in the cylinder
a birthday cake candle 4 cm high is 10 cm from a converging lens whose focal length is 15 cm. use a ray diagram on a
150g of steam at 100C (373K) is injected into a container containing 250g of ice and 150g water both at 0C (273K). What is the change in entropy of the environment
question1a 6.8 g lead bullet travelling at 520 ms is stopped by a large tree. if half kinetic energy of the bullet is
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