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A main supply pipe of radius 7.9 mm is connected to two pipes A and B of radii 4.83 mm and 3.40 mm respectively. If the speed of the water in the main supply pipe is 7.74 m/s, what is the speed of the water in pipe A, if pipe B is closed (i.e., blocked)?
A model rocket engine has an average thrust of 5.26 N. It has an initial mass of 25.9 g, which includes fuel mass of 13.4 g. What is the average exhaust speed of the engine
A penny is placed at the outer edge of a disk radius = .150 m that rotates about an axis that is perpendicular to the plane of the disk at the center. The period of the rotation is 1.80 s. Find out the minimum coefficient of friction neccesary to..
The skater farthest out has a mass of 80.0 kg and is 6.40 m from the pivot. He is skating at a speed of 6.50 m/s. Describe the magnitude of the centripetal force that acts on him.
The current in a resistor is given by I = (5.14) sin (70 pi t) when a voltage given by V = (180V) sin (70 pi t) is applied to it. What is the period of the voltage source
A 0.575 kg mass falls from a height of 3.95 m. If all of the energy of this mass could be converted to visible light of wavelength 5.29E-7 m
An undersea research chamber for aquanauts is spherical with an external diameter of 7.93 m. The mass of the chamber, when occupied, is 64800 kg. What is the buoyant force on the chamber
A 270 pF capacitor is charged to a potential difference of 60 V, and the charging battery is disconnected. Calculate the dielectric constant of the inserted material
Estimate the pressure exerted on a floor by the one pointed chair leg (50 kg on all four legs) of area = 0.08 cm2
Standing on ground 3.5 from the wall of a building, you want to throw a package from your 1.6 shoulder level to someone in a second-floor window 4.5 above the ground.
In the solar system frame, two events are measured to occur 3.0 hours apart in time and 1.5 hours apart in space. What is the time seperation between the events in the alien's frame
Before starting this problem, review COnceptual Example 3. Suppose that hail described there bounces off the roof of the car with a velcity of +15 m/s. calculate the force exerted by the hail of the roof
An iron casting containing a number of cavities weighs 23137.8 N in air and 19020.3 N in water. What is the total volume of all the cavities in the casting
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