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a) To fill a child's backyard inflatable wading pool you use a garden hose with a diameter of 2.9 cm. Water flows from this hose with a speed of 1.3 m/s. How long will it take to fill the pool to a depth of 29 cm if it is circular and has a diameter of 3.2 m?
b) If there is a section of the hose where the diameter decreases to 1.93 cm, what is the speed of the water in this section?
A car of mass = 1400 travelling at 60.0 enters a banked turn covered with ice. The road is banked at an angle, and there is no friction between the road and the car's tires. Use = 9.80 throughout this problem.
The rotor (flywheel) of a toy gyroscope has mass 0.140 kg. Its moment of inertia about its axis is The mass of the frame is 0.0250 kg. Find the upward force exerted by the pivot
An 85.1 kg base runner begins his slide into second base while moving at a speed of 5.9 m/s. The coefficient of kinetic friction between his clothes and ground is 0.68. He slides so that he comes to rest just as he reaches the base.
The potential difference between two parallel conducting plates in vacuum is 475 V, What is the kinetic energy of the alpha particle when it reaches the other plate
A hiker walks 3.50 km at an angle of 45.0 degrees north of west. After that the hiker walks 1.5 km south. What is the magnitude and direction of hiker's totally displacement.
Two resistors have resistances R(smaller) and R(larger), where R(smaller)
You measure distances from the center of a diffraction pattern (y) to a series of dark fringes on a screen, What is the wavelength of the laser you used to collect the data
A projectile is launched from a cannon at ground level at an angle of 62.0 degrees elevation and has a muzzle velocity of 481 m/s. Explain how many seconds after it is fired does it reach max height?
How much energy must be added to a bowl of 125 popcorn kernels in order for them to reach a popping temperature of 175celsious? assume that their initial temperature is 21 celsious, that specific heat capacity of popcorn is 1650 j/kgcelsious, and ..
mall candle is 37cm from a concave mirror having a radius of curvature of 22cm. What is the focal length of the mirror? Follow the sign conventions
carnival ride has a large horizontal steel disc of radius 5m from which cars are suspended by a 6m long chain. the disx is rotated about its axis so that the cars swing out and revolve in a circular path. at operation speed the angle of the chains ..
A positive charge Q1 = 3.00 µC is in the origin and a negative charge Q2 = -5.00 µC is at point x = 11m. Find the position of point P between the charges, where the electric potential equals zero.
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