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A ball with a horizontal speed of 1.25 m/s rolls off a bench 1.00 m above the floor. How long will it take for the ball to hit the floor?
A bat emits a sound whose frequency is 70.9 kHz. The speed of sound in air at 20.0 oC is 343 m/s. However, the air temperature is 40.4 oC, find the wavelength of the sound
What are (a) the lowest frequency, (b) the second lowest frequency, and (c) the third lowest frequency for standing waves on a wire that is 7.65 m long, has a mass of 131 g, and is stretched under a tension of 448 N?
q1. a single bead can slide with negligible friction on the stiff wire that has been bent into a circular loop of
A roller coaster car of mass 250 kg has a speed of v0 = 12 m s-1 at point A, located at a height of h = 15 m. Find the speed of the car when it reaches point B. Use energy ideas
The nucleus of an atom consists of protons and neutrons (no electrons). A nucleus of a carbon-12 isotope contains six protons and six neutrons.
A current of constant density, J0, flows through a very long cylindrical conducting shell with inner radius a and outer radius b. What is the magnetic field in the regions rb
A container of cross-sectional area 102 cm2 contains liquid of density 1.50 g/cm3 to a height of 5.90 cm above a small hole of area 1.00 cm2 in the side. Find the speed of the fluid as it leaves the hole
A convex mirror is needed to produce an image that is seven-eighths the size of an object and located 28 cm behind the mirror. What focal length should be specified
A 13.1 k? resistor and a capacitor are connected in series and then a 12.0 V potential difference is suddenly applied across them, Calculate the time constant of the circuit
An L-R-C series circuit, R=150 ohms, L= 0.750H, and C= 1.70x10^-2uF. The source has a voltage amplitude of 140V, What is the average power delivered by the source
A point charge q = +37.0 µC moves from A to B separated by a distance d = 0.178 m in the presence of an external electric field, Find the work done by the electric force
A 100% efficient transformer has 120 primary turns and 840 secondary turns. Calculate the primary voltage and primary current
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