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An electric doorbell requires a 12V, 60 Hz ac supply. (a) What turn ratio is required on a transformer to operate from a 120 V, 60 Hz ac supply? (b) Is this a step-up or step-down transformer? (c) If the transformer is connected the wrong way around the circuit, what voltage is supplied to the doorbell?
Nichrome wire of cross-sectional radius 0.782 mm is to be used in winding a heating coil, find the length of wire you must use to wind the coil
A couple is defined as two parallel forces, separated by a distance, that have equal magnitudes but opposite directions. A couple only produces a rotation in a specified direction. The moment produced by a couple is known as a couple moment.
A man whose weight = 584N is doing pushups. His center of gravity is located 0.410m from where his hands tough the ground, Find the normal fource exerted by the floor on EACH hand
A 17.5 kilogram block is at rest on a frictionless incline that makes an angle of 25.0 degress with respect to the horizontal. What is the magnitude of the horizontal force
A massless spring of constant k = 1000 N/m is fixed on the right side of a level track. A block of mass m = 1.50 kg is pressed against the spring, compressing it a distance d =20.0 cm. The block (initially at rest) is then released and travels tow..
A square loop of wire consisting of a single turn is perpendicular to a uniform magnetic field. What is the flux that passes through the circular loop
On a frozen pond, a 11.6 kg sled is given a kick that impartsto it an initial speed of vo = 2.15 m/s. find the distance the sled moves before coming to rest
One mole of an ideal monatomic gas is expanded adiabatically and quasi-statically from a pressure of 1,172 kPa and a temperature of 273 K to a pressure of 279 kPa. What is the final volume of the gas in cubic metres?
Glenn gently pours acetic acid, index 1.27 onto some antimony trioxide, index of refraction 2.35. What angle will Glenn find in the acetic acid
as a sled moves across a flat snow-covered field at constantvelocity, is any work done? how does air resistance enter into the picture
A parallel-plate capacitor is constructed with circular plates of radius 6.5×10?2m . The plates are separated by 0.27mm, Find the value of the dielectric constant, k
A ball of mass M = 17 kg is suspended from a vertical inextensible string of length l = 1.5 m. A bullet of mass m = M/2 traveling with a horizontal velocity v = 9sqrt(g*L) collides with the ball, What is the velocity of the ball-bullet system
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