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The primary coil of a transformer makes 40 turns around the iron core and the secondary coil of that transformer makes 600 turns. If the primary voltage is 120V, what is the secondary voltage (in V)?
we need to know how to find the element of an unknown nucleus. we know that it is a most common isotope of a single
A 78 person sits on a 3.6 chair. Each leg of the chair makes contact with the floor in a circle that is 1.0 in diameter. Find the pressure exerted on the floor by each leg of the chair
A flask is filled with 1.58 L (L = liter) of a liquid at 100 °C. When the liquid is cooled to 13.3 °C, What is the coefficient of volume expansion of the liquid
A ferris wheel at a local carnival has a radius of 20.0 m and it completes one revolution in 9.60 seconds. What is the speed of a point on the edge of the wheel
A plane mirror and the concave mirror (f = 8.70 cm) are facing each other and are separated by a distance of 23.0 cm. An object is placed between the mirrors and is 11.5 cm from each mirror.
A battery is connected in series with a R = 0.31 ? resistor and an inductor, as shown in the figure below. The switch is closed at t = 0. The time constant of the circuit is ? = 0.20 s, and the maximum current in the circuit is I = 7.9 A.
A horizontal magnetic field of 1.0 x 10-4 T is at an angle of 30o to the direction of the current in a straight wire 75 cm long. If the wire carries a current of 15 A
If you know the mass of a star and a planet's radius and speed at perihelion (closest approach to the star), What is its speed and distance from the Sun at aphelion
An 840 kg roller coaster is launched from a giant springof constant k = 31,000 N/m on a frictionless loop-the-loop track ofradius 6.2 m. Calculate the minimum compression of the spring
A car traveling on a flat (unbanked), circular track accelerates uniformly from rest with a tangential acceleration of 2.20 m/s2. The car makes it one quarter of the way around the circle before it skids off the track. From these data, determine the ..
a 3250 kg open railroad car coasts along with a constant speed of 10.6ms on a level track. snow begins to fall
A heater runs on an AC voltage of 120 V and draws a power of 25 W. how much current would flow through the heater
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