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an object is 18cm in front of a adiverging lens that has a focal length of -12cm. how far in front of the lens should the object be placed so that the size of its image is reduced by a factor of 2?
If the beam now strikes the top of a building standing directly at the water's edge, find out the height of the building.
A capacitor (capacitance C1) is connected across the terminals of an ac generator. Without changing the voltage or frequency of the generator, a second capacitor (capacitance C2) is added in series with the first one.
The three ropes are tied to a small, very light ring. Two of these ropes are anchored to walls at right angles with tensions T1 = 35 N andT2 = 70 N. What are the magnitude and direction of the tension Tvec3 in third rope.
A series AC circuit contains a resistor, an inductor of 230 mH, a capacitor of 4.30 µF, and a source with ?Vmax = 240 V operating at 50.0 Hz. obtain the phase angle between the current and the source voltage
What is the smallest radius of an unbanked (flat) track around which a bicyclist can travel if her speed is 25 km/h
A spring has a spring constant k = 0.84 N/m. If it is stretched 0.13 m from its equilibrium position, what is the restoring force of the spring
A lighthouse that rises h1 = 43.6 ft above the surface of the water sits on a rocky cliff that extends $d$ = 20.0 ft from its base, as shown in the figure below. A sailor on the deck of a ship sights the top of lighthouse at an angle of $theta$ = 29...
A solid disk rotates in the horizontal plane at an angular velocity of 0.049 rad/s with respect to an axis perpendicular to the disk at its center. what is the angular velocity of the disk
A charged particle m=6g q=-80 c moves in a region of uniform field along a helical path (radius = 3.0 cm, pitch = 9.0 cm) as shown. Illustrate what is the angle among the velocity of the particle and the magnetic field?
An airtight box has a removable lid of area 2.46 × 10-2 m2 and negligible weight. find the magnitude of the force required to pull the lid off the box
A 2.3 L volume of ideal neon gas (monatomic) is at a pressure of 5.7 atmospheres and a temperature of 390 K. find The number of neon atoms in the gas
Briefly describe how the resulting interference pattern will differ for the various types of particles passing through: protons, electrons, neutrinos (mass close to zero) and photons. Assume that the distribution of particle energies is the same f..
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