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The place you get your hair cut has two nearly parallel mirrors 7.0 m apart. As you sit in the chair, your head is 1.0 m from the nearer mirror. Looking toward this mirror, you first see your face and then, farther away, the back of your head. (The mirrors need to be slightly nonparallel for you to be able to see the back of your head, but you can treat them as parallel in this problem.) How far away does the back of your head appear to be? Neglect the thickness of your head. Express your answer using two significant figures.
A 2500 kg truck moving at 10 m/s strikes a car waiting at a traffic light, hooking bumpers. What was the mass of the struck car
You need to make a series ac circuit having a resonance angular frequency of 1550rad/s using a 142 ohm resistor, a 10. microF capacitor, and an inductor. What should be the inductance of the inductor
A 17-kg projectile is fired at an angle of 60° above the horizontal and with a speed of 240 m/s. At the highest point of its trajectory the projectile explodes into two fragments with equal mass, one of which falls vertically with zero initial spe..
When a 5.0 µF capacitor is connected to a generator whose rms output is 28 V, the current in the circuit is observed to be 0.30 A. What is the frequency of the source
A beam of natural light with an irradiance of 330 W/m^2 impinges on the first of two consecutive ideal linear polarizers whose transmission axes are 67.0° apart
An aluminum-alloy rod has a length of 10.008 cm at 16.400°C and a length of 10.020 cm at the boiling point of water. (a) What is the length of the rod at the freezing point of water
When operated on a household 110.0-V line, typical hair dryers draw about 1550 W of power, What is the current in the dryer and What is the resistance of the dryer
Suppose you have a spherical balloon filled with air at room temperature and 1.0 atm pressure; its radius is 18cm, what's the balloon's new radius
A 2cm x 2cm square loop of wire in the xy plane with resistance .010 ohms has one edge parallel to a long straight wire. What is the current in the loop
A 4.00 x 107 kg battleship originally at rest fires a 1200 kg artillery shell horizontally with a velocity of +400 m/s. Calculate the increase in internal kinetic energy
Suppose the flux through a loop changes uniformly from 12 Wb to 18 Wb in 6.50 s. What is the magnitude of the emf induced in the loop
suppose a 29.9-kg child sits 1.27 m to the left of center on the same seesaw as the problem you just solved in the
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