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Blinking lights in a christmas tree use an RC circuit with a time constant of 5.00 seconds. If the capacitor has C=25.0microfarads, find the value of the resistor R.
The speed of sound in the rod is 16 times the speed of sound in air. A woman, at the other end with her ear close to the rod, hears the sound of the blow twice with a 0.15 s interval between; one so
Two equal resistances are connected in the gaps of a meter bridge. If the resistance in the left gap is increased by 10%, by what percent does the balance-point shift (and in which direction)
The specific heat of a substance varies with temperature according to c(T) = A + BT + CT2. Find the energy required to raise the temperature of a mass m of this substance from T1 and T2. (Use any v
If the conductor is 0.30 m long and a constant current of 7.0 mA flows through it, what force does it experience from a magnetic field that varies spatially from B = 17.0 (i.hat) T to B = 5.0 (i.hat
At a distance of 11 km, a 170 Hz horn, assumed to be a point source, is barely audible. At what distance would it begin to cause pain?
The near point of the person using the microscope is 25.5 and you can assume she can view the image produced with a fully relaxed eye. 1) What is the focal length of the objective? 2) What is the di
A baton twirler is twirling her baton in a horizontal circle at a rate of 2.33 revolutions per second. Calculate the induced EMF between the center and one end of the baton if the magnetic field of
Two long parallel wires are separated by 3.37 cm and carry currents 1.25 A and 3.43 A. Find the magnitude of the magnetic force that acts on a 3.53-m length of either wire.
A short bar magnet placed with its axis at 60 degrees with a uniform external magnetic field of 1.0T experiences a torque of magnitude 5x102 J. What is the magnitude of magnetic moment of the magne
How far was the laser originally from the object in meters? Assume the small angle aprproximation applies.
In a long solenoid, the density of the wire is 180 turns/cm. If the current in the wire is 0.680A, what is the strength of the magnetic field within the solenoid?
Two long, parallel wires carry currents of 0.245 A in the same direction. If the wires are 0.034 m apart, what is the force per unit length between the wires? is the force attractive or repulsive? s
The crew of an enemy space craft attempts to escape from your spacecraft, by moving away from you at 0.281 of the speed of light. But all is ot lost! You launch a space torpedo toward the foe at 0.3
A 513 - uF capacitor is discharged through a resistor, whereby its potential difference decreases from its initial value of 82.9 V to 20.7 V in 4.43 s. Find the resistance of the resistor in kilohms
The near and far points of a person are at 40cm and 250cm respectively. Find the power of the lens he/she shoeld use while reading at 25cm. With this lens on the eye. what maximum distance is clearl
Calculate the magnitude of the force required to give a 0.145-kg baseball an acceleration a=1.00m/s2 in the direction of the baseball's initial velocity when this velocity has a magnitude of 0.900c.
Unpolarized light passes through two polarizers. The inensity of light coming out from the second polarizer is S2=33% of the intensity of te unpolarized light S0. What is the angle between the trans
Soap bubbles can display impressive colors, which are the result of the enhanced reflection of light of particular wavelengths from the bubble's walls. For a soap solution with index of refraction o
A glass lens (nglass = 1.52) has a 139 nm thick anti-reflective film (nfilm = 1.29) on one side. Light, moving through the air, is normally incident on the lens passing through the film. What is the
Measuring distances to high precision is a critical goal in engineering. Numerous devices to exist to perform such measurements, with many involving laser light. Shining light through a double slit
A. Find the frequency in terahertz of visible light with a wavelength of 481 nm in vacuum. B. What is the wavelength in centimeters of electromagnetic microwave radiation whose frequency is 4.99 GHz?
A d-cell flashlight has an emf of 1.50v an internal resistance of 0.12 ohms and a load provided by the resistor R if the total current is 3.5 A what is the terminal voltage of the battery. Show work
Two pieces of optically flat glass (n = 1.50) touch at one edge and a separated by a thin stretched fiber at the opposite edge. Light of wavelength 500 nm is shone from above and 100 dark fringes ar