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To facilitate traffic flow, many stoplights now have a sensing system based on inductance to determine if a car is waiting at a red light. If that is the case, the light is then switched to green.
Using the Internet, write a paragraph explaining how the system works.
If linear momentum is conserved when there is no external force applied, how is angular momentum conserved
Light of wavelength 480nm is incident on a metallic surface with a resultant photoelectric stopping potential of .55V. What is the work function of the metal
An instrument package B is placed on the shaking table C as shown. The table is made to move horizontally in simple harmonic motion with a frequency of 3 Hz.
To demonstrate the tremendous acceleration of a top fuel drag racer, you attempt to run your car into the back of a dragster that is "burning out" at red light before the start of a race. (Burning out means spinning the tires at high speed to heat..
A moth at about eye level is 11 cm in front of a plane mirror; you are behind the moth, 25 cm from the mirror. What is the distance between your eyes
The radial distance from the center of a centrifuge to a sample is 6m. You would like to subject the sample to a normal acceleration of 100g's. What speed of rotation in RPM is needed? If you want the centrifuge to reach this rotational speed from re..
A singly charged ion of 7Li (an isotope of lithium) has a mass of 1.16×10?26kg. What is the radius of the ion's path in the magnetic field
An alpha particle (charge +2e) moves with velocity v = 5.0i - 3.0j in a magnetic field B = -4.0i + 2.5j, What is the magnetic force on the alpha particle
Chiana is stalking a fly of mass 0.10 g, but the fly gets caught in a spider's web. What is the value of the effective spring stiffness constant k for the web
Calculate the number of liters of water a human drinks in a lifetime, suppose a lifetime of 72 years and consumption of eight 8 ounce glasses of water a day
Arranged on the floor are five concrete blocks, each 28.4kg and 0.265m tall. What is the minimum work required to stack all five vertically
A uniform ladder of mass (m) and length (L) leans against a frictionless wall. If the coefficient of static friction between the ladder and the ground is 0.51, what is the minimum angle (theta) between the ladder and the floor at which the ladder wil..
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