Physics Electrostatics Level: Misc Level
When a stick of some unknown material is rubbed with a cloth, the stick becomes positively charged with a charge of 3uC, Where did this charge come from/ Did the total charge of the universe change when the stick was rubbed?
Physics Electrostatics Level: Misc Level
Object 1 has charge +5c and Object 2 has a charge -3 e. If the two object are separated by 0.20 meters, calculate the magnitude of the electrical force between them.
Physics Electrostatics Level: Misc Level
Sketch the electric field lines near two isolated and equal A.) positive point charges and B.) negative point charges. Include arrowheads to show the field directions.
Physics Wave Optics Level: Misc Level
A glass plate (n=1.60) is covered with a thin, uniform layer of oil (n=1.16).A light beam of variable wavelength from air is incident normally on the oil surface. Observation of the reflected beam shows destructive interference at 450.0 nm and constructive interference at 675.0 nm. From this information, calculate the thickness of the oil film.
Physics Wave Optics Level: Misc Level
A beam containing light of wavelengths lambda1 and lambda2 is incident on a set of parallel slits. Inthe interference pattern,thefourth bright line of the lambda1 light occurs at the same position as the sixth bright line of the lambda2 light. If lambda1 is known to be 554 nm, what is the value of lambda2?
Physics Wave Optics Level: Misc Level
A beam of light of wavelength 562 nm passes through two closely spaced glass plates, as shown in the figure below.For what minimum nonzero value of the plate separation, d, will the transmitted light be bright?
Physics Wave Optics Level: Misc Level
Light of wavelength 489 nm falls on two slits spaced 0.287 mm apart. What is the required distance from the slits to a screen if the spacing between the first and second dark fringes is to be 3.24 mm?
Physics Wave Optics Level: Misc Level
A very thin sheet of plastic (n=1.55) covers one slit of a double-slit apparatus illuminated by 615 nm light. The center point on the screen, instead of being a maximum, is dark. What is the (minimum) thickness of the plastic?
Physics Wave Optics Level: Misc Level
What is the minimum thickness of a soap film (n=1.39) that would appear black if illuminated with 482 nm light?Assume there is air on both sides of the soap film.
Physics Wave Optics Level: Misc Level
How wide is the central diffraction peak on a screen 2.50 m behind a 0.0315 mm wide slit illuminated by 593 nm light?
Physics Wave Optics Level: Misc Level
Monochromatic light falls on two very narrow slits 0.0356 mm apart. Successive fringes on a screen 5.22 m away are 5.68 cm apart near the center of the pattern. What is the wavelength of the light?
Physics Wave Optics Level: Misc Level
A person driving at v=16.6 m/s crosses the line connecting two radio transmitters at right angles, as shown in the figure below.The transmitters emit identical signals in phase with each other, which the driver receives on the car radio. When the car is at point A, L1= 440 m and L2= 141 m away from the transmitters, the radio picks up a maximum net signal. What is the longest possible wavelength of the radio waves?
Physics Rotational Mechanics Level: Misc Level
A rod of length L is lying on the y-axis. If the linear density of the rod is (y)=Ay2, determine (a)the center of mass of the rod
(b) the moment of inertia about the center of mass and (c) the instaneous angular acceleration that would result if a force F (=Fi ̂) were applied to the lower tip of the rod.
Physics Rotational Mechanics Level: Misc Level
The marble rolls down a track and around a loop-the-loop of radius R. the marble has mass m and radius r (i.e; I= 2/5 mr2). That minimum height h must the track have for the marble to make it around the loop-the-loop without falling off?
Physics Work,Power & Energy Level: Misc Level
A 3250-kg aircraft takes 12.5 min to achieve its cruising altitude of 10.0 km and cruising speed of 850 km/h. If the plane,s engines deliver,1500 hp of power during this time, what is the efficiency of the engines (neglecting air resistance)?
