Physics Rotational Mechanics Level: Misc Level
A cylindrical piece of stock 6 in.in diameter rotates in a lathe at 800 rev/min. what is the linear velocity at the surface of the cylinder?
Physics Rotational Mechanics Level: Misc Level
A bucket is hung from a rope that is wrapped many times around a circular drum of radius 60 cm.The bucket starts from rest and is lifted to a height of 20 m in 5 s.
(a) How many revolutions were made by the drum?
(b) What was the average angular speed of the rotaing drum?
Physics Rotational Mechanics Level: Misc Level
An electric motor turns at 600 rpm. What is the angular velocity? What is the angular displacement after 6 s?
Physics Circular Motion Level: Misc Level
A point on the edge of a large wheel of radius 3 m moves through an angle of 37 degrees. Find the length of the are described by the point.
Physics Rotational Mechanics Level: Misc Level
A cable is wrapped around a drum 80 cm in diameter. How many revolutions of this drum will cause an object attached to the cable to move a linear distance of 2 m? What is the angular displacement?
Physics Wave Optics Level: Misc Level
Consider an oil film (n=1.50) on water (n=1.33) and light of wavelength 600 nm in air, incident on the film. The minimum film thickness for constructive interference of the light in air is;
a. 100 nm
b.113. nm
c. 150. nm
d. 200.nm
Physics Wave Optics Level: Misc Level
A convex lens is placed on a flat glass plate and illuminated from above with monochromatic red light. When viewed from above, concentric bands of red and dark are observed. what does one observe at the exact center of the lens whenre the lens and the glass plate are in direct contact?
a. A bright red spotb.
b. A dark spot
c. A rainbow of color
d. A bright spot that is some color other than red
Physics Ray Optics Level: Misc Level
The index of refraction of diamond is 2.42.This means that a given wavelength of light travels
a. 2.42 times faster in air than it does in diamond.
b.2.42 times faster in diamond than it does in air.
c.2.42 times faster in vacuum than it does in diamond.
d.2.42 times faster in diamond than it does in vacuum.
Physics Wave Optics Level: Misc Level
For a beam of light, the direction of polarization is defined as
a. the beam,s direction of travel.
b. the direction of the electric field,s vibration.
c. the direction of the magneticfield,s vibration.
d. the direction that is mutually perpendicular to the electric and magnetic field vectors.
Physics Wave Optics Level: Misc Level
Assuming that h is the wavelength of light in oil, for an oil film on water, constructive interference occurs with the minimum film thickness of;
a.h/4
b.h/2
c.h
d.2h
Physics Wave Optics Level: Misc Level
We have seen that two monochromatic light waves can interfere constructively or destructively,depending on their phase difference. one consequence of this phenomena is
a. the formation of an image by a converging lens,such as the lens in your eye.
b.the colors you see when white light is reflected from a soap bubble.
c. the appearance of a mirge in the desert.
d. a rainbow.
e. the way in which polaroid sunglasses work.
Physics Wave Optics Level: Misc Level
The property of light by which it bends around small objects is called;
a.Dispersion
b. Resolution
c.Diffraction
d.Chromatic Aberration
Physics Misc Topic Level: Misc Level
How much current must be carried by a copper wire 3.00 mm in diameter such that the wire is suspended in the air? The density of copper is 8900 kg/m3.
Physics Magnetism,Magnetic Effects Of Current Level: Misc Level
A current element (length=1.0 cm) lies along the x axis with its center at x=0 and carries a 20-A current in the positive x direction. Consider only the field of this current element and decide which combination of the following statements is correct.
a. The field at (0,0,1.0m) is in the positive z direction.
b. The field at (0,1.0 m,0)is in the negative y direction.
c.The field at (1.0 m,0,0)is zero.
d.The field at (0,0,1.0m) is in the negative y direction.
1.3 and 4
2.1 and 3
3.2 and 4
4.1 and 2
5.None of these
Physics Modern Physics Level: Misc Level
A particle (mass=2.0 mg, charge=-6.0 uC) moves in the positive direction along the x axis with a velocity of 3.0 km/s. It enters a magnetic field of (2.0i+3.0j+4.0k)mT.What is the acceleration of the particle?
a.(36j-27k) m/s2
b.(-36j+27k) m/s2
c.(-24j+18k) m/s2
d.(24j-18k)m/s2
e.(24j-27k)m/s2
