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A charge of 18 nC is uniformly distributed along a straight rod of length 3.0 m that is bent into a circular arc with a radius of 2.5 m. What is the magnitude of the electric field at the center of
A 1.0cm -tall candle flame is 2.0m from a wall. You happen to have a lens with a focal length of 42cm . (a) How many places can you put the lens to form a well-focused image of the candle flame on t
What is the average speed of a piece of the slinky as a complete wave pulse passes?
F1 = (1.6,-4.6) and F2 = (0.3,-0.8) where all components are in newtons. What angle does the vector F1 + F2 make with the positive x-axis? The angle is measured counterclockwise from the positive x
A rock thrown with speed 7.50 and launch angle 30.0 (above the horizontal) travels a horizontal distance of = 19.5 before hitting the ground. From what height was the rock thrown?
What is the maximum angle of incidence for which a light ray can emerge into the air above the water?
A light with wavelength 411nm is shined on 15cm of water with 850nm of oil on top of it. The oil has an index of refraction of 1.4 and the water has an index of refraction of 1.33. How much nanomete
A slide projector needs to create a 98-cm-high image of a 2.0-cm-tall slide. The screen is 300cm from the slide. Assume that the projector has a thin lens. (a) What focal length does the lens need?
A 1.0-cm-tall object is 20cm in front of a converging lens that has a 10cm focal length. Use ray tracing to find the position and height of the image. To do this accurately, use a ruler or paper wit
A microphone is put at some distance on the axis in front of them and register a minimum intensity. One of the speakers are then moved and are distanced 30 cm this time. The microphone registers a m
The place you get your hair cut has two nearly parallel mirrors 7.0m apart. As you sit in the chair, your head is 1.5m from the nearer mirror. Looking toward this mirror, you first see your face and
A swimmer looks upward from the bottom of a 3.5--deep swimming pool. The end of the diving board is directly above him, 2.0 above the water's surface. How far from the swimmer does the board appear
A point source of light illuminates an aperture 4.00 away. A 18.0 -wide bright patch of light appears on a screen 2.00 behind the aperture. How wide is the aperture in cm?
The lighted disk illuminates the screen, but there's a shadow in the center due to the black disk. What is the diameter of the completely dark part of this shadow?
At what point along the line connecting the two charges is the net electric field due to the two charges equal to zero? The electric field is zero at a point (blank) m from 0.510 nC.
An object is 30cm in front of a converging lens with a focal length of 10cm . (a) Use ray tracing to determine the location of the image. (b) Is the image upright or inverted? (c) Is the image real
Find the focal length of the lens that produces the image described in the problem introduction using the thin lens equation. Express your answer in centimeters, as a fraction or to three significan
Charge is uniformly distributed around a ring of radius R and the resulting electric field is measured along the ring's central axis (perpendicular to the plane of the ring). At what distance from
A 1-cm-thick layer of water stands on a horizontal slab of glass. A light ray in the air is incident on the water 55 degrees from the normal. (1) After entering the glass, what is the ray's angle f
Suppose a spherical metallic satellite 0.7 m in diameter accumulates 2.2 µC of charge in one orbital revolution. (a) Find the resulting surface charge density.
An object is 15 in front of a diverging lens with a focal length of 10 . A. Use ray tracing to determine the location of the image in cm B. Is the image upright or inverted? C . Is the image real o
A concave cosmetic mirror has a focal length of 22 . A 4.0 -long mascara brush is held upright 11 from the mirror. A. Use ray tracing to determine the location of its image in cm
The illumination lights in an operating room use a concave mirror to focus an image of a bright lamp onto the surgical site. One such light has a mirror with a focal length of 12.0 . A. Use ray trac