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The space between the plates is filled with a dielectric whose dielectric constant is 1.8. What is the potential difference between the plates when the charge on the capacitor plates is 4.2mu C ? Ca
The electric force between two charged particles becomes weaker with increasing distance. Suppose instead the electric force were independent of distance .
A 15 g lead bullet traveling at 240m/s passes through a thin wall and emerges at a speed of 160m/s . If the bullet absorbs 54% of the heat generated, what will be the temp. rise of the bullet?
The damping force on the motion of the mass is proportional to the instantaneous speed of the mass, and is equal to 80 N when the speed is 2 m/s. Find the frequency fr at which resonance occurs.
A long pipe of outer radius 3.80 cm and inner radius 3.23 cm carries a uniform charge density of 6.22 mC/m3. Using Gauss\'s law and assuming the pipe is sufficiently long to consider it infinitely
A tire is filled with air at 22oC to a gauge pressure of 240 kPa. After driving for some time, if the temperature of air inside the tire is 45oC, what fraction of the original volume of air must be
A box-shaped wood stove has dimensions of 0.75 m x 1.2 m x 0.40 m an emissivity of 0.81, and a surface temperature of 210 degree C. Calculate its rate of radiation into the surrounding space. Pleas
A two-stage missile is fired vertically from rest with acceleration as shown in the graph. In 15 sec, the first stage, A, burns out and the second stage, B, ignites. How fast is the missile moving a
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?