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In figure, calculate the X-ray intensity, as a function of the incident intensity I_o, that reaches the film for each of the three X-ray beams. The dark-shaded area represents bone and the light-shaded area represents tissue. The linear attenuation coefficients at the effective X-ray energy of 68 KeV are 10 and 1 cm^-1 for bone and tissue, respectively.
A 150 pF capacitor is charged to a potential difference of 64 V, and the charging battery is disconnected. The capacitor is then connected in parallel with a second (initially uncharged) capacitor. If the measured potential difference across the firs..
A ship's mast reaches to a height of 15 meters above the surface of a 10-meter- deep lake. When the sun is 30 degrees above the horizon, how long will the shadow of the mast be on the bottom of the lake?
A guitar string has a fundamental f=500 Hertz, find the frequency that will set string into resonant vibration
A 144-g cricket ball moving 28.0 m/s strikes a stationary 5.25-kg brick resting on small rollers so it moves without significant friction. What is the cricket ball's speed after the collision
A 6.00 V lantern battery is connected to a 10.5 (ohm) lightbulb, What is the internal resistance of the battery
A radar has a resolving power of 30 m at a range of 1.0km. What is the minimum width of its antenna if its operating frequencyis 9500 MHz
A point charge with Q1=2e-7 Coulombs is placed at the point y=-0.05 meters on the negative y-axis and another charge Q2 = 2e-7 Coulombs is placed at the point y=0.05 meters on the positive y-axis. Find the electric field, magnitude and direction, at ..
A single force acts on a 2.8 kg particle-like object in such a way that the position of the object as a function of time is given by x = 4.2t - 5.0t2 + 1.1t3, Find the work done on the object by the force
a bird is flying directly toward a stationary bird-watcher and emits a frequency of 1250 hz. the bird-watcher however
If you were to take a 60.0 cm long steel bar, and heated it to the point that it would try to expand by 0.50 mm,what is the pressure you would need to apply, to keep it from expanding
a 10.5 uf capacitor is fully charged across a 18.0 v battery. the capacitor is then disconnected from the battery and
How much charge can be placed on a capacitor with air between the plates before it breaks down if the area of each plate is 3.00 cm2
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