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Driving along a crowded freeway, you notice that it takes a timet to go from one mile marker to the next. When youincrease your speed by 5.5 mi/h, the timeto go one mile decreases by 13 s. What was your original speed?mi/h
a point charge q lies at the center of an uncharged hollow conducting spherical shell of inner radius rin and outer
The total electric field consists of the vector sum of two parts. One part has a magnitude of E1 = 1200 N/C and points at an angle ?1 = 35o above the +x axis. Find the magnitude and direction of the total field
A lamp which is 9.0 cm tall is in front of a concave mirror which has a focal length of 53.0 cm. (a) How tall is the lamp's image if the lamp is a distance of 26.5 cm from the mirror (include sign if negative)
1. having already defined center of gravity in the laboratory exercise question why does the center of gravity move in
A 54.6 g sample of a conducting material is all that is available. The resistivity of the material is measured to be 1.18×10-7 ?m and the density is 7.82 g/cm3. What length is required
In 1992, David Engwall of California used a slingshot to launch at 62 g dart. The dart traveled a distance of 477 m (almost 5 football fields). how far was the slingshot stretched
Superman attempts to drink water through a very long straw.With his great strength he achieves maximum possible suction. Find the maximum height through which he can lift the water
At which wavelengths (or energies) will you observe lines in infrared absorption (a phonon absorbs a photon) and raman scattering spectra? The temperature is 300 k. raman scattering is excited with a cw Argon laser at 514.5 nm.
A disk of radius 10 cm, initially at rest, begins rotating about its axis with a constant angular acceleration of 8.2 rad/s2. compute the angular velocity of the disk
in a performance test each of two cars takes 9.3 s to accelerate from rest to 25 ms. car a has a mass of 1415 kg and
An empty parallel plate capacitor is connected between the terminals of a 15.6-V battery and charges up. The capacitor is then disconnected from the battery, and the spacing between the capacitor plates is doubled.
When a man stands on his scale, it reads 92.6 kg. when hepulls down on a chin-up bar installed over the scale, the reading decreases to 75.1 kg. what is the magnitude of the force he exerts on the chin-up bar?
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