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Chapter 1: 40P (page 1)
A can of sardines is made to move along an x axis from to by a force with a magnitude given by with x in meters and Fin newtons. (Here exp is the exponential function.) How much work is done on the can by the force?
The work done on the can by the force is, 0.21 J.
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Figure 21-14 shows two charged particles on an axis. The charges are free to move. However, a third charged particle can be placed at a certain point such that all three particles are then in equilibrium. (a) Is that point to the left of the first two particles, to their right, or between them? (b) Should the third particle be positively or negatively charged? (c) Is the equilibrium stable or unstable?
Question: Harvard Bridge, which connects MIT with its fraternities across the Charles River, has a length of 364.4 Smoots plus one ear. The unit of one Smoot is based on the length of Oliver Reed Smoot, Jr., class of 1962, who was carried or dragged length by length across the bridge so that other pledge members of the Lambda Chi Alpha fraternity could mark off (with paint) 1-Smoot lengths along the bridge. The marks have been repainted biannually by fraternity pledges since the initial measurement, usually during times of traffic congestion so that the police cannot easily interfere. (Presumably, the police were originally upset because the Smoot is not an SI base unit, but these days they seem to have accepted the unit.) Figure 1-4 shows three parallel paths, measured in Smoots (S), Willies (W), and Zeldas (Z). What is the length of 50.0 Smoots in (a) Willies and (b) Zeldas?
Figure 1-4Problem 8
Question: Figure shoes four isotropic point sources of sound that are uniformly spaced on an x axis. The sources emit sound at the same wavelength and same amplitude and they emit in phase. A point, is shown on the y axis. Assume that as the sound waves travel to, the decrease in their amplitude is negligible. What multiple of toP if distance din the figure is
A certain capacitor is charged to a potential difference. If you wish to increase its stored energy by 10%, by what percentage should you increase?
Question:Earth has a mass of . The average mass of the atoms that make up Earth is 40 u. How many atoms are there in Earth?
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