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Chapter 1: Q48P (page 11)
The common Eastern mole, a mammal, typically has a mass of , which corresponds to about of atoms. (A mole of atoms is.) In atomic mass units (u), what is the average mass of the atoms in the common Eastern mole?
The average mass of the atoms in the common Eastern mole is.
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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: The head of a rattlesnake can accelerate at 50 m/s2in striking a victim. If a car could do as well, how long would it take to reach a speed of 100 km from rest?
Question: The sport with the fastest moving ball is jai alai, where measured speeds have reached 303 km/hr. If a professional jai alai player faces a ball at that speed and involuntarily blinks, he blacks out the scene for 100 ms. How far does the ball move during the blackout?
Gold, which has a density of, is the most ductile metal and can be pressed into a thin leaf or drawn out into a long fiber. (a) If a sample of gold, with a mass of 27.63 g, is pressed into a leaf of 1.000 碌m thickness, what is the area of the leaf? (b) If, instead, the gold is drawn out into a cylindrical fiber of radius 2.500 碌m, what is the length of the fiber?
Figure 28-26 shows crossed uniform electric and magnetic fields and , at a certain instant, the velocity vectors of the 10 charged particles listed in Table 28-3. (The vectors are not drawn to scale.) The speeds given in the table are either less than or greater than (see Question 5). Which particles will move out of the page toward you after the instant shown in Fig. 28-26?
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