Where did Thomson's model place electrons in the atom?
a. Studded throughout a positively-charged material.
b. Rotating around a positively-charged core.
c. Uniformly distributed in the atom.
d. Clustered in the center of a positively-charged sphere.
e. At the two magnetic poles of the atom.
a
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An athlete competing in long jump leaves the ground with a speed of 9.14 m/s at an angle of 35.0° above the horizontal. What is the length of the athlete's jump?
A) 0.876 m B) 8.01 m C) 12.0 m D) 16.8 m E) 4.01 m
Population II stars I. are primarily found in the disk of the galaxy. II. contain more heavy metals than population I stars. III. are primarily old low-mass stars. IV. are located in globular clusters
a. III & IV b. I & II c. II d. IV e. I, II, & III
A jet plane travels around the world at 2 000 mi/hr (894 m/s). Two accurate atomic clocks measure the times of flight, one on board the plane and the second on Earth. If it takes 12 hours to complete the journey, what will the time difference (in ?s) be?
a. 0.75 b. 0.50 c. 0.25 d. 1.0 e. 0.19
A charge of +80 ?C is placed on the x axis at x = 0 . A second charge of ?50 ?C is placed on the x axis at x = 50 cm. What is the magnitude of the electrostatic force on a third charge of 4.0 ?C placed on the x axis at x = 30 cm?
a. 13 N b. 77 N c. 39 N d. 25 N e. 45 N