Starting with AC-227, assume the following sequence of decays occur: (1st) ? decay; then (2nd) ?- decay; and finally (3rd) alpha decay. Determine the correct isotopic product after each process has occurred sequentially
What will be an ideal response?
(1 ) Fr-223; (2 ) Ra-223; (3 ) Rn-219
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Bullet G is dropped, from rest, at the same time that another bullet H is fired horizontally from a rifle. If both bullets leave from the same height above the ground, then
A) bullet G hits the ground before bullet H does. B) both bullets hit the ground at the same time. C) bullet H hits the ground before bullet G does. D) not enough information is given to compare when they hit.
Two long parallel wires lie in the xz plane. One wire passes through the point (?2 m, 0, 0) and the other through the point (+2 m, 0, 0). The wires carry equal currents in the positive z direction. 1 . The magnetic field at (?3 m, 0, 0) is in the negative y direction. 2 . The magnetic field at (?1 m, 0, 0) is in the positive y direction. 3 . The magnetic field at (+1 m, 0, 0) is in the
positive y direction. 4 . The magnetic field at (+3 m, 0, 0) is in the negative y direction. a. 1 and 2 are correct. b. 1 and 4 are correct. c. 2 and 3 are correct. d. 3 and 4 are correct. e. None of the above are correct.
A concave spherical mirror with a radius of 20 cm creates a real image 30 cm from the mirror. How far is the object from the mirror?
A) 50 cm B) 20 cm C) 15 cm D) 7.5 cm E) 5.0 cm
Why does Jupiter have several distinct cloud layers?
A) Different gases are present at different altitudes in Jupiter's atmosphere.
B) Clouds form randomly, so on average there are always several layers.
C) Different layers represent the various regions where the temperature is cool enough for liquid water to condense.
D) Winds prevent clouds from forming at some altitudes, so we see clouds only at the other altitudes.
E) Different layers represent clouds made of gases that condense at different temperatures.