In radioactive decay, the changed nucleus after decay is referred to as the
A) daughter isotope
B) parent isotope
C) mother-in-law isotope
D) progenitor isotope
A
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Consider the following procedural steps:
(1) ground the electroscope (2) remove the ground from the electroscope (3) touch a charged rod to the electroscope (4) bring a charged rod near, but not touching, the electroscope (5) remove the charged rod To charge an electroscope by induction, use the sequence: A) 1, 4, 5, 2 B) 4, 1, 2, 5 C) 3, 1, 2, 5 D) 4, 1, 5, 2 E) 3, 5
A person has a thermal conductivity of 0.18 W/m·K between his inner core and his skin with an effective shell thickness of 1.30 cm between his core and skin. If his inner core is at the normal 98.6°F, and his skin has a surface area of 1.62 m2, what will be his rate of loss of thermal energy due to conduction through his skin if his skin temperature is 28.3°C?
a. 150 W b. 158 W c. 316 W d. 195 W e. 254 W
A 0.150-m-radius grinding wheel starts at rest and develops an angular speed of 12.00 rad/s in 7.80 s. What is the average tangential acceleration of a point on the wheel's edge?
a. 0.231 m/s2 b. 1.54 m/s2 c. 10.3 m/s2 d. 14.0 m/s2
A 3.00-kg block of silicon at 60.0°C is immersed in 6.00 kg of mercury at 20.0°C. What is the entropy increase of this system as it moves to equilibrium?
The specific heat of silicon is 0.17 cal/(g?K) and the specific heat of mercury is 0.033 cal/(g?K). A) 8.8 × 10-1 J/K B) 4.8 J/K C) 6.9 J/K D) 5.2 × 10-2 J/K E) -0.46 J/K