How many mg of uranium were in the original rock specimen
Suppose that a rock contains 0.539 mg of 206Pb. If the current rock specimen contains 2.035 mg of 238U, how many mg of 238U were in the original rock specimen?
Choose one answer.
a. 0.539 mgb. 0.623 mgc. 2.658 mgd. 2.035 mg
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When a clean surface of Sodium metal is exposed to blue light l = 486 nm, electrons are emitted. If the work function is 2.26 ev , What is the Kinetic energy of the emitted electrons?
Describe the structure of church membership and the requirements for leadership that are presented in the Pastoral Letters. How do these letters promote different views of the church than found in Pauline theology?
What volume and mass of steam at 100.°C and 1.00 atm would, during condensation, release the same amount of heat as 100. cm3 of liquid water during freezing?
A 90-kg firefighter slides down a fire pole. The average frictional force exerted on him by the pole has a magnitude of 795 N, and his speed at the bottom of the pole is 3.8 m/s. How far did he slide down the pole?
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A thin 320 g disk with a diameter of 5.20 cm rotates about an axis through its center with 0.705 J of kinetic energy. What is the speed (in m/s) of a point on the rim?
In the afternoon, the decibel level of a busy freeway is 80 dB with 100 cars passing a given minute. Late at night, the traffic flow is only 5 cars per minute. What is the late-night decibel level?
A 7.0 kg bowling ball moves at 2.25 m/s. How fast must a 2.00 g Ping-Pong ball move so that the two balls have the same kinetic energy?
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