6 -The half -life of a given nuclear disintegration A B A. depends on the initial...
Question:
6 -The half -life of a given nuclear disintegration A → B
A. depends on the initial number of A atoms
B. depends on the initial number of B atoms
C. is an exponentially increasing function of time
D. is an exponentially decreasing function of time
E-none of the above
7. Of the three common types of radiation (alpha, beta, gamma) from radioactive sources, electric charge is carried by:
A. only beta and gamma
B. only beta
C. only alpha and gamma
D. only alpha
E. and beta only alpha
8.An alpha particle is
A.a helium atom with two electrons removed
B. an aggregate of two or more electrons
C. a hydrogen atom
D. the ultimate unit of positive charge
E. sometimes negatively charged
9 .A beta particle is
A. a helium nucleus
B.an electron or a positron
C. a radioactive element
D. any negative particle
E. a hydrogen atom
10.Which expression correctly describes the radioactive decay of a substance whose half -life is T?
A.N(t)= N0e−(t ln 2)/T
B. N(t)= N0e−t/T
C. N(t)= N0e−tT
D. N(t)= N0e−tT ln 2
E. N(t)= N0e−t/T ln 2
Principles of heat transfer
ISBN: 978-0495667704
7th Edition
Authors: Frank Kreith, Raj M. Manglik, Mark S. Bohn