Which of these elements had to be made in a supernova explosion?
a) calcium
b) uranium
c) oxygen
Ans: b) uranium
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A car starts from rest and accelerates with a constant acceleration of 1.00 m/s2 for 3.00 s. The car continues for 5.00 s at constant velocity. How far has the car traveled from its starting point?
A) 24.0 m B) 9.00 m C) 19.5 m D) 4.50 m E) 15.0 m
The y-component of the electric field of an electromagnetic wave traveling in the +x direction through vacuum obeys the equation Ey = (375 N/C) cos[kx - (2.20 × 1014 rad/s)t]. (c = 3.0 × 108 m/s)
(a) What is the largest that the x-component of the wave can be? (b) What is the largest that the z-component of the wave can be? What will be an ideal response?
What electric charge is characteristic for an ion of S?
a. 6+ b. 0 c. 2– d. 2+
If the momentum of an electron is 1.53 MeV/c, what is its kinetic energy?
A. 1.53 MeV B. 1.02 MeV C. 1.44 MeV D. 1.10 MeV E. 2.59 MeV