What is the total energy of an electron moving with a speed of 0.950c? (c = 3.0 × 108 m/s, mel = 9.11 × 10-31 kg)
A) 2.6 × 10-13 J
B) 8.2 × 10-14 J
C) 1.1 × 10-13 J
D) 1.2 × 10-14 J
A
You might also like to view...
Radioactive Decay: Two radioactive isotopes, X and Y, both decay to stable products. The half-life of X is about a day, while that of Y is about a week. Suppose a radioactive sample consists of a mixture of these two nuclides. If the mixture is such that the activities arising from X and Y are initially equal, then a few days later the activity of the sample will be due
A. predominantly to Y. B. predominantly to X. C. entirely to Y. D. to X and Y equally.
Double-Slit Interference: In a two-slit experiment using coherent light, the distance between the slits and the screen is 1.10 m, and the distance between the slits is 0.0400 mm. If the second order bright fringe is measured to be 4.20 cm from the centerline on the screen, what is the wavelength of light?
A. 200 nm B. 381 nm C. 401 nm D. 620 nm E. 763 nm
Extrusive definition
What will be an ideal response?
All the following statements about known extrasolar planets are true. Which one came as a surprise to scientists who expected other solar systems to be like ours?
A) Some of the planets orbit their star more closely than Mercury orbits the Sun. B) Most of the planets are quite massive—much more like Jupiter than like Earth. C) Most of the planets orbit stars that are quite nearby compared to the scale of the entire Milky Way Galaxy. D) In some cases, we've found more than one planet orbiting the same star.