An electron and a neutron have the same de Broglie wavelength, therefore
A. the electron and neutron have the same kinetic energy but the electron has the higher speed.
B. the electron has a lower speed and smaller kinetic energy.
C. the electron has higher kinetic energy and higher speed.
D. the electron has smaller kinetic energy and higher speed.
C. the electron has higher kinetic energy and higher speed.
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The electric field on a given gaussian surface is determined by all the charged particles in the entire universe. Nonetheless, the net flux of the electric field through that surface only depends on the charged particles inside that surface.
Answer the following statement(s) true (T) or false (F)
Which statement about our current knowledge of elements is FALSE?
A) We now know of more than 110 elements, both natural and man-made. B) 81 stable elements have been found on Earth. C) 10 radioactive elements are also found on Earth. D) We have now produced over 50 radioactive elements not occurring in nature. E) Technetium is found in giant stars, but not yet in nature on the Earth.
The ________ hypothesis is now the most popular to explain the Moon's origin
Fill in the blank(s) with correct word
Most of the dark regions on Mars visible from Earth are:
A) features like the Valles Marineris. B) lava flows from active volcanoes. C) mountainous regions. D) the seasonal growth of vegetation on the planet. E) volcanic planes like the lunar maria.