The various isotopes of an element all have
a. the same number of protons but different numbers of neutrons.
b. the same total number of neutrons and protons.
c. the same number of neutrons but different numbers of protons.
d. the same number of neutrons and the same number of protons.
a
You might also like to view...
What is the kinetic energy of an electron that passes undeviated through perpendicular electric and magnetic fields if E = 4.0 kV/m and B = 8.0 mT?
A. 0.65 eV B. 0.71 eV C. 0.84 eV D. 0.54 eV E. 1.4 eV
When we consider a thin horizontal layer of the atmosphere, of thickness dy, of area A, with pressure P on the bottom, with an average mass m per molecule, and nV molecules per unit volume, the magnitude of the difference of the pressure at the top and bottom of the layer is given by dP =
A. mgdy. B. mgnVdy. C. mgAdy. D. mgnVAdy. E. mgnVAPdy.
Why aren't small asteroids spherical in shape?
A) Small asteroids have odd shapes because they were all chipped off larger objects. B) Large asteroids became spherical because many small collisions chipped off pieces until only a sphere was left; this did not occur with small asteroids. C) The strength of gravity on small asteroids is less than the strength of the rock. D) Large asteroids were once molten and therefore became spherical, but small asteroids were never molten.
The energy per unit volume in an electromagnetic wave is
A) equally divided between the electric and magnetic fields. B) mostly in the electric field. C) mostly in the magnetic field. D) all in the electric field. E) all in the magnetic field.