How are Earth and Uranus different in their surface composition? (2 points) 1. Earth has a gas and rock surface, and Uranus has a gas surface.
2. Earth has a gas surface, and Uranus has liquid surface.
3. Earth has a solid rock surface, and Uranus has a gas surface.
4. Earth has a solid rock surface, and Uranus is made of gas and rock.

What are the starting materials for nuclear fission? two small nuclei two large nuclei a neutron and a large nucleus a neutron and a small nucleus

Consider each of the electric- and magnetic-field orientations given next. in each case, what is the direction of propagation of the wave? a)\vec ein the +xdirection,\vec bin the +ydirection. choose+ x direction- x direction+ y direction- y direction+ z direction- z direction b)\vec ein the -y direction,\vec bin the +x choose+ x direction- x direction+ y direction- y direction+ z direction- z direction c)\vec ein the +z direction,\vec bin the -x direction. choose+ x direction- x direction+ y direction- y direction+ z direction- z direction d)\vec ein the +y direction,\vec bin the -z direction. choose+ x direction- x direction+ y direction- y direction+ z direction- z direction

Asimple electrochemical cell contains two electrodes.