As an airplane rises through the atmosphere, machines cause the pressure inside the cabin to decrease. Based on your observations from the Can Crush Lab, why is this change in pressure necessary? A) Air pressure inside the plane should match the air pressure outside the plane.
B) Air pressure inside the plane should be less than the air pressure outside the plane.
C) Air pressure outside the plane should be less than the air pressure inside the plane.
D) Air pressure outside the plane should be more than the air pressure inside the plane.

Which of the following is an example of units for speed

Name two kinds of practical electric pumps.

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