Amarble is flicked off the edge of a table. the motion of the marble follows a parabolic path.

which is true about the motion of this marble?

a.
no continuous forces are acting.

b.
two continuous forces are acting on the marble.

c.
only one continuous force is acting on the marble.

d.
two instantaneous forces are acting on the marble.

Adouble-slit experiment is performed with light of wavelength 600 nm. the bright interference fringes are spaced 1.8 mm apart on the viewing screen.what will the fringe spacing be if the light is changed to a wavelength of 400 nm? ?

Sawyer is studying diffraction. he draws a diagram of a plane wave to show how light waves travel. which best describes sawyer’s error? the wave fronts should be perpendicular to the direction in which the waves move. the arrow showing the direction of movement of the waves should be pointing to the left. the arrow showing the direction of movement of the waves should be pointing downward. the wave fronts should be both parallel and perpendicular to the direction in which the waves move.

Place me with this question is my last question