Which pair of vectors below, if summed, would create a state of equilibrium (a resultant of 0i + 0j)?

a. 0i + 0j and 2i − 2j

b. 2i + 2j and 2i − 2j

c. 2i + 2j and -2i − 2j

d. 2i + 0j and 0i + 2j

Explain to someone who knows nothing about fossils the study of invertebrate paleontology and how it scientists understand the history of the earth. be sure your explanation contains a minimum of two complete sentences.

Which branches of natural science include the study of an organism that lived 10 million years ago

Two manned satellites approaching one another at a relative speed of 0.550 m/s intend to dock. the first has a mass of 2.50 ✕ 103 kg, and the second a mass of 7.50 ✕ 103 kg. assume that the positive direction is directed from the second satellite towards the first satellite. (a) calculate the final velocity after docking, in the frame of reference in which the first satellite was originally at rest.(b) what is the loss of kinetic energy in this inelastic collision? (c) repeat both parts, in the frame of reference in which the second satellite was originally at rest. final velocity(d) loss of kinetic energy = ?