A66.2 kg ice skater moving to the right with a velocity of 2.47 m/s throws a 0.136 kg snowball to the right with a velocity of 31.4 m/s relative to the ground. what is the velocity of the ice skater after throwing the snowball? disregard the friction between the skates and the ice.

Asimply means that over time there was some sort of change.

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.

Two resistors r1 and r2 may be connected either in series or parallel across an ideal battery with emf ε. we desire the rate of energy dissipation of the parallel combination to be 8.75 times that of the series combination. if r1 = 105 ω, what are the (a) smaller and (b) larger of the two values of r2 that result in that dissipation rate?