A 10.0 kg block is released from point A in the figure. The track is friction- less except for the portion BC, of length 6 m. The block travels down the track, hits a spring of force constant k
*= 1,971 N/m, and compresses it 0.4 m from its equilibrium position before coming to rest
momentarily. Determine the coefficient of kinetic friction between surface BC and block.
Take g=9.81. Your result must contain at least two figures after the decimal point.
(Height of A is 3 m)

Examine the equation. 23490th→23088ra+42he what kind of barrier would you need to block the radioactive particles from this reaction? a. a piece of paper b. a sheet of aluminum foil c. a two-inch block of lead d. a solid concrete block

Two point charges are separated by a certain distance. how does the strength of the electric field produced by the first charge, at the position of the second charge, change if the second charge is doubled? a. the field does not change b. the field strength decreases by half. c. the field strength doubles d. the field strength quadruples

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.