Ricardo, mass 85 kg, and carmelita, who is lighter, are enjoying lake merced at dusk in a 20 kg canoe. when the canoe is at rest in the placid water, they exchange seats, which are 3.0 m apart and symmetrically located with respect to the canoe's center. ricardo notices that the canoe moved 35 cm relative to a submerged log during the exchange and calculates carmelita's mass, which she has not told him. what is it?

Ablock of mass m = 2.5 kg is attached to a spring with spring constant k = 740 n/m. it is initially at rest on an inclined plane that is at an angle of theta= 26 with respect to the horizontal, and the coefficient of kinetic friction between the block and the plane is uk = 0.17. in the initial position, where the spring is compressed by a distance of d = 0.16 m, the mass is at its lowest position and the spring is compressed the maximum amount. take the initial gravitational energy of the block as zero. the block's initial mechanical energy is 9.472 j.b. if the spring pushes the block up the incline, what distance l in meters will the block travel before coming to rest? the spring remains attached to both the block and the fixed wall throughout its motion.

The junction rule describes the conservation of which quantity? note that this rule applies only to circuits that are in a steady state.

If the moon rises at a given location at 6: 00 p.m. today, about what time will it rise tomorrow night?