Jack and jill are maneuvering a 3400 kg boat near a dock. initially the boat's position is $\langle 3, 0, 4 \rangle$ m and its speed is 1.8 m/s. as the boat moves to position $\langle 4.5, 0, 5 \rangle$ m, jack exerts a force $\langle -340, 0, 300 \rangle$ n and jill exerts a force $\langle 130, 0, 320 \rangle$ n. how much work does jack do?

myth. it was once thought that animals, including cats and dogs, could only see in black and white. however, scientists have proven this to be a myth. in all animals, including humans, the perception of colour is determined by the presence of cells in the eye called cone photoreceptors.

snell's law

refractve index = sin incidence / sin refraction

its lower due to the doppler effect.: apex