A sailor pulls a boat along the river with a force of 250 N. The rope is held at an angle of 60^circ along the horizontal How much work is done if the sailor pulls the boat 30 m?4. The speed of light in carbon disulfide is 1.84times 10^8m/s Calculate the index of refraction for carbon disulfide? (4 marks)A Question 6 (1 point) Retake question 4) Listen The following wave function represents a travelling wave: y(x,t)=(7.8)/(8.7+(6.3x+5.6t)^2) What is the phase velocity? Your Answer: square square Answer unitsi. On a chessboard a king sits at a position of +12 em from the lower left corner. A knight is +5.0cm from the same corner along the same straight line. What is the displacement from the king to the knight?(3) Draw a picture for full marks The displacement is -7 cm Ad=+12-(+5.0)=Barney and his friends are on a toboggan (with a combined mass of 95 kg) at the top of a 25 m hill. They start down the hill with an initial velocity of 3 m/s What is their starting KE? What is their starting PE? What is their total Mechanical Energy?How fast are they moving at the bottom of the hill?PREV 808182838485868788 NEXT
