atunch7 rand ebmSoogdn5pble5482513506 Back to Message Ch1.serway.Hwsp17s.docx 1

Question

atunch7 rand ebmSoogdn5pble5482513506 Back to Message Ch1.serway.Hwsp17s.docx 1 conrect) 1.whid of the following equations are dimensionally correct? select al that are a) v ax b y (2 m)cos (kx), where 2 m 2. ne gallon of paint (volume 3.78 x10 m) covers an area of 16.0 m what is the thickness of the fresh paint on the wall? 3. Compute (a) the order of magnitude of the mass of a bathtub half full of water. (Bathtub. Assume the tub measures 1.3 m by 0.5 m by 0.3 m.) (b) the order of magnitude of the mass of a b half full of pennies. (Assume the pennies are made entirely of copper.)[103kgl 4. Carry out the following arithmetic operations. (Give your answers to the correct number of significant figures.) (a) the sum of the measured values 756, 37.2, 0.83, and 2 (b) the product 0.003 2 x 356.3 (c) the product 5.620 x 5. Two points in the xy plane have Cartesian coordinates (2.00, -4.00) m and (-7.00, 7.00) m. (a) Determine the distance between these points. (b) Determine their polar coordinates. (2.00, -4.00) [r m, 0 o (counterclockwise from the x axis is positive)] (-7.00, 7.00) [r m, (counterclockwise from the x axis is positive)] a a 2/6/2017

Explanation / Answer

1] a] It does not has correct dimension because ax should have dimension of speed v

b] It has correct dimension as kx is dimensionless, and RHS and LHS both have dimension of m.

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