Question

Write your answers (with appropriate precision) in the blanks provided. Indicate all units. 5. You use a string to rotate a 30-g cork. The other end of the string is threaded through a glass tube, and a 200-g mass is suspended at the bottom. This keeps the tension in the string constant. Use information to fill out the missing entries in the table: this String Radius Tension (N) Theoretically Linear velocity : v based on the measurement %error in linear velocity Measured RPM based on the measurement (cm)expected linear number of rotations over 15 seconds velocity v 20 41 50 29 7 1% | 120|025 | 18 |アス 6. In the buoyancy experiment, you've measured: The height ofThe The true The apparent The true weight The apparent weight a Copper diameter of weight of the weight of the of a Wooden of the combination of cylinder (cm) the CopperCopper Copper cylinder cylinder in air the wooden cylinder cylinder in air fully tied to the copper cylinder (cm) (N) submerged in cylinder in water (N) water (N) 6.0 2.0 5.0 4.0 0.3 3.8 Calculate the required quantities to fill out the table below. In the parentheses indicate units. Experimental Theoretical buoyant force buoyant force acting on the copper cylinder cylinder () % err measurement of the buoyant force acting on the zinc cylinder or of the The density of the copper cylinder () Experimental buoyant force acting on the wooden cylinder acting on the zinc
Having trouble finishing #5 and I really have no idea what to do with #6, please help!

Thank you

Answer 1

Given that you use a string to rotate a 30.g cork the other end of the string is threaded through a glass tube and a 200 g mass is suspended at the bottom 200 times 10^-3 times g = T = 30 times 10^-3/R = > v^2 = 200/30 g R = [200/3 R] v = squareroot 200R/3 (i) v_1 = squareroot 200 times 0.2/3 v_1 = 3.65 m/sec (ii) v_2 = squareroot 200 times 0.5/3 v_2 = 5.77 m/sec \r\n (iii) = squareroot 200 times 1.2/3 = squareroot 240/3 = squareroot 80 v_3 = 8.93 m/sec = > R p m rightarrow Revolution per min (i) R P M = 41/15 times 60 = 164 R p m (ii) R p m = 29/15 times 60 = 116 R p m (iii) R pm_3 = 10/15 times 60 = 72 R p m \r\n = > measured linear velocity