Give an example of a system, which is at unsteady state. Explain why.
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- •35 Three children, each of weight 356 N, make a log raft by lashing together logs of diameter 0.30 m and length 1.80 m. How many logs will be needed to keep them afloat in fresh water? Take the den- sity of the logs to be 800 kg/m?.30⁰ Given: Using the provided information, compete the following problems. NOTE: Find: The system shown is initially in static equilibrium and motionless. Submitted responses shall be to 4 significant figures. Do NOT use scientific notation. 1. The maximum magnitude of the Weight-W that will not initiate motion is 2. The minimum magnitude of the Weight-W that will not initiate motion is 3. Assume the 50LB-Block is on the verge of moving up the inclined plane. The magnitude of internal force in the rope (near the 50LB-Block) is 4. Assume the 50LB-Block is on the verge of moving down the inclined plane. The magnitude of internal force in the rope (near the 50LB-Block) is 50 lb Hs=0.30 W H, = 0.20 LB. LB. LB. LB.Friction and drag are the primary causes of increased thermal energy in a system. True False
- A rigid, lighter-than-air dirigible filled with helium cannot continue to rise indefinitely. Why? What determines the maximum height it can attain?3. On a very rainy day, Nick drags a box of old books to the bookstore to sell. The box moves through the puddles at U = 10 ft/min. For all calculations use an approximation that the box follows the figure. Calculate the force required to keep the box moving at U. Hints: obtain drag coefficient by calculating the Reynolds number; consider the projected area as the bottom plus the two long sides. • Determine the power (in watt) required to overcome the skin friction drag B = 2 ft L=3 ft -Water line D = 2 inP-2 Please I need help with this question needed very clearly and step by step explanation and NEEDED ONLY HANDWRITTEN SOLUTIONS PLEASE REMEMBER HANDWRITTEN please, will be really appreciated for your help. NEEDED ONLY HANDWRITTEN SOLUTIONS