What happens to projectile when it dissociates in air?
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- A glass soda bottle is emptied of soda and filled to the very top with water. A cork is carefully fitted into the top of the bottle, leaving no air between the cork and the water. (Figure 1) The top of the bottle has a diameter of DtopDtopD_top = 2.00 cmcm and the bottom of the bottle has a diameter of DbotDbotD_bot = 6.50 cmcm . A student hits the cork sharply with her fist and the bottom of the bottle breaks. The student's fist has a mass of mmm = 0.480 kgkg and moves downward at a speed of viviv_i = 5.00 m/sm/s . It collides elastically with the cork and rebounds with the same speed. The collision lasts for ttt = 1.20×10−4 ss . In this problem, the positive direction is upward. What is the force that her fist exerts on the top of the bottle?If you dangle two pieces of paper vertically, a few inches apart, and blow between them, how do you think the papers will move?Why is it easier to float in saltwater than in fresh water?
- A large spherical air balloon is filled with helium. If the balloon is to support (meaning produce a net acceleration of 0) a total load of 300 kg, including its own mass, calculate the minimum radius of the balloon. Assume values of the density of air and helium to be 1.29 kg/m and 0.18 kg/m respectively 4.8 m 3.6 m O 3.8 m O 3.1 m O 4.5 mIf you blow a thin stream of air with a speed of 7.2 m/s out of your mouth, what is the overpressure in your mouth? Assume that the speed of the air in your mouth is (nearly) zero.The mountains of the Himalayas are slightly less dense than the mantle material upon which they “float.” Do you suppose that, like floating icebergs, they are deeper than they are high?
- Find the center of mass of a laminate bounded by y=−x,y=x,y=2 with variable density modeled by \rho (x,y)=y+5. Question 3 Answer a. (0,2619) b. (35,94) c. (−23,116) d. None of the above e. (0,1) f. (0,32)An airplane has wings, each with area 3.85 m2, designed so that air flows over the top of the wing at 248 m/s and underneath the wing at 226 m/s. Approximately what size wings would an aircraft need on Mars if its engine generates the same differences in speed as in the "Practice It" and the total mass of the craft is 300 kg? The density of air on the surface of Mars is approximately one percent Earth's density at sea level, and the acceleration of gravity on the surface of Mars is about 3.8 m/s2. ______________m2An Airbus A380-800 passanger airplane is cruising at constant altitude on a straight line with a constant speed. The total surface area of the two wings is 395 m². The average speed of the air just below the wings is 248 m/s, and it is 278 m/s just above the surface of the wings. What is the mass of the airplane? The average density of the air around the airplane is pair = 1.05 kg/m³.
- A typical hot air balloon can carry 3–5 passengers in a wicker basket and has a total mass of m = 470 kg including passengers, not including the mass of air inside the balloon. The density of hot air inside the stationary balloon is ?hot = 0.960 kg/m3 and the density of the cooler outside air is ?cool = 1.22 kg/m3. Determine the volume of hot air required for the balloon to be in equilibrium so that it neither sinks nor rises in the air.When a fish expands its air bladder, the depth of the fish (how far it is from the surface of the water) sometimes increases and sometimes decreases depending on the size of the fish. decreases. stays the same. increases. Don't use Chat GPT please.......Water is ejected from the water nozzle with a speed vo = 41.7 ft/sec. For what value of the angle will the water land closest to the wall after clearing the top? Neglect the effects of wall thickness and air resistance. What distance x to the right of point B does the water land? Answer: 0 = A X= 10 8 13.3' i i 45' Not to scale ft 6.9' B