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- As part of a biology field trip, you have taken an equal-arm balance (Fig. P1. 14) to the beach. Your plan was to measure the masses of various mollusks, but you forgot to bring along your set of Standard gram masses. You notice that the beach is full of pebbles. Although there are variations in color, texture, and shape, you wonder whether you can somehow use the pebbles as a Standard mass set. Develop a procedure for assembling a Standard mass set from the pebbles on the beach. Describe your procedure step by step so that someone else could follow it.RTI The molecules in a six-particle gas have velocities ₁ (201-30j) m/s V2 (10i+60j) m/s 73=(-501 +20j) m/s 7= 30i m/s Vs (40i-40j) m/s ₁=(-50 i 10j) m/s Calculate Varg Express the x and y components of the velocity in meters per second separated by a comma. Uz avg, Uy avg Submit Part B VD|| ΑΣΦ Request Answer W Calculate Davg- Express your answer with the appropriate units. ? m/sWhen the length L of aclock pendulum is held constant by controlling its temperature,the pendulum’s period T depends on the acceleration of gravity g.The period will therefore vary slightly as the clock is moved fromplace to place on Earth’s surface, depending on the change in g.By keeping track of DELTA T, we can estimate the variation in g fromthe equation T = 2π(L/g)1/2 that relates T, g, and L. A clock with a 100-cm pendulum is moved from a location where g = 980 cm/sec2 to a new location. This increases the period by dT = 0.001 sec. Find dg and estimate the value of g at the new location.
- Using AMM, solve for: a. Y. (mm) b. ӨЕ (гad) P= 128 kN E = 200 GPa, I= 3.125x10° mm* P (kN) kN/m 75 60 kN/m 2m 1m 3m 3m 90 kN.m A B EWork done in blocuing a soap bubble of diameter 2 cm is (S.T. = 3 x 102 N/mm). (a) 7.54 x 10-5 J (b) 7.54 × 106 J (Ⓒ) 7.54 x 10³] (d) 7.54J> In this problem you will consider the balance of thermal energy radiated and absorbed by a person. Assume that the person is wearing only a skimpy bathing suit of negligible area. As a rough approximation, the area of a human body may be considered to be that of the sides of a cylinder of length L = 2.0 m and circumference C = 0.8 m. For the Stefan-Boltzmann constant use o= 5.67 x 10-8 W/m²/K4 Part C Now calculate Por, the thermal power absorbed by the person from the thermal radiation field in the room, which is assumed to be at Troom = 20°C. If you do not understand the role played by the emissivities of room and person, be sure to open the hint on that topic. Express the thermal power numerically, giving your answer to the nearest 10 W. View Available Hint(s) Por= Submit Part D [-] ΑΣΦ. Pnet = 17] ΑΣΦ Find Paet, the net power radiated by the person when in a room with temperature Troom= 20°C. Express the net radiated power numerically, to the nearest 10 W. ▸ View Available Hint(s)…
- •A steel tape measure is calibrated at 70 o F. A reading of 120 ft is obtained when it isused to determine the width of building at 0 o F. What is the true width of the buildingat 0 o F?' •A 300 g aluminum pot containing 0.50 L of water is placed on the 1 kg iron hot plateon an electric stove. The heating element of the hot plate is rated at 1.5 kW. If the hotplate, the pot, and the water are all at 20 o C when the heating element is switched on,how long will it take until the water begins to boil? Neglect heat losses to thesurroundings.(P2-Pi) AV. (14-34) W =W, + W, = AK. Substituting from Eqs. 14-32, 14-33, and 14-34 yields - Pg AV(-)- AV(P2- P)=pAV(v} – vi). %3D This, after a slight rearrangement, matches Eq. 14-28, which we set out to prove. M Checkpoint 4 Water flows smoothly through the pipe shown in the figure, descending in the process Rank the four numbered sections of pipe according to (a) the volume flow rate Ry through them, (b) the flow speed v through them, and (c) the water pressure p within them, greatest first. Sample Problem 14.06 Bernoulli principle of fluid through a narrow pressure diffeA A A A I. If A = 4x + 2y and B and B` =− 2x + 4z, what are Ø – B`, A¯ • B`, and A × B¯? II. If E = k 29 what is – E dr if k and a are constants? k III. If V = what is 9 r α dV dr ∞ if k is a constant?
- A picture window has dimensions of 1.3 m by 2.3 m and is made of glass 6 mm thick. On a winter day, the outside temperature is 25° C while the inside temperature is a comfortable at 16° C. (k of glass =0.065W/m.K) (a*1.5)+(b*1.5)+(c*2.0) = 5marks) %3D of Calculate the following: stion a) the area of the window in square metres b) the temperature gradient (AT/Ax)in kelvin/metre Othe rate of heat lost through the window by conduction in watts/metre.kelvinWhat will be the temperature of the skin so as to radiate 0.08 w/cm2 knowing that Stefan constant= 5.7x10-12 w/cm?.k*. 306.1 k° 344.2 k° 380 k°Q1/ If H = U + PV, find the relations between G and FH.
