The three common phases of mqz-ehs hf9e6(atter are

  Density is

  Substance A has a density of srlxvd ri)392.j/5cq :i4j04x qc g k3wigkhy$3.0 \; g/cm^{3}$ and substance B has a density of $4.0 \; g/cm^{3}$. In order to obtain equal masses of these two substances, the ratio of the volume of A to the volume of B will be equal to

  Pressure is

  Which of the following is not a unit of pres(:m*utx) rz plsure?

  Consider three drinking glass05wz84pd z 4hl 89jac;lzrpd ges. All three have the same area base, and all three are filled to the same depth with water. Glass A is cylindrical. Glass B is wider at the top than at the bottom, and so holds more water than A. Glass C is narrower at the top than at the bottom, and so holds less water than A. Which glass has the greatest liquid pressure at the bottaw8 pg z rch8d0 d4zjz9lp;5l4om?

  What is the difference between the pressures inside and outside a.jmky1t vdy99 7k8*ch b2xxvx tire called?

  When atmospheric pressure changes, what h *0clyps,*c,/c (zw 1fer vfytappens to the absolute pressure at the bottom or,l0pfv(z ty,1c w*cy e*c/sff a pool?

  You are originally 1wo3hzz d 0nw+stv;vlv( ,by6.p9.e qa.0 m beneath the surface of a pool. If you dive to 2.0 m beneath the s e3,; vs6lh9wqda.n(op+vvbz z.yt0 wurface, what happens to the absolute pressure on you?

State Pascal's principgc.fx 7eb onp(y 0w.9qle.

State Archimedes' prikfmj f8 c 3eklx3s65zs)kn3 q9nciple.

  $50 \; cm^{3}$ of wood is floating on water, and $50 \; cm^{3}$ of iron is totally submerged. Which has the greater buoyant force on it?

  As a rock sinks deeper and deeper into water of constant density, what haplmslj 4,t/,sapens to the buoyant force ,jl as4sm,/tl on it?

  Salt water has greater density than fresh water. A boat floats in bothf+st+7a lpl ;xr1 wv;i fresh water and in salt water. Where is the buow7px l f vs+r+i1;tal;yant force greater on the boat?

  Salt water is more dense than fresh water. A shw(ymy:b lw)b0 ip floats in both fresh water and salt water. Compared 0 yb m:(bwlwy)to the fresh water, the volume of water displaced in the salt water is

  A steel ball sinks in wajts a-,+lz8 u w9qxj6zter but floats in a pool of mercury. Where is the buoyant forc,zq j alst+-6 x8ujw9ze on the ball greater?

  A 10-kg piece of aluminum sits at the bottom of a lake, right next tox g32ysfarn 6: a 10-kg piece of lead. Which has the greater buoaf 6nxg23 sy:ryant force on it?

  A piece of iron rests on topuo9- hw,qktedun 3 52z7lpz)j of a piece of wood floating in a bathtub. If the iron is removed from the wood, what happens to the72tew, u 9zdju3kz)po5l-nh q water level in the tub?

  A piece of wood is floating in a bathtub. 9y )p4uq8bf1ku9ilbsA second piece of wood sits on top of the first piece, and does noybfks1 up8i9qb4 )lu9 t touch the water. If the top piece is taken off and placed in the water, what happens to the water level in the tub?

  Water flows through a pipe. The diameter of thep-.oq4p2y cg:ykt kdy;* oo2w pipe at point B is larger than at point A. Where is ;d. o4yt po:cy okg22*y pk-wqthe speed of the water greater?

  An ideal fluid flows at 12 m/s in a horizontal pipe. If the pipeajk i(+(ga+( safvs rft+4*cs widens to twice its original radius, what is the flow speed in +gs +cvs+* (kfas4itfraj(a (the wider section?

  An ideal fluid flows at 12 m/s in z41w+dxk5 t+dvq dh- zywnbz7(dui8,a horizontal pipe. If the pipe narrows to half its original radius, what is the flow speed i514zu8- w 7 kidd h+(dznv,+qzty bdwxn the narrower section?

State Bernoulli's principin 9:,t k, bsgwy4gk-frh i nvq0+m7e.le.

  Which one of the following is associa ze2rl ii8l/u/z21rmw ted with the law of conservation of energy in fluids zl2r2/1 rzl8ume/wii?

  As the speed of a moving fluid increases, the pressure in tts8n, f1) rmz6lp6wzshe fluid

  Water flows through a pipe. The diameter of the pipe at point B is-hm zyw.lh a3mf0b;d : larger than at point A. Where is the water pressf h3- bzwm.;yl:mh0 daure greatest?

  When you blow some air above a pape5/z uy ms(2shovbk(mg,r m. t)0w/pl/qxmlc5 r strip, the paper rises. This is because

  A sky diver falls through the air at termin0pu.q am*)h/)kss u zxx5ny .aal velocity. The force of air resistancepka*x qu u.s zashyn)x.0)/m5 on him is

  Two Styrofoam balls, of radii R ash6.xe tonq,5+8rfis nd 2R, are released simultaneously from a tall tower. Which will reach the ground firtx+5hs.6n sfq er8,iost?

  When a small spherical rock of radius,b1 murcdu2e rw9l7/zd (gd1 c r falls through water, it experiences a drag force ud7guel(z,1rc r d /md2w9cb1$F=arv$, where $v$ is its velocity and $a$ is a constant proportional to the viscosity of water. From this, one can deduce that if a rock of diameter 2.0 mm falls with terminal velocity, $v$, then a rock of diameter 4.0 mm will fall with terminal velocity .

  Which has the greatest effect on the flow of fluid through a narrugceaad a+65-eh 9 h4kow pipe? That is, if you e9dheg5a6 khc4-u +aamade a 10% change in each of the quantities below, which would cause the greatest change in the flow rate?

  Two horizontal pipes armg u2ksu*v84u e the same length, but pipe B has twice the diameter of pipe A. Water undergoes viscous flow in both pip2m4ug8vus* kues, subject to the same pressure difference across the lengths of the pipes. If the flow rate in pipe A is Q, what is the flow rate in pipe B?

  Two horizontal pipes have the same diame pwn4d-28gzb pter, but pipe B is twice as long as pipe A. Water undergoes vi4 28gp- dbwnzpscous flow in both pipes, subject to the same pressure difference across the lengths of the pipes. If the flow rate in pipe B is Q, what is the flow rate in pipe A?

  When soup gets cold, it often tastes greasy. This "greasy" taste seems to be d03 l5z( )k,m lt;abhq qmte0eassociated with oil spreading out all over the surface of the soup, instead of staying0e l;mhed() qm3a,0z5 lqkbt t in little globules. To us "physikers", this is readily explained in terms of

  When a tube of diame mgeg cw27y0*pter d is placed in water, the water rises to a height h. If the diameter were half as great, how him*0e yggp7 2cwgh would the water rise?

  Certain insects, such as the water bug, are sufficiently ligazgpkj1oal40lg jc8g rr-l7 ibt4o9q-9x9. ohtweight that they can run on top of water without breaking the surface tension. Water bug A has weight W. Water bug B is twice as big as bug A, in all dimensik oll. orc49l xi7q 9a 1orz-89g g0-atjp4bgjons. That is, bug B is twice as long, twice as wide, etc. What is the weight of bug B?

  Certain insects, such as the water buug2.ttyag 7mx 8b 81r. ito5wmg, are sufficiently lightweight that they can run on top of water without breaking the surface tension. This is possible because the water, due to surface tension, exerts an upward force on the bottom of the bug's feet. Suppose that the maximum possible upward force on the feet of water bug A is F. Now suppose that water bug B is twice as big as bug A in every dimension. That is, but51gb .xmir7aoytw.um8 g 8t2 g B is twice as long, twice as wide, etc. What is the maximum upward force on the feet of bug B?

  A plastic block of dimensions 2.00 cm x 3.00 cm x 4.00 cm has uehdq 1lxy:w 37gm(:2ymqbq9a mass of 30.0 g. What is it:mqh 9mq:ybqw dg yu72xl1e (3s density?

  A liquid has a specific gra 3a6*gqqdy 2pl 8 u5wz1ptzc7xvity of 0.357. What is its density?

  A brick weighs 50.0 N, and measures 30.0 cm x 10.0 cm x 4.00 c-bt) vjxl o8z0e2 u,nxm. What is the maximum pressure it can exertu8 x 2,0)ej-xbovzltn on a horizontal surface?

  A person weighing 900 N is standing on snowshoes. Each snowshoe vosura2ebr bg(:+6l6has area $2500 \; cm^{2}$. What is the pressure on the snow?

  How much pressure (absolute) must a subm0j7sr pkmk+i/88yt bzarine withstand at a depth of 120.0 m in the rz y7pj +0mt/k b8k8siocean?

  A circular window of 30 cm diameteruab9 04oqv+d m8 fxr5h in a submarine can withstand a maximum force 9f+vhobu m a5qdr084xof $5.20 \times 10^{5} \; N$. What is the maximum depth in a lake to which the submarine can go without damaging the window?

  What is the gauge pressure if the absolute pressure is 300 kP1wj7hwifk*h .a?

  What is the gauge pressure at a locat 7saxv/;db tbh86yr(s;gsa5 f ion 15.0 m below the surface of sea? (The density o x sgfsa57y;h;v8d a6t(r/s bbf seawater is $1.03 \times 10^3 \; kg/m^{3}$.)

  What is the absolute pressure at a location 15.0 i :mv 1r6ht:j c(o359dip9hw4lde brl m below the surface of sea? (The density of seawatermilwb:9li1 h4t hr( 6:pd59oejcr d3v is $1.03 \times 10^3 \; kg/m^{3}$.)

  A 500-N weight sits on the small piston of a iw z vd0oyi36*hydraulic machine. The small piston has area z0v *ywii d63o$2.0 \; cm^{2}$. If the large piston has area $40 \; cm^{2}$, how much weight can the large piston support?

  In a hydraulic garage lift, the small piston has a radius of 5.0 cm and tsx5 8q40hu cdr7;ycn ihe large piston has a radius of 1rc y5 ; dnsucqh74ix085 cm. What force must be applied on the small piston in order to lift a car weighing 20,000 N on the large piston?

  A 13,000 N vehicle is to be lifted by a 25 cm diameter hydracma5m n2 5cn+aulic piston. What force needs to be applied to m5n cnamc2+ 5aa 5.0 cm diameter piston to accomplish this?

  The small piston of a hydraulic lift has a diameter of 8.0 cm, and its large p* 6wk ft5w3 twmptc7z+l8d/w uiston has a diameter of 40 cm. The lift raises a load of w t5tc6tpf 8 d*zlu/73kmwww+15,000 N.
(a) Determine the force that must be applied to the small piston    $N$ (fill in numerical value only)
(b) Determine the pressure applied to the fluid in the lift    $\times 10^5 \; Pa$ (fill in numerical value only)

  A block of metal weighs,m3.n1q4svo ,0bgsa 2*a kj nquknll- 40 N in air and 30 N in water. What is the buoyant force of the water?2 * 1onav bkk us4,lljn 0q3g.nsaqm-,

  An object has a volume ofq/sl +i- 9sqmo $4.0 \; m^{3}$ and weighs 40,000 N. What will its weight be in water?

  A 4.00-kg cylinder of solid iron is supported by a string h03+:8(qv onzn uszinwhile submerged in water. What is the t iqn38no 0:z+shvzu(nension in the string? (The specific gravity of iron is 7.86.)

  If the density of golv4 6zhr1ddt .rgsd(2rx c+u x:d is $19.3 \times 10^3 kg/m^{3}$, what buoyant force does a 0.60-kg gold crown experience when it is immersed in water?

  A crane lifts a steel submarine (densd5c1dn+jm n5+xrly 6ct3 1 wuqity = $7.8 \times 10^3 \; kg/m^{3}$) of mass 20,000 kg. What is the tension in the lifting cable (1) when the submarine is submerged, and (2) when it is entirely out of the water?

  An object weighs 7.84 N when it is in air an vtkkcj5ysek( b 37 g*y+vxeueq20a0h2q .:hnd 6.86 N when it is immersed in water. What is the specific gravs+knxb*e5ee(qv gq3u02c:y 0ahhk7.ky v t2j ity of the object?

  A container of water is placed on a scale, and the scale o5ugw )v9 6.8jzvf2b z1*bro zqy a7dureads 120 g. Now a 20-g piece of copper (specific gravity = 8.9) is suspended from a thread and lowered into z oqd9g a 8)f5vz1jybo.uz76v*w2bru the water, not touching
the bottom of the container. What will the scale now read?

  A piece of aluminum withecp0pe j38dh - a mass of 1.0 kg and density of $2700 \; kg/m^{3}$ is suspended from a string and then completely immersed in a container of water. The density of water is $1000 \; kg/m^{3}$.
(a) Determine the volume of the piece of aluminum    $\times 10^{-4} \; m^3$ (fill in numerical value only)
(b) Determine the tension in the string after the metal is immersed in the container of water $N$ (fill in numerical value only)

  A cylindrical rod of length 12 cm awyds4n 920x*c0qxyo (*zy h /q b;v hlc;khjh3nd diameter 2.0 cm will just barely float in water. W9c4*lw b 0 2xjqy h;z sc; d*hhn(ky3xy/hovq0hat is its mass?

  A rectangular box of negligible mo 3,jlh cov50mass measures 5.0 m long, 1.0 m wide, and 0.50 m hol m ,j05hv3ocigh. How many kilograms of mass can be loaded onto the box before it sinks in a lake?

  A $1.0 m^{3}$ object floats in water with 20% of it above the waterline. What does the object weigh out of the water?

  An object floats with half its volume beneath the surface of the water. Tsfur**ji8pj. )vt 9)vjbw q6rhe weight of the displaced water is 2000 N. What is thet ujf.q* wbv*j6 8r rvj)p9is) weight of the object?

  A solid object floats in water with three-fourths of its volume beneath stg ,6 .*xjey 853k0ev/z jk;sbcp ihwthe surfaceh vsb.k53wsjpk6 ei/*c ;j80xtze y,g . What is the object's density?

  A 200-N object floats with three-fourf*eeq 34ygh;lv x* ),be0cxvpths of its volume beneath the surface of the water. What ise yqv3b ,xvc*epf4)hx0*e;lg the buoyant force on the object?

  A polar bear of mass jqaajv 18p3, lr1o3km 200 kg stands on an ice floe 100 cm thick. What is the minimum area of the floe that will just support the bear in saltwater of specific gravity 1.03? The specific gravity of ice is 0.98o 1 p j1,j3ak83laqmrv.

  Liquid flows through a pipe of diameter 3.0 cm at 2.0 m/s. Fdwn+8 odd n1 qtgy0d1- q/amj0ind the flow rate.

  Liquid flows through a 4.0 cm diameter pipe at 1.0 m/s. i1 os*)p-inl2o ki4v ,qzfz9n There is a 2.0 cm diameter restriction in the line. What is the v-,f iv zis4k*i1noz)np9ql o 2elocity in this restriction?

  Water flows at 12 m/s in a horizontal pipe with a pr)zo (u+bmt-l iessure of $3.0 \times 10^4 \; N/m^2$. If the pipe widens to twice its original radius, what is the pressure in the wider section?

  How much pressure does it take for a pump to supply a drinkk0 e4 vr- ris71txxr+king fountain with 300 kPa, if the fountain is 30.0 m above t 1kv+e-irx4s0xrk7 rthe pump?

  A hole of radius 1.0 mm occurs in the bottom of a water storage urd8 5jq;z1;8xflcwy tank that holds water at a depth of 15 m. At what ratew 8fq1c;y ;rxj 8du5zl will water flow out of the hole?

  Water flows through a horizontal pipe of cross-secbtx/v4qu7z0d tional area $10.0 \; cm^{2}$ at a pressure of 0.250 atm. The flow rate is $1.00 \times 10^{-3} \; m^{3}/s$. At a valve, the effective cross-sectional area of the pipe is reduced to $5.00 \; cm^{2}$. What is the pressure at the valve?

  SAE No. 10 oil has a viscosity of 0.20 Pa-s. How long would z5e; l r,).yk3 )nr2c wscindiit take to pour 4.0 L of oil through a funnel with a neck 15 cm long and 2.0 cm in diameter? Assume the surface of the oil is kept 6 cm above the top of the neck, andz;.rniyn),dc ikwc rl25 e3) s neglect any drag effects due to the upper part of the funnel.

  Suppose that the build-up of fatty tissue on the walleog9pb4k,y85l4i3x-ivp b+q) d wlv d of an artery decreased the radius by 10%. By how much would the pressure provided by pi5l8 ky 4gvo b -pxbi)4d,93wldve+qthe heart have to be increased to maintain a constant blood flow?

  Two narrow tubes are placemat nb9vivwvnpt.c, d;ye,:;d f7 0++j1 xlyed in a pan of water. Tube A has twice the diameter of t, ;ed+pit:xa1 tnvb f,vn9cj7yy.m l0e+d vw;ube B. If water rises 24 cm in tube A, how high will it rise in tube B?

  The surface tension of wa ox o.ajwu-o70ter is 0.073 N/m. How high will water rise in a capill7xo-woj uo.0 aary tube of diameter 1.2 mm?

  232

  To what height would water at 0 degreel; hw;xkdwow1 2 3oh -.bxli5e Celsius rise in a glass capillary tube with a dl-e 1;wkobx i2;hdh wlo5xw3.iameter of
0.50 mm?

  A narrow tube is placed vertically in a pan of water, and the water rises4t. 3jcycv 9qu in the tube to 4.0 cm above the level of the pan. The sur uc34t.y 9cjvqface tension in the liquid is lowered to one-half its original value by the addition of some soap. What happens to the height of the liquid column in the tube?

  Consider a rectangular frame of length 0.120 m and width 4a6h eh1kl40adjh+cf0.600 m with a soap film formed within its confined area. If the surface tension of soapy water is 0.0260 N/m, how much force does the soap film exert on the 0dfka6hhl4 1j+04e hac .600 m side?

  An adjustable rectangular fyoz3 mr5k:+j :wklq* jrame has length 12 cm and width 5 cm, and is built in such a way that one of the longer sides can be moved without bursting the soap film contained in the frame. Soapy water has surface tension 0.026 N/m. How much work is required to move the adjustyj3q:mwko5z r l+ :j*kable long side so that the frame is 12 cm square?