Consider molecules diffusing from a region of fixed high concentration to a region of fixed low concentration. the flux diffusing through an area of 1 mm 2 is J= 3000 particles m² s what is the flux diffusing through an area of 2 mm2. J'= particles m2 s

Q: A boat with a flat bottom and its cargo weight 5,317N. The area of the boat's bottom is 5 m2 . How…

A:

Q: A future rectangular ship (tanker) filled with oil. If the dimensions of the ship are (250 m) long,…

A: Buoyant force=weight of ship Buoyant force =weight of displaced fluid.

Q: Gold, which has a density of 19.32 g/cm³, is the most ductile metal and can be pressed into a thin…

A: density of gold (d) = 19.32 gcm3using conversion factor , 1 kgm3 = 1000 gcm3= 19320 kgm3

Q: What is the weight of air inside a ciosed room 6 meters long, 4 meters wide, and 3 meters nigh if…

A:

Q: The metal sphere of surface area A, radius R, and volume V is subject to pressure P such that the…

A:

Q: Wood Values Mass (kg) Weight (N) Volume (L) Volume (m³) Density (kg/m³) 2.00 5.00 Water Values…

A:

Q: How much total pressure is exerted on a submarine at a depth of 9.3 km in the Pacific Ocean (sea…

A: depth = 9.3 km density of sea water = 1025 kgm3

Q: The force on a phonograph needle is 1.2N. The point has a circular cross-section whose radius is…

A: The equation for the pressure is given by,

Q: A crown that is supposed to be pure gold has a mass of 850 g. Its apparent mass when immersed in…

A:

Q: A piece of wire of length 1.00 m is cut into two parts, one of which is bent into a shape of a…

A: GivenA piece of wire of length 1.00 m is cut into two parts

Q: The velocity field of a fluid v (in meters per second) has divergence div(v)(P) = 3 at the point P =…

A: The flow rate through the box is flowrate=divvP×Volume The velocity field of a fluid v has…

Q: What is the mass of air at 20 degree Celcius in a room with dimensions 3m by 4m by 5m? ( P air =…

A: Given: The density of air = 1.20 kg/m3 Dimensions of the room = 3m by 4m by 5m Mass =?

Q: If the atmospheric pressure is 1,051 mm Hg and the height difference between the two arms is 14.4 cm…

A:

Q: The Navier-Stokes equation is the fundamental equation of fluid dynamics. In one of its many forms…

A: Given:-            The Navier stokes equation for in compressible viscous flow is given by:…

Q: A U.S. 1-cent coin (a penny) has a diameter of 19 mmmm and a thickness of 1.5 mmmm. Assume the coin…

A: diameter of coin= 19 mm Radius of coin (r) = 9.5 mm Thickness (t) of coin = 1.5 mm density of pure…

Q: Gold, which has a density of 19.32 g/cm3, is the most ductile metal and can be pressed into a thin…

A:

Q: what is the angle of the surface of the fluid if the container moves 10m/s^2 horizontally a. 26.78…

A:

Q: In Fig. H-2, A water tank is 8 m in diameter and 12m high. If the tank is to be completely filled,…

A: Height. h = 12 m  specific weight, ƴ = 9.81 kN/m3 Inside diameter, D = 8 m  Stress, S = 40 MPa =

Q: The greater the IMFS the weaker the substance's surface tension. O True False

A:

Q: A two-dimensional flow field for a liquid can be described by V = {(2y? – æ)i+(3x + y)j} m/s, where…

A:

Q: Two bubbles have the same surface tension, but bubble X has 3 times the radius of bubble Y. What is…

A: Given dates two bubbles X and Y have the same surface tension and radius of bubble X is three times…

Q: Water in an irrigation ditch of width w = 3.22 m and depth d =1.04 m flows with a speed of 0.207…

A:

Q: f the sphere's radius is 0.5m and its Re in air 1 x 106, what is nearly velocity ( air density =…

A: Given, Radius of the sphere, r = 0.5 m Reynolds number of sphere falling in air, Re = 1×106 m air…

Q: The rate of flow of the liquid through the tube of length I and radius r, connected across a…

A:

Q: A garden hose has an inner radius of 1.3 cm, is connected to a spray nozzle (radius: 0.5 cm). If…

A:

Q: A two-dimensional flow field for a liquid is defined by V = [(x +2y²)i+ (2x² – 3y)j] m/s, where a…

A:

Q: A solid which has a density of 2.7 g/cm3 has a cavity inside. When it is weighed in air, it is found…

A:

Q: A 2.0-kg spherical balloon has a radius of 7.35 m and is filled with helium. How large a load can it…

A: F(b) = (mass of helium +mass of cargo)*9.8 F(b) = density of air *volume*9.8 so,(density of helium…

Q: Suppose that a copper sphere of radius 3 cm is beaten and drawn into a wire of diameter 0.2 cm. What…

A: When copper sphere is beaten and drawn into coper wire  It's mass and density will be equal  We know…

Q: A 50 kg ballet dancer standing flat-footed on one foot exerts a pressure of 33,500 Pa on the floor.…

A:

Q: A weight lifter holds 900N over his head ?why?

A: To determine  a weighs lifter holds 900N over his head

Q: A box has a volume of 3.5 m3. The volume of the box, in ft3, is closest to: a) 35 b) 53 O c) 59 O d)…

A: given: V =3.5 m3

Q: Q.2. When an oblique shock strikes a solid wall, it reflects as a shock of sufficient strength to…

A:

Q: The speed v of a liquid leaving a tube depends on the change in pressure AP and the density p of the…

A: Write the expression of speed as given below. Here v signifies speed, k signifies constant, P…

Q: A piston consist of two cylinder of different diameters (5 and 30 ) cm that connect together and…

A:

Q: We should also get our density in terms of kg/cm3 [2(1.67 x 10-27 kg) 1 H, molecule Pkg = n Pkg How…

A:

Q: A solid which has density of 2.7 g/cms has a cavity inside. When it is weighed in air, it is found…

A: Mass of water displaced is, m=ma-mw=312 g-160 g=152 g Volume of water is, V=mρw=152 g1 g/cm3=152 cm3

Q: Which best explains why the meniscus of mercury in a glass tube is convex? A) The great attraction…

A:

Q: What is the angle of the surface of the fluid if the container moves 1m/s2 horizontally a. 3.12 b.…

A:

Q: If a solid steel ball is immersed in an eight cm. diameter cylinder, it displaces water to a depth…

A: Let its radius of ball is r  Now  (4/3)πr3 = πd2h/4  r3 = (3×82×2.25)/16  r3 = 27  r = 3 cm

Q: What fraction of the volume of a solid piece of metal of sg =6.50 floats above the surface of…

A:

Q: An important design consideration in two-phase pipe flow of solid-liquid mixtures is the terminal…

A: The terminal velocity of a solid particle in the rest water is given by, The dimensions of the…

Q: Why do plasma sheaths exist at the edge of the plasma and near the vacuum chamber walls? fast…

A: Introduction: In the earlier days, only three states of the matter were exist. After the advancement…

Q: The absolute density of a substance in g/cm^3 A) Is greater than its relative density B) Equals its…

A: The density is defined a the mass per unit volume.  The SI unit of density is kg/m3 and the CGS unit…

Proper Length

The theory of special relativity explains the connection between space and time to objects that move in a straight line at a constant speed. The objects move at the speed of light. When an object approaches light speed, its mass is endless and cannot move faster than light. The most crucial postulate of Einstein's special relativity is that the laws of nature do not change in each frame of reference.