Water flows through a pipe of diameter 2 cm at a speed of 1 m/s. What should be the diameter of a nozzle if the water is to emerge at a speed of 20m/s?
It's the question of continuity in which we A1 V1 =A2V2 in which A denotes cross sectional area and v denotes velocity . If you put the values in this question you get the answer
How big is 10 cm in diameter?
Consider this- when you are in labor, your cervix dilates to 10 cm to allow the baby to pass through the birth canal. It's like the person said above, about the size of a grapefruit.
A solenoid 10.0 cm in diameter and 82.5 cm long is made from copper wire of diameter 0.100 cm.?
B = µ0*n*i/L then i = B*L/(µ0*n) µ0 = 4*π*10^-7 H/m n = 82.5/0.100 = 825 turns i = ? L = 0.825 m B = 8.20*10^-3 T i = 6.53 A The resistance of the wire R = ρ*Lw/As Lw = n*π*d As = π*(d/2)² R = (1.8*10^-8)*(825*π*0.100)/(π*0.05²) = 0.00594 Ω Power = i²*R = 0.025 W
What is the resistance of a 440 cm long wire of 0.28 cm diameter with specific resistance of 0.56 ohms-cm?
R α L/Awhere R is resistivity, L is the length of wire or conductor & A is the area of conductor.You did not mentioned the area. So I am assuming 0.56Ω is the resistance of 1cm of wire having 0.28cm diameter. So a 440cm long wire will have (0.56*440)Ω i.e. 246.4Ω.
A chord 12 cm long is drawn in a circle of diameter 20 cm. The distance of the chord from the centre is?
GIVEN: A circle with centre O. Radius AO = 10cm, Chord AB = 12cmTO FIND : The distance OM of the chord from O.OM is perpendicular to the chord AB.As, Perpendicular from the centre to a chord bisects the chord. So AM = AB/2 = 6cmIn right triangle AMO ,AO² = AM² + OM² ( by Pythagoras law)=> 10² = 6² + OM²=> 100 = 36 + OM²=> OM² = 100 - 36 = 64=> OM = √64 = 8cm
If a circle has a diameter of 10 cm, how long the radius will be?
Question: - “If a circle has a diameter of 10 cm, how long the radius will be?”For all circles,Diameter = 2 X (Radius), or,Radius = 1/2 X (Diameter.So, for C = 10 cm, r =5 cm.
How much force does it take to stretch a 20-m-long, 1.0 cm-diameter steel cable by 6.0 mm?
Young’s modulus of steel Y = 200 * 10 ^ 9 Pa Length L = 20m Diameter d= 1 cm = 10 ^ -2 m Area of cross section A = (pi) d ^ 2 / 4 = 0.7853 * 10 ^ -4 m^ 2 Streatchness e = 6 mm = 6 * 10 ^-3 m We know Y = ( F / A ) / ( e/ L ) = FL / Ae force F = YAe / L = 200.10^9x0.785.10^-4x 6.10^-3 / 20 = 4710 N
A 10-cm-diameter cylinder of helium gas is 20 cm long and at 20°C. The pressure gauge reads 120 psi.?
You need to find moles then use the ideal gas law PV = nRT The volume is found by using the volume of a cylinder. pi x r^2 x height, 3.14 x 100 x 20 = 6280 cm^3. Assuming 1mL / cm^3 then that is equal to 6280 ml or 6.280 L n = PV / RT I don't know what R is for pressure measured in PSI but I'm sure you have it somewhere. Once you have calculated moles, just multiply the answer by avogadro's number 6.023 x 10^23
A bicycle wheel has a diameter of 50 cm. How far does the bicycle travel when the wheel makes 30 turns using algebra?
HelloWheel Diameter = Wheel 2 x Radius; 50 cm / 2 = 25 cm.For one rotation of the wheel, the distance travelled = circumference of the wheel.Circumference = 2 x pi x radius = 2 x 3.1415926858 x 25 cm = 157.07 cm approx.Distance travelled with 30 turns of the wheel = 30 x 157.07 = 4712.39cm approx.Distance in meters = 4712.39cm / 100 = 47.12388 meters approx (1 cm = 1/100th of a meter).Hope this helps