Number of helium atoms which are contained in the balloon
A balloon is filled by helium at a pressure of 2.4x 10^5 Pa. The balloon is at a temperature of 18C and consists of a radius of .25m. Determine the number of helium atoms which are contained in the balloon?
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A balloon of 3.2 kg is filled with helium having density .179kg/m^3. When the balloon is a sphere having a radius of 4.9 m, determine the maximum weight it can lift?
When a solution which is having 100ml of an acid, HA and 100ml of the solution of a base, BOH, are mixed in a calorimeter, the heat capacity of the calorimeter is 10.5 J/Co and the temperature increases from 21.7 o C to35.8o C.
Water flows via a horizontal tube of diameter 2.8 cm which is connected to a second horizontal tube of diameter 1.6cm. The pressure difference among the tubes is 7.5 kPa. Determine the speed of flow in the first tube.
A horizontal pipe carries oil having coefficient of viscosity .00012N s / m^2. The diameter of the pipe is around 5.2 cm and its length is 55m. Determine the volume flow rate in this case?
Determine the approximate molecular weight of this unknown compound which is having the empirical formula of C2 H3Cl2.
Evaluate the temperature change as a pure liquid which is converted to a solid at its freezing point with the temperature change as a solution is converted to a solid at its freezing?
How much will the person earning median amount earn until retirement if he or she joins work force instantly after high school graduation without going to college?
A rubber ball of 0.44 kg has a speed of 1.50 m/s at point A and kinetic energy of 7.3J at point B. (i) Find the kinetic energy of ball at A.
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