A plastic bag is filled with helium at atmospheric

Reference no: EM13626812

A plastic bag is filled with helium at atmospheric pressure and 23.0 oC. Assume that the mass of the bag is negligible and take the temperature of the outside air to be 0 ^oC. With the help of this "balloon" we want to lift a 50.0 kg girl off her feet.

a) How large a volume of helium (in m3) is required?

b) If hot air is used instead of helium, what is the required volume of the balloon if the air inside can be maintained at 36.0 oC ?

Reference no: EM13626812

Questions Cloud

A spark-ignition engine has a compression ratio of 8 an : a spark-ignition engine has a compression ratio of 8 an isentropic compression efficiency of 85 and an isentropic

An air pressure is to be measured relative to atmosphere : an air pressure is to be measured relative to atmosphere using an inclined manometer with a resolution of 1 mm and a

A mixture having a molar analysis of 66 n2 17 co2 and 17 : a mixture having a molar analysis of 66 n2 17 co2 and 17 h2o enters a turbine at 1000 k 8 bar with a mass flow rate of

Calculate the rate of heat transfer through the plates what : suppose that two plates thickness t0.027 m and area a1.2 m2 for each plate are mated together. the thermal conductivity

A plastic bag is filled with helium at atmospheric : a plastic bag is filled with helium at atmospheric pressure and 23.0 oc. assume that the mass of the bag is negligible

A boat and trailer are being pulled along a bumpy road at a : a boat and trailer are being pulled along a bumpy road at a velocity v. the contour of the road can be approximated by

The center lines of hte inlet and discharge pipes are at : a turbine is supplied with 0.6m3s of water from a 0.3m diameter pipe the discharge pipe has a diameter of 0.4m. the

An insurance company states that 90 of its claims are : an insurance company states that 90 of its claims are settled within 30 days. a consumer group selected a simple random

Engine oil at 200 oc is forced over a 20-cm-square plate at : 1 engine oil at 200 oc is forced over a 20-cm-square plate at a velocity of 1.2 ms. the plate is heated to a uniform

User Account

All Pages