Physics, 18.11.2019 09:31 steelersfan4343
Aradioisotope is place near a radiation detector, which registers 80 counts per second. eight hours later, the detector registers five counts per section. what is the isotopeās half-life?
Answers: 1
Physics, 21.06.2019 20:50
Aball is thrown upward in the air, and its height above the ground after t seconds is h ( t ) = 57 t ā 16 t 2 feet. find the time t when the ball will be traveling upward at 14.25 feet per second.
Answers: 1
Physics, 21.06.2019 22:00
Na food processing facility, a spherical container of inner radius r1 5 40 cm, outer radius r2 5 41 cm, and ther- mal conductivity k 5 1.5 w/m Ā· k is used to store hot water and to keep it at 100Ā°c at all times. to accomplish this, the outer surface of the container is wrapped with a 800-w electric strip heater and then insulated. the temperature of the inner surface of the container is observed to be nearly 120Ā°c at all times. as- suming 10 percent of the heat generated in the heater is lost through the insulation, (a) express the differential equation and the boundary conditions for steady one-dimensional heat conduction through the container, (b) obtain a relation for the variation of temperature in the container material by solving the differential equation, and (c) evaluate the outer surface tempera- ture of the container. also determine how much water at 100Ā°c this tank can supply steadily if the cold water enters at 20Ā°c.
Answers: 2
Physics, 22.06.2019 06:00
An ideal gas is held in a container at constant volume. initially, its temperature is 5 degrees c and its pressure is 1.2 atm. what is its pressure when its temperature is 43 degrees c? answer in units of atm
Answers: 2
Physics, 22.06.2019 07:20
If 2 moles of co_2 at 2l and 500k are expanded reversibly to 20l, more work can be obtained from an adiabatic process than from an isothermal process. is the above statement true or false?
Answers: 3
Aradioisotope is place near a radiation detector, which registers 80 counts per second. eight hours...
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