A spherical object 25.0 cm in diameter having an emissivity of 0.800 is held at a temperature of 275°C by an internal heater
This object is embedded in a very large vat of water at 100.0°C and atmospheric pressure. At what maximum rate (in g/min) is the water evaporating in the vat due to the radiated heat it receives from the object? You can ignore any heat radiated by the water. The latent heat of fusion for water is 33,400 J/kg, its latent heat of vaporization is 2.26 × 106 J/kg, and the Stefan-Boltzmann constant is 5.670 × 10-8 W/m2 • K4.
21.3 g/min
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Organisms whose cells lack a nucleus are called
A) prokaryotes B) eukaryotes C) non-nucleotes D) karyokes
The figure shows a ‘snapshot’ of four different waves in identical ropes stretched with the same force
The waves with the largest wavelength are waves __________ and ___________.
Use of a parabolic mirror, instead of one made of a circular arc surface, can be used to reduce the occurrence of which of the following effects?
a. mirages c. chromatic aberration b. spherical aberration d. light scattering
A long solenoid has a radius of 2.0 cm and has 700 turns/m. If the current in the solenoid is decreasing at the rate of 8.0 A/s, what is the magnitude of the induced electric field at a point 2.5 cm from the axis of the solenoid?
a. 56 mV/m b. 8.8 mV/m c. 88 mV/m d. 69 mV/m e. 44 mV/m