Physics, 17.03.2020 02:06, walkerrwilson
Cast-iron cannonballs used in the War of 1812 were occasionally heated for some extended time, so that when fired at houses and ships, they would set them on fire. If one of these cannonballs with a 20 cm diameter were at a uniform temperature of 1100 K, what heat flux value would exist if it were placed in still air at 300 K? You may assume no thermal radiation effects. Assume air is an ideal gas. Properties of air: k = 52.4 × 10-3W/m∙K, Pr = 0.601, kinematic viscosity ν = 68.1 × 10-6 m2/s. Use the following natural convection correlation for spheres: NuD = 2 + 0.43 RaD1/4
Answers: 1
Physics, 22.06.2019 08:00, hartzpeyton136
5g of ammonium nitrate was dissolved in 60g of water in an insulated container. the temperature at the start of the reaction was 23.0°c and at the end it was 19.0°c. calculate the energy absorbed by the reaction.
Answers: 3
Physics, 22.06.2019 11:30, georgesarkes12
1. a camcorder has a power rating of 19 watts. if the output voltage from its battery is 7 volts, what current does it use?answer units 2. a 1.5m wire carries a 6 a current when a potential difference of 57 v is applied. what is the resistance of the wire? your
Answers: 2
Physics, 22.06.2019 21:10, bensleytristap93y8q
A10-kg isto a of 10 m at aa0.9 kg/m.30 kg of ,at aas10-m .. ( 9.8 m/s2 g.)
Answers: 3
Cast-iron cannonballs used in the War of 1812 were occasionally heated for some extended time, so th...
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