What are atomic bombs made out of

Just wondering

Fuel cells have been proposed for use in cars and for power generation as part of a hydrogen economy. They offer the advantages of higher efficiency and cleaner fuel with insignificant pollutants.

how much time does it take for a product depivery plane flying at a speed of 145 kilometers to travel a distance of 1800 kilometers?

Around the 1760s what allowed for more supplies to be moved around? Group of answer choices trade winds the jet stream canal systems a free trade agreement

A square isothermal chip is of width w = 5 mm on a side and is mounted in a substrate such that its side and back surfaces are well insulated; the front surface is exposed to the flow of a coolant at T[infinity] = 15°C.

Define the stress and strength? A material has yield strength 100 kpsi. A cantilever beam has length 10 in and a load of 100 Lbf is applied at the free end. The beam cross section is rectangular 2""x5'.

A (n) 78-hp compressor in a facility that operates at full load for 2500 h a year is powered by an electric motor that has an efficiency of 93 percent. If the unit cost of electricity is $0.

What design advantages can you identify in the location of the controller

A dam 75 ft wide, with a nominal flow rate of 260 ft3/s, is to be studied with a scale model 3 ft wide, using Froude scaling as the most important similarity parameter.

The primary heat transfer mechanism that quickly warms my hand if I hold it directly above a campfire is: a) - Radiation b) - Inductance c) - Convection d) - Conduction

A long thin copper rod (K = 377 W/m K) 10 mm in diameter is exposed to an environment at 22 oC. The base temperature of the rod is maintained at 150 oC. The heat transfer coefficient between the rod and the environment is 11 W/m2 K.