A scientist named ______________ discovered the neutron in 1932
Fill in the blank(s) with correct word
James Chadwick
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What process is illustrated in this diagram?
A) the spontaneous production of a particle and its antiparticle from energy B) the deliberate production of a particle and its antiparticle by shining two flashlight beams at each other C) the creation of antimatter from matter D) quantum tunneling of two particles through an energy barrier
According to modern science, what was the approximate chemical composition of the solar nebula?
A) 50% hydrogen and helium, 50% everything else B) 98% hydrogen and helium, 2% everything else C) 98% hydrogen, 2% helium D) roughly equal proportions of hydrogen, helium, water, and methane
The transmission of power from one place to another is evident in
A) household electricity. B) radio broadcast. C) mobile phones. D) all of the above
A 10 pound iron ball and a 2 pound iron ball are dropped simultaneously from a height of 100 meters. Neglecting air resistance, which ball will reach the ground first?
A. They will reach the ground at the same time B. The 10 lb ball C. The 2 lb ball