consequence of the Heisenberg Uncertainty Principle is that in the quantum mechanical picture of the atom, the solid electrons, as pictured in earlier models of the atom, are replaced by . A. probability distributions of the electrons (electron clouds) B. concentric spheres around the nucleus C. measurable electron density in the nucleus D. fuzz on the surface of the nucleus E. concentric circles around the nucleus

Air pressure is measured in pascals. for a professional american football game, the ball should be inflated to about 90,000 pascals. scientists studied the effects of air temperature on the pressure inside american footballs by taking these steps: 1. prepare 100 footballs. 2. measure each football's air pressure. 3. divide footballs into 10 groups. 4. place the groups in different lockers cooled to different air temperatures. 5. after 12 hours, remove the footballs from lockers. 6. measure each football's pressure again. 7. compare the new pressures to the starting pressures. what two terms best describe the variable "air pressure inside the football" in this experiment? independent, qualitative independent, quantitative dependent, qualitative dependent, quantitative