Which of the following is conserved?
a. Protons.
b. Electrons.
c. Element Identity.
d. Atomic Number.
e. Nucleons.
e
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A torque of 12 N • m is applied to a solid, uniform disk of radius 0.50 m, causing the disk to accelerate at 5.7 rad/s2. What is the mass of the disk?
A) 17 kg B) 13 kg C) 8.5 kg D) 4.3 kg
White dwarfs were once the cores of stars that produced planetary nebulae
Indicate whether the statement is true or false
Molecular Bonds: Covalent bonding is due to
A. the sharing of electrons between atoms. B. the transfer of electrons between atoms. C. unequal charge distributions around neutral molecules. D. atoms bonding to hydrogen molecules.
Doppler radar is replacing conventional radar in weather forecasting because
a. it can measure wind speeds. b. Doppler radar is widely used in police cars. c. it is cheaper. d. government agencies are required to use the latest equipment.