The radius R of a nucleus of mass number A is given by R = R0 A1/3, where R0 = 1.2 × 10-15 m,
calculate the density of a nucleus that has contains 57 protons and 82 neutrons. The mass of a nucleon (proton or neutron) is 1.67 × 10-27 kg.
2.3 × 1017 kg/m3
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Which of the following would decrease the magnification of a compound microscope?
a. Replacing the objective lens with one of larger diameter. b. Replacing the eyepiece lens with one of shorter focal length. c. Replacing the eyepiece lens with one of smaller diameter. d. Replacing the objective lens with one of longer focal length.
A lump of clay is thrown at a wall. A rubber ball of identical mass is thrown with the same speed toward the same wall. Which statement is true?
a. The clay experiences a greater change in momentum than the ball. b. The ball experiences a greater change in momentum than the clay. c. The clay and the ball experience the same change in momentum. d. It is not possible to know which object has the greater change in momentum.
The mission of ___________ health is the fulfillment of society's interest in ensuring the conditions in which people can be healthy.
What will be an ideal response?
A repelling force must occur between two charged objects under which conditions?
a. Charges are of equal magnitude. c. Charges are of unequal magnitude. b. Charges are of unlike signs. d. Charges are of like signs.