A mass sits at rest on top of a table. Which two forces are interaction pair forces and thus are equal and opposite?
A. the force of gravity on the mass due to the earth and the force of gravity on the earth due to the mass
B. the force of gravity on the mass due to the earth and the contact force on the table due to the mass
C. the contact force on the mass due to the table and the force of gravity on the earth due to the mass
D. the force of gravity on the mass due to the earth and the contact force on the mass due to the table
A. the force of gravity on the mass due to the earth and the force of gravity on the earth due to the mass
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The strength of a rock depends on its composition, its temperature, and the surrounding pressure
Indicate whether the statement is true or false
A parallel-plate capacitor with plate area A and plate separation d has a capacitance of 4 ?F with the gap between the plates unfilled. The gap is then filled with two dielectric materials, one with dielectric constant 2 and the other one with dielectric constant 6 . Each slab of dielectric has area A and thickness d/2, the layering of the dielectrics resulting in the gap being completely
filled. Which of the following combinations of capacitors will have the same capacitance as the newly filled parallel-plate one? a. two capacitors in parallel, one with capacitance of 8 ?F and the other with capacitance of 24 ?F b. two capacitors in series, one with capacitance of 8 ?F and the other with capacitance of 24 ?F c. two capacitors in parallel, one with capacitance of 16 ?F and the other with capacitance of 48 ?F d. two capacitors in series, one with capacitance of 16 ?F and the other with capacitance of 48 ?F e. two capacitors in parallel, one with capacitance of 8 ?F and the other with capacitance of 48 ?F
Which of the following was not a part of Dalton's atomic theory?
a. Each element is composed of atoms, which are identical for that element. b. The reactivity of elements involves changes in their electron configuration. c. Chemical combination is the bonding of a definite number of atoms of each of the combining elements. d. No atoms are gained, lost, or changed in identity during a chemical reaction.
A slit of width 2.0 ?m is used in a single slit experiment with light of wavelength 650 nm. If the intensity at the central maximum is Io, what is the intensity 10° from the center?
A) 0.53 Io B) 0.03 Io C) 0.43 Io D) 0.50 Io E) 0.35 Io