The recently dwarf planet Eris has an orbital period about the Sun, P, of 557 years. According to Kepler's 3rd Law, what is the semi-major axis, a, of its orbit?
A) 55.7 AU
B) 38.4 AU
C) 72.1 AU
D) 67.7 AU
D
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A vertical wire carries a current vertically upward in a region where the magnetic field vector points toward the north. What is the direction of the magnetic force on this current due to the field?
A) downward B) toward the north C) toward the south D) toward the east E) toward the west
Suppose you wanted to show the Sun on the same scale. About how big would it need to be?
A) 3.5 centimeters in diameter (the size of a golf ball) B) 35 centimeters in diameter (a little bigger than a basketball) C) 3.5 meters in diameter (about 11-1/2 feet across) D) 3.5 kilometers in diameter (the size of a small town)
Kirchhoff's Rules: For the circuit shown in the figure, R1 = 50 ?, R2 = 20 ?, R3 = 35 ?, R4 = 10 ?, R5 = 68 ?, I1 = 0.111 A, I2 = 0.142 A, and the batteries are ideal.(a) Determine V1 and V2.(b) What is the potential difference across R4?
What will be an ideal response?
A Young's double-slit apparatus is set up so that a screen is positioned 1.6 m from the double slits, and the spacing between the two slits is 0.0315 mm. What is the distance between alternating bright fringes on the screen if the light source has a wavelength of 630 nm? (1 nm = 10-9 m)
a. 0.016 m c. 0.025 m b. 0.047 m d. 0.032 m