Which of the following colors travels most quickly through glass or plastic?
A. green
B. red
C. blue
D. orange
E. yellow
Answer: B
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A point charge Q is placed on the x axis at the origin. An identical point charge is placed on the x axis at x = ?1.0 m and another at x = +1.0 m. If Q = 40 ?C, what is the magnitude of the electrostatic force on the charge at x = +1.0 m?
A. 29 N B. 14 N C. 11 N D. 18 N E. 7.0 N
The mass of the Moon is about 1/80th of the mass of Earth. The force exerted by Earth on the Moon is about 80 times that exerted by the Moon on Earth
Indicate whether the statement is true or false
Why does one cycle of lunar phases take 29.53 days even though the Moon orbits Earth in 27.32 days?
What will be an ideal response?
Thermal Expansion: The coefficient of linear expansion for aluminum is 1.8 × 10-6 K-1. What is its coefficient of volume expansion?
A. 9.0 × 10-6 K-1 B. 5.8 × 10-18 K-1 C. 5.4 × 10-6 K-1 D. 3.6 × 10-6 K-1 E. 0.60 × 10-6 K-1