Ben leaves his home and walks to the bank, then back home in a total of 30 minutes. What is his average speed?
A. 1/3 block/min
B. 0 blocks/min
C. 1/6 block/min
D. 10 blocks/min
A. 1/3 block/min
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A current loop is placed in a magnetic field as indicated. Will the loop tend to rotate (viewed from above) clockwise, counterclockwise, or not at all about a vertical axis?
A. clockwise
B. counter-clockwise
C. not at all
A tuning fork is sounded above a resonating tube (one end closed), which resonates at a length of 0.40 m and again at 1.2 m. If the tube length were extended further, at what point will the tuning fork again create a resonance condition?
a. 1.6 m b. 2.0 m c. 2.4 m d. 3.2 m e. 6.4 m
The surface temperature of Venus is 750K, even hotter than Mercury
Indicate whether the statement is true or false
Which of the following is the most precise method for measuring the mass of a galaxy?
A) The parallax method B) The rotation curve method C) The visual field test D) Colorimetry