A digital thermometer can make readings to the tenth of a degree at either the Celsius setting or the Fahrenheit setting. Which reading would be more precise?
a. The Fahrenheit setting, since 1 degree Fahrenheit is smaller than 1 degree Celsius
b. The Fahrenheit setting, since 1 degree Celsius is smaller than 1 degree Fahrenheit
c. The Celsius setting, since 1 degree Fahrenheit is smaller than 1 degree Celsius
d. The Celsius setting, since 1 degree Celsius is smaller than 1 degree Fahrenheit
a
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An electron traveling due North with speed 4 × 105 m/s enters a region where the earth's magnetic field has the magnitude 5 × 10-5 T and is directed downward at 45° below horizontal. What magnitude force acts on the electron?
What will be an ideal response?
A 1.00 kg mass is connected to a spring with a spring constant of 9.00 N/m. If the initial velocity is 4.00 cm/s and the initial displacement is 0.00 cm, then what is the maximum spring potential energy of the simple harmonic motion?
A. 
B. 
C. 
D. 
E. 
If the efficiency of a reversible engine is 28%, what is its COP (performance coefficient) operated (a) as a refrigerator, and (b) as a thermodynamic pump?
What will be an ideal response?
Which part of the electromagnetic spectrum would we use to study the relatively cool dust of interstellar space?
A. visible light B. radio waves C. gamma rays D. ultraviolet light E. infrared light