While running, a person dissipates about 0.6 J of mechanical energy per step per kilogram of body mass. If a 60-kg person runs with a power of 70 Watts during a race, how fast is the person running? Assume a running step is 1.5 m long
2.92 m/s
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When water freezes, it expands about nine percent. What would be the pressure increase inside your automobile engine block if the water in there froze? The bulk modulus of ice is 2.0 × 10^9 N/m2, and 1 atm= 1.01 × 10^5 N/m2
a. 18 atm b. 360 atm c. 1100 atm d. 1600 atm e. 600 atm
Navigators can find their latitude in the northern hemisphere by measuring the angle from the northern horizon to the north celestial pole
a. True b. False Indicate whether the statement is true or false
A cloud fragment too small to form a star becomes:
A) a red giant. B) a black hole. C) a brown dwarf. D) a T Tauri object. E) a Herbig Haro object.
What is the potential difference between the ends of bulb A?
A. 1.5 V
B. 1.2 V
C. 0.5 V
D. 0.3 V
E. 0.15 V
F. Some other value (specify)