Consider the planet Mars: [Earth mass = 6.0 × 1024 kg = 9.3 × Mars mass; Earth radius = 6380.km = 1.89 × Mars radius] What is the acceleration of gravity on Mars?
What will be an ideal response?
3.8 m/s2
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Water at room temperature, 20°C, is pumped into a reactor core where it is converted to steam at 200°C. How much heat (in J) is transferred to each kilogram of water in this process? (csteam = 2 010 J/kg?°C; LV,steam = 2.26 × 103 J/g; 1 cal = 4.186 J.)
A. 3.35 × 105 B. 7.53 × 105 C. 2.67 × 106 D. 2.80 × 106 E. 3.01 × 106
A decoration, of mass M, is suspended by a string from the ceiling inside an elevator. The elevator is traveling UPWARD with a constant speed. The tension in the string is
A) greater than Mg. B) less than Mg. C) equal to Mg. D) impossible to tell without knowing the speed. E) impossible to tell without knowing the decoration mass.
Charge of uniform density (0.30 nC/m2) is distributed over the xy plane, and charge of uniform density (-0.40 nC/m2) is distributed over the yz plane. What is the magnitude of the resulting electric field at any point not in either of the two charged planes?
a. 40 N/C b. 34 N/C c. 28 N/C d. 46 N/C e. 6.0 N/C
A device that measures absolute air pressure is called a barometer
Indicate whether the statement is true or false