Rupel pushes a box 4.00 m by applying a 25.0-N horizontal force. What work does she do?
a. 10.0 J
b. 100 J
c. 125 J
d. 550 J
B
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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
As shown in the figure, a container has a vertical tube, whose inner radius is 32.00 mm, connected to it at its side. An unknown liquid reaches level A in the container and level B in the tube level A being 5.0 cm higher than level B. The liquid supports a 20.0 cm high column of oil, between levels B and C, whose density is 460 kg.m-3. What is the density of the unknown liquid?
A. 1800 kg/m3
B. 1600 kg/m3
C. 1400 kg/m3
D. 2000 kg/m3
E. 1700 kg/m3
Which one of the following quantities is the smallest unit of thermal energy?
A) calorie B) kilocalorie C) Btu D) joule
Most surface ocean currents are due to
A) melting polar glaciers. B) river flow into the ocean. C) winds. D) density differences in the vertical profile of the ocean.