A martial arts woman breaks a board with a blow of 3000 N. The force that acts on her hand is
A. 3000 N.
B. less than 3000 N.
C. more than 3000 N.
D. not enough information
Answer: A
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The steepest natural angle that loose material can stand at without pieces sliding or rolling downslope is called the ____________________
Fill in the blank(s) with correct word
What is the colligative property that deals with the freezing point of water?
a. Sea ice forms at a higher temperature than freshwater ice. b. Salinity disrupts the hydrogen bonding in water and increases the freezing point. c. Salt crystals become incorporated into ice as it forms causing the temperature to increase. d. Salinity disrupts the hydrogen bonding in water and acts as a type of antifreeze. e. Lake ice forms at a lower temperature than sea ice.
Ice cores, such as the Vostok ice core, can be used to reconstruct temperature patterns indirectly, using ________.
A. oxygen isotopes of water in ice B. methane concentrations in gas bubbles C. dust content in ice D. carbon dioxide concentration in gas bubbles E. mercury concentrations in ice
The reason that precipitation forecasts are the least accurate of all meteorological predictions is
A) moisture cannot be accurately measured. B) moisture is discontinuous. C) because we do not have the capability to accurately track moisture. D) because moisture can indiscriminately change phases.