Four of the five answers listed below are characteristics of water. Select the exception
a. Water stabilizes temperature.
b. Water is an excellent solvent.
c. Water has cohesion and surface tension.
d. Water produces salts.
e. Water is less dense when solid.
d
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Four point charges are located at the corners of a square, 1.00 m by 1.00 m. On each of two diagonally opposite corners are 1.00 ?C charges. On each of the other two corners are -1.00 ?C charges. What is the direction of the force on each charge?
A. positive charges away from away from the center of the square, negative inward toward center B. negative charges away from away from the center of the square, positive inward toward center C. positive and negative charges both toward the center of the square D. positive and negative charges both away from the center of the square E. no direction (net force = 0)
Thermal Expansion: A steel bridge is 1000 m long at -20°C in winter. What is the change in length when the temperature rises to 40°C in summer? The average coefficient of linear expansion of this steel is 11 × 10-6 K-1.
A. 0.33 m B. 0.44 m C. 0.55 m D. 0.66 m
The least massive stars, including our sun, eventually end their lives as
A) neutron stars. B) red giants. C) black holes. D) white dwarfs. E) quasars.
According to the "galactic fountain" model, what can create a superbubble emerging into the halo?
A) winds and jets from newly formed protostars B) a supernova occurring in the halo C) multiple supernovae occurring near one another around the same time D) the combined effect of spiral density waves E) molecular clouds expelled from the galactic center