An infinite universe is a basic assumption of the cosmological principle
Indicate whether the statement is true or false
FALSE
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Which of the following statements about novae is true?
A) A star system that undergoes a nova may have another nova sometime in the future. B) A nova involves fusion taking place on the surface of a neutron star. C) A nova is the most powerful type of explosion ever seen in the universe. D) When a star system undergoes a nova, it brightens as much as a star system undergoing a supernova. E) A nova can occur on a single, isolated star.
The most important geological process that has removed craters from the northern plains of Mars is
A) plate tectonics B) wind erosion C) volcanism D) water erosion
The carburetor of a car is a pipe with a constriction. Compared to the velocity of flow of a mixture of air and gasoline in the main pipe, the velocity in the constriction will be ________. The pressure in the constriction will be ________ than the pressure in the main pipe.
Fill in the blank(s) with the appropriate word(s).
Light enters water (n = 1.33) from air. The incident light ray makes a 0.44° angle with the normal to the surface on the air side. What will be the angle made with the normal by the refracted ray on the water side?
A. Nearly 90° B. 1.58° C. 0.188° D. 0.33°