此问题已重新计分。 Many economists would view market competition as supporting the invention of new technology because it单项选择题
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Many economists would view market competition as supporting the invention of new technology because it
4. The competitive market system: A. encourages innovation because government provides tax breaks and subsidies to those who develop new products or new productive techniques. B. discourages innovation because it is difficult to acquire additional capital in the form of new machinery and equipment. C. discourages innovation because firms want to get all the profits possible from existing machinery and equipment. D. encourages innovation because successful innovators are rewarded with economic profits.
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An object is fired from ground level at an angle of 31.9 degrees to the horizontal. Taking acceleration due to gravity = 7.65 ms-2 If the initial speed is 5.6 ms-1, how far from the starting point will it hit the ground? Assume air resistance is negligible.
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