A ball is thrown straight upward with an initial speed of 30 m/s. Assuming there is no air resistance, how high does the ball go before falling back down?
45.9 m
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The fundamental force underlying all chemical reactions is
A) gravitational. B) nuclear. C) centripetal. D) electrical. E) none of the above
Consider methods to identify the major polluters from among the many cars on the road (a few are responsible for most of the pollution). List as many as you can and explain how they can help reduce the problem
How many of these do you know are being used in your state?
The power factor of an ac RL circuit with a 100-? resistor and a certain inductor is 0.60. What is the impedance of the circuit?
A) 85 ? B) 170 ? C) 340 ? D) 100 ? E) 60 ?
Significant Figures: To get to her physics class, Alice walks 0.25 mi to the bus stop. She takes the bus 1.2 mi to the train station. She takes the train 13 mi and walks the remaining 0.17 mi to her class. How far is her commute expressed to the correct number of significant figures?
A. 14.6 mi B. 10 mi C. 15 mi D. 14.62 mi E. 14.620 mi