A spring-driven dart gun propels a 10. g dart. It is cocked by exerting a force of 20. N over a distance of 5.0 cm. With what speed will the dart leave the gun, assuming the spring has negligible mass?
What will be an ideal response?
10. m/s
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A certain factory whistle can be heard up to a distance of 2.5 km. Assuming that the acoustic output of the whistle is uniform in all directions, how much acoustic power is emitted by the whistle? The threshold of human hearing is 1.0 × 10-12 W/m2
A) 0.079 mW B) 0.26 mW C) 0.026 mW D) 2.6 mW E) 0.79 mW
Larger batteries have higher output voltages
a. True b. False Indicate whether the statement is true or false
When performing arithmetical operations using significant figures, how many significant digits can there be in a final answer that is obtained by multiplying or dividing the original recorded data?
The Great Dark Spot on Neptune is probably as stable as Jupiter's famed Great Red Spot
Indicate whether the statement is true or false