All the constellations in the sky were created by the Greeks
a. True
b. False
Indicate whether the statement is true or false
False
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Water is being sprayed from a nozzle at the end of a garden hose of diameter 2.25 cm. If the nozzle has an opening of diameter 1.30 cm, and if the water leaves the nozzle at a speed of 14.0 m/s, what is the speed of the water inside the hose?
a. 4.67 m/s b. 41.9 m/s c. 2.38 m/s d. 5.67 m/s e. also 14.0 m/s
Significant Figures: The length and width of a rectangle are 1.125 m and 0.606 m, respectively. Multiplying, your calculator gives the product as 0.68175. Rounding properly to the correct number of significant figures, the area of the rectangle should be written as
A. 0.68 m2 B. 0.682 m2 C. 0.6818 m2 D. 0.68175 m2
Equilibrium: A store's sign has a mass of 20 kg and is 3.0 m long. It is uniform, so its center of gravity is at the center of the sign. It is supported horizontally by a small loose bolt attached to the wall at one end and by a wire at the other end, as shown in the figure. What is the magnitude of the net force that the bolt exerts on the sign?
A. 460 N B. 230 N C. 200 N D. 120 N E. 300 N
Ball A is thrown upward with a velocity of 19.6 m/s. Two seconds later ball B is thrown upward with a velocity of 9.8 m/s. Which ball is first to return to the thrower's hand?
A. A will arrive first B. B will arrive first C. A and B will arrive at the same time