The reaction force at C (lb) for the beam below is:
(A) 675 lb
(B) 985 lb
(C) 775 lb
(D) 525 lb
(C) 775 lb
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What is quantum mechanics?
A) a branch of physics that applies on very small scales B) the idea that mechanics can be understood only if we first understand quantum C) the idea that quantitative methods are needed to understand physics D) a branch of physics that deals with the curvature of spacetime E) a branch of physics that deals with the properties of gases
A starship navigator measures the distance between the Earth and the Sun. If the ship is moving at a speed of 0.90c, instead of obtaining 93 million miles, the navigator measures a distance (in millions of miles) of
A. 41. B. 30. C. 80. D. 215. E. 90.
The most distant objects in our solar system are
A) in the Oort Cloud. B) in the Kuiper Belt. C) short period comets. D) the Trojan asteroids. E) the jovians.
Fluid Flow: Water flows through a horizontal pipe of cross-sectional area 10.0 cm2 at a pressure of 0.250 atm with a flow rate is 1.00 L/s. At a valve, the effective cross-sectional area of the pipe is reduced to 5.00 cm2. What is the pressure at the valve? The density of water is 1000 kg/m3, and treat it as an ideal incompressible fluid.
A. 0.110 atm B. 0.235 atm C. 0.200 atm D. 0.157 atm E. 7700 Pa