Newton's Second Law in 1 Dimension: A catcher stops a 0.15-kg ball traveling at 40 m/s in a distance of 20 cm. What is the magnitude of the average force that the ball exerts against his glove?
Fill in the blank(s) with the appropriate word(s).
600 N
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Fluid Flow: Water, which we can treat as ideal and incompressible, flows at 12 m/s in a horizontal pipe with a pressure of 3.0 × 104 Pa. If the pipe widens to twice its original radius, what is the pressure in the wider section?
A. 3.0 × 104 Pa B. 4.9 × 104 Pa C. 7.4 × 104 Pa D. 9.8 × 104 Pa
Suppose several forces are acting upon a mass m. The in = m refers to
A) any particular one of the forces. B) the vector sum of all the forces. C) the force of friction acting upon the mass. D) the arithmetic sum of all the forces. E) the arithmetic mean of all the forces.
A goldfish bowl is spherical, 8.0 cm in radius. A goldfish is swimming 3.0 cm from the wall of the bowl. Where does the fish appear to be to an observer outside?
The index of refraction of water is 1.33. Neglect the effect of the glass wall of the bowl. A) 3.3 cm inside the bowl B) 3.9 cm inside the bowl C) 2.5 cm inside the bowl D) 3.0 cm inside the bowl E) 1.7 cm inside the bowl
A 360-nm thick oil film floats on the surface of a pool of water water. The indices of refraction of the oil and the water are 1.5 and 1.33, respectively
When the surface of the oil is illuminated from above at normal incidence with white light, what are the two wavelengths of light between 400 nm to 800 nm wavelength that are most strongly reflected? A) 430 nm and 720 nm B) 450 nm and 740 nm C) 490 nm and 780 nm D) 410 nm and 700 nm E) 470 nm and 760 nm