A car is rounding the top, or crest, of a hill while moving at a steady 50 km/hr. What can you say about this car's acceleration, and why?
A) The car is not accelerated, because neither its direction of motion nor its speed are changing.
B) The car is accelerated, because its speed is changing.
C) The car is not accelerated, because its speed is not changing.
D) The car is not accelerated, because its direction of motion is not changing.
E) The car is accelerated, because its direction of motion is changing.
E
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Wave Characteristics: A cordless phone operates at 900 MHz. What is the wavelength of the electromagnetic wave used by this phone? (c = 3.0 × 108 m/s)
Fill in the blank(s) with the appropriate word(s).
If a fluid does not change density as it moves, the fluid is undergoing
A) laminar flow. B) turbulent flow. C) irrotational flow. D) steady flow. E) incompressible flow.
A time-varying electric field produces a time-varying magnetic field
Indicate whether the statement is true or false
The ?0 meson has a mass of 264 times that of an electron
What is the approximate range of the force mediated by this particle? (melectron = 9.11 × 10-31 kg, c = 3.00 × 108 m/s, h = 6.626 × 10-34 J ? s) A) 1.5 × 10-14 m B) 1.5 × 10-10 m C) 1.5 × 10-12 m D) 1.5 × 10-15 m