When an atom loses an electron, it becomes
A) sublimated. B) dissociated. C) a plasma. D) an isotope. E) ionized.
E
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You ride a motor scooter 8 km in 10 minutes. Your speed is
A) 24 km/hr. B) 40 km/hr. C) 16 km/hr. D) 32 km/hr. E) None of the above.
The near point of a farsighted person's uncorrected eyes is 80 cm. What power contact lens should be used to move the near point to 25 cm from this person's eyes?
A) 2.8 diopters B) -2.8 diopters C) -4.0 diopters D) -4.2 diopters E) 4.2 diopters
The separation of white light into its component colors is called
a. polarization. b. diffraction. c. dispersion. d. refraction.
Rotational Kinetic Energy: A hoop with a mass of 2.75 kg is rolling without slipping along a horizontal surface with a speed of 4.5 m/s when it starts down a ramp that makes an angle of 25° below the horizontal. What is the rotational kinetic energy of the hoop after it has rolled 3.0 m down as measured along the surface of the ramp?
A. 34 J B. 22 J C. 45 J D. 62 J E. This question cannot be answered without knowing the radius of the hoop.