A 5.0-kg box slides on the surface on a ramp that rises at 37° above the horizontal. The coefficient of kinetic friction between the box and the surface of the ramp is 0.60
What are the magnitude and direction of the acceleration of the box if it is sliding (a) up the ramp, (b) down the ramp?
(a) 11 m/s2 down the ramp (b) 1.2 m/s2 down the ramp
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The source of energy in the Sun is
A. uranium chain reaction B. radioactivity of tritium C. fusion of hydrogen D. radioactivity of potassium-40
Which of the following is NOT included in the internal energy of a system?
A. the kinetic energy of the center of mass B. the kinetic energy of the individual particles C. the spring potential energy of the individual particles D. the chemical energy of the individual particles E. the nuclear energy of the individual particles
Which of the following is true regarding the masses of antimatter particles?
A) The mass of an antimatter particle is the same as that of its corresponding matter particle. B) The mass of an antimatter particle is always larger than that of its corresponding matter particle. C) The mass of an antimatter particle is always lower than that of its corresponding matter particle. D) The mass of an antimatter particle is the negative value of that of its corresponding matter particle. E) Antimatter has no mass.
What wavelength (in mm) is associated with the Paschen series for n = 4? (RH = 1.097 × 10^7 m-1)
a. 320 b. 530 c. 2.7 d. 1.9 e. 0.5