Identical masses m are attached to identical springs of spring constant k suspended from the ceiling. With both masses hanging in their equilibrium positions, mass A is pulled down 10 cm and released while mass B is pushed up 10 cm and released. Which statement is correct?
a. Mass A will travel a smaller distance to its highest point than mass B will travel to its lowest point.
b. Mass A will travel a greater distance to its highest point than mass B will travel to its lowest point.
c. Masses A and B will travel equal distances between their highest and lowest points.
d. More work was done on mass A by the extending force than on mass B by the compressing force. e. The total work done on mass A by the extending force was equal to the total work done on mass B by the compressing force.
C
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A heat engine in each cycle absorbs energy from a reservoir as heat and does an equivalent amount of work, with no other changes. This engine violates:
A. the zeroth law of thermodynamics B. the first law of thermodynamics C. the second law of thermodynamics D. the third law of thermodynamics E. none of the above
When 241Am decays by emitting an alpha particle of kinetic energy 5.49 MeV, what is the recoil energy of the daughter nucleus?
A. 5.49 MeV B. 1.27 MeV C. 0.880 MeV D. 0.0930 MeV E. 0.0910 MeV
If an electron is accelerated from rest through a potential difference of 25,000 volts in a color television picture tube, its kinetic energy will be
A) 16 J. B) 2.5 × 104 J. C) 4.0 × 10-5J. D) 1.6 J. E) 4.0 × 10-15 J.
On a winter day the temperature drops from –5°C to –15°C overnight. If a pan sitting outside contains 0.40 kg of ice, how much heat is removed from the ice for this temperature change?