(5 points) A 1000-kg car traveling initially with a speed of 20 m/s in an eastern direction crashes into the rear end of
Posted: Mon May 23, 2022 11:06 am
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(5 points) A 1000-kg car traveling initially with a speed of 20 m/s in an eastern direction crashes into the rear end of 2000-kg truck moving in the same direction with a speed of 10 m/s. The velocity of the car right after the collision is 15 m/s to the east. What is the velocity of the truck after the collision? a. 2.5 m/s O b. 12.5 m/s C. 0 m/s O d. 7.5 m/s
(5 points) Which of the below indicates that the collision is elastic? a. No correct choice is available in the list O b. Both objects get stuck together after collision C. Objects are deformed after collision O d. Objects are hotter after collision
(5 points) The lowest-energy photon observed in the vibrational spectrum of a certain quantum harmonic oscillator is 0.11 eV. What is the energy of a photon emitted in a transition from the 4th excited state to the ground state? a. 0.1 eV b. 0.4 eV C. 0.44 eV O d. 0.11 eV
(5 points) In a perfectly elastic collision, momentum and kinetic energy of both colliding objects: a. Become zero b. Remain the same C. Increase O d. Decrease
(5 points) Which choice in the list below corresponds to a correct unit of Planck's constant? a. eV.s O b. eV/s O C. J.S2 O d. J/s
(5 points) The ground state and the first three excited states of this harmonic oscillator are occupied. How many different photon energies will appear in the emission spectrum? E. a. 4 O O b. 2 C. O O d. 6 O O e. 1