Is it possible for the total mechanical energy of a moving particle to be negative?
a. No, because a moving particle has positive kinetic energy.
b. No, because potential energy cannot have a value more negative than the value of the positive kinetic energy of the particle.
c. Only if friction is involved.
d. yes
d
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What is the process in which a nucleus of an atom breaks up, emitting subatomic particles and/or energy?
a. radioactive decay b. radioactive isotyping c. unstable atomic nucleus d. electron release e. free radical release
A constant-volume gas thermometer is used to measure the temperature of an object. When the thermometer is in contact with water at its triple point (273.16 K) the pressure in the thermometer is 8.500 × 104 Pa. When it is in contact with the object the pressure is 9.650 × 104 Pa. The temperature of the object is:
A. 37.0 K B. 241 K C. 310 K D. 314 K E. 2020 K
An astronaut who weighs 800 N on the surface of the Earth lifts off from planet Zuton in a space ship. The free-fall acceleration on Zuton is 3.0 m/s2 (down). At the moment of liftoff the acceleration of the space ship is 0.50 m/s2 (up). What is the magnitude of the force of the space ship on the astronaut?
A. 41 N B. 0.29 kN C. 0.24 kN D. 0.20 kN E. 0.37 kN
Consider a situation where you carry a 20-N box up a flight of stairs, raising its elevation by 5 m.You drop the box. As it falls to its original level, its kinetic energy is __________
Fill in the blank(s) with correct word