Physics, 21.09.2019 16:10 AShevel6767
Which describes the difference between a bowling ball sitting in the rack waiting to be used and the bowling ball knocking pins down? a. in the rack, the bowling ball has only potential energy. as it knocks pins down, its potential energy has decreased, while its kinetic energy has increased.
b. in the rack and when knocking down pins, the potential energy and the kinetic energy of the bowling ball are equal.
c. in the rack, the bowling ball has no energy at all. as it knocks down the pins the energy is 75% kinetic and 25% potential.
d. in the rack, the bowling ball has only kinetic energy. as it knocks pins down, its potential energy has increased, while its kinetic energy has decreased.
Answers: 2
Physics, 22.06.2019 00:30
Ablock of steel has a density of 0.29lbs per cubic inch. if the block has dimensions of 1 inch by 1 inch by 3 inches, what is its weight? a. 0.29lbs b. 0.58lbs c. 0.87lbs d. 1lbs
Answers: 1
Physics, 22.06.2019 02:50
Ammonia enters the expansion valve of a refrigeration system at a pressure of 10 bar and a temperature of 18oc and exits at 6.0 bar. the refrigerant undergoes a throttling process. determine the temperature, in oc, and the quality of the refrigerant at the exit of the expansion valve.
Answers: 3
Physics, 22.06.2019 07:30
Automobile fuel efficiency is often measured in miles that the car can be driven per gallon of fuel (mpg). heavier cars tend to have lower fuel efficiencies (lower mpg ratings). which variable (weight or fuel efficiency) is most naturally considered the explanatory (predictor) variable in this context?
Answers: 3
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