Physics, 22.10.2020 19:01 tsadface21
Juan argues that when you burn coal, you use up the coal, and hence you use up all of its energy, and this results in a net loss of energy in the universe. How could you fix Juan's argument? The total energy in the universe remains constant because .
A. the chemical energy in the coal is converted into thermal energy
B. the kinetic energy in the coal is converted into potential energy
C. the elastic potential energy in the coal is converted into thermal energy
D. the gravitational potential energy is converted into elastic potential energy
Answers: 2
Physics, 22.06.2019 20:30
Your friend increases her force on the desk by 30n . she doesn't change the direction of her push . what happens to the net force on the desk .will the desk accelerate
Answers: 2
Physics, 23.06.2019 12:20
The lid of a pressure cooker forms a nearly airtight seal. steam builds up pressure and increases temperature within the pressure cooker so that food cooks faster than it does in an ordinary pot. the system is defined as the pressure cooker and the water and steam within it. if 2.0 g of water is sealed in a pressure cooker and then vaporized by heating, and 5655 j must be added as heat to completely vaporize the water, what is the change in the system’s internal energy? answer in units of j.
Answers: 3
Physics, 23.06.2019 12:50
Aspring with an unstrained length of 0.071 m and a spring constant of 2.6 n/m hangs vertically downward from the ceiling. a uniform electric field directed vertically upward fills the region containing the spring. a sphere with a mass of 5.29 10-3 kg and a net charge of +7.2 µc is attached to the lower end of the spring. the spring is released slowly, until it reaches equilibrium. the equilibrium length of the spring is 0.058 m. what is the magnitude of the external electric field?
Answers: 1
Physics, 23.06.2019 19:00
If a rock has a density of 2g/cm³ and a volume of 8cm³, what is its mass? a. 4 gb. 128 gc. 16 gd. 0.25 g
Answers: 1
Juan argues that when you burn coal, you use up the coal, and hence you use up all of its energy, an...
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