Physics, 07.10.2020 06:01 iicekingmann
[16 POINTS: 3 Physics Q’s]
9. What is the difference between contact forces and field forces?
11. As an object falls through Earth’s atmosphere, which statement correctly describes the energy change (assume no friction or drag)
A. The potential energy of an object decreases while the thermal energy increases.
B. The kinetic energy of the object increases while the elastic energy increases.
C. The potential energy of the object decreases while the kinetic energy increases.
D. The thermal energy of the object decreases while the kinetic energy increases.
12. Which of the following is true about the charge of an electron?
A. It is 1.602 x 10^-19 C, and the smallest unit of charge
B. It is -1.602 x 10^-19 and the smallest unit of charge.
C. It is -1.602 x 10^-9 , and it a multiple of the smallest unit of charge.
D. It is 1.602 x 10^-19, and it is a multiple of the smallest unit of charge.
*Thanks in advance* ❤️
Answers: 1
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Which law represents the thermodynamic statement of the conservation of energy of a system? a. the fourth law b. the first law c. the second law d. the third law
Answers: 2
Physics, 22.06.2019 04:40
How is the gravitational force related to the distance between two objects?
Answers: 1
Physics, 22.06.2019 10:30
Air is to be preheated by hot exhaust gases in a cross-flow heat exchanger before it enters the furnace. air enters the heat exchanger at 95 kpa and 20°c at a rate of 0.6 m^3/s. the combustion gases (cp = 1.10 kj/kg°c) enter at 160°c at a rate of 0.95 kg/s and leave at 95°c. determine the rate of heat transfer to the air and its outlet temperature.
Answers: 2
Physics, 22.06.2019 14:30
Which one of the following terms is used to indicate the natural tendency of an object to remain at rest or in motion at a constant speed along a straight line? velocity acceleration equilibrium force inertia
Answers: 2
[16 POINTS: 3 Physics Q’s]
9. What is the difference between contact forces and field forces?
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