What happens to the core of a star after the planetary nebula stage?
it becomes a white drawf
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A proton (m = 1.7 × 10?27 kg, q = +1.6 × 10?19 C) starts from rest at point A and has a speed of 40 km/s at point B. Only electric forces act on it during this motion. Determine the electric potential difference VB?VA.
A. +8.5 V B. ?8.5 V C. ?4.8 V D. +4.8 V E. ?17 V
What is Boyle's law?
a. Gas temperature is a constant. b. Gas pressure is a constant. c. The product of gas volume and gas pressure is a constant. d. The product of gas temperature and gas pressure is a constant. e. The sum of gas temperature and gas pressure is a constant.
Terminal Voltage and Internal Resistance: A heating element having a resistance (at its operating temperature) of 148 ? is connected to a battery having an emf of 523 V and unknown internal resistance.It is found that heat energy is being generated in the resistance of the heating element at a rate of 66.0 W. What is the rate at which heat energy is being generated in the internal resistance of the battery?
Fill in the blank(s) with the appropriate word(s).
An automobile travels due north with a constant speed of 81 km/h. All forces considered, the unbalanced force acting on the auto is
a. zero. b. southward. c. northward. d. downward. e. upward.