What are the benefits of living near a volcano?
What will be an ideal response?
Geothermal energy, more oxygen and temperature changes, water is closer, you can create energy systems
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A newly discovered planet has twice the mass and three times the radius of the earth. What is the free-fall acceleration g at the surface of the earth?
a. 2/9 g b. 2/3 g c. 3/4 g d. 4/3 g
Which of the following correctly describes the relationship between Newton's theory of gravity and general relativity?
A) Newton's theory of gravity is now known to be false, and we were previously misled to think it was true by measurement errors. B) Newton's theory of gravity and general relativity give the same answers, but the former tells us to think of gravity as a force and the latter tells us to think of gravity as curvature of spacetime. C) Newton's theory of gravity is an approximation to general relativity that works when gravity is relatively weak, but breaks down when gravity is strong. D) General relativity applies at the sub-atomic level, but Newton's theory of gravity does not.
Three capacitors, of capacitance 5.00 ?F, 10.0 ?F, and 50.0 ?F, are connected in series across a 12.0-V voltage source. (a) How much charge is stored in the 5.00-?F capacitor? (b) What is the potential difference across the 10.0-?F capacitor?
What will be an ideal response?
A rocket with an initial mass of 1 000 kg adjusts its thrust by varying the rate at which mass is ejected. The ejection speed relative to the rocket is 40 km/s. If the acceleration of the rocket is to have a magnitude of 20 m/s2 at an instant when its mass is 80% of the original mass, at what rate is mass being ejected at that instant? Ignore any external forces on the rocket
a. 0.40 kg/s b. 0.50 kg/s c. 0.60 kg/s d. 0.70 kg/s e. 0.80 kg/s