Calculations of the Sun's future evolution indicate that it will blow away almost half of its mass in several relatively short episodes about 4 to 5 billion years from now before it is finally extinguished
a. True
b. False
Indicate whether the statement is true or false
False
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What is the gravitational force on a 70. kg person on the Earth, due to the moon? The mass of the moon is 7.36 × 1022 kg and the distance to the moon is 3.82 × 108 m
What will be an ideal response?
An alpha particle is
a. a neutral helium atom. b. any positively charged nucleus. c. an x-ray. d. None of the above.
Two single charged ions moving perpendicularly to a uniform magnetic field (B = 0.40 T) with speeds of 5 000 km/s follow circular paths that differ in diameter by 5.0 cm. What is the difference in the mass of these two ions?
a. 2.6 × 10^?28 kg b. 6.4 × 10^?28 kg c. 3.2 × 10^?28 kg d. 5.1 × 10^?28 kg e. 1.1 × 10^?28 kg
A particle is acted upon by only two forces, one conservative and one nonconservative and neither being a force of friction, as it moves from point A to point B. The kinetic energies of the particle at points A and B are equal if
a. the sum of the works of the two forces is zero. b. the work of the conservative force is equal to the work of the nonconservative force. c. the work of the conservative force is zero. d. the work of the nonconservative force is zero. e. None of the above.