According to special relativity
1) space and time are aspects of each other.
2) mass and energy are aspects of each other,
3) both of the above,
4) neither of the above,
and the underlying postulate of special relativity is
5) F = ma.
6) E = mc2.
7) that the speed of light has a constant value for all observers.
Answer: 3, 7
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A ?- particle is also known as
A) an electron. B) a positron. C) a helium nucleus. D) a high-energy photon.
Why do Terrestrial planets not have rings? a. Terrestrial planets rotate in the opposite direction of the Sun
b. Terrestrial planets do not have large enough masses to retain particles in rings. c. Terrestrial planets have a core too rich in heavy metals to retain rings. d. Terrestrial planets are too close to the Sun to support a ring system. e. Terrestrial planets are not gaseous bodies.
Electrical and gravitational forces follow similar equations with one main difference:
A) Electrical forces obey the inverse square law and gravitational forces do not. B) Gravitational forces obey the inverse square law and electrical forces do not. C) Electrical forces attract and gravitational forces repel. D) Electrical forces repel and gravitational forces attract. E) Gravitational forces are always attractive but electrical forces can be attractive or repulsive.
A 0.28-kg stone you throw rises 34.3 m in the air. The magnitude of the impulse the stone received from your hand while being thrown is
a. 0.27 N s. b. 2.7 N s. c. 7.3 N s. d. 9.6 N s. e. 34.3 N s.