The SI base units for the spring constant are which of the following?
a. Kg/s2
b. kg/m2
c. kg/s2
d. Kg/m2
c
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What, approximately, are the dimensions of the smallest object on Earth that the astronauts can resolve by eye at 200 km height from the space shuttle? Assume ? = 500 nm light and a pupil diameter D = 0.50 cm. Assume eye fluid has an average n = 1.33.
A. 150 m B. 100 m C. 250 m D. 25 m E. 18 m
Which of the following lists the planets of our solar system in the correct order from closest to farthest from the Sun?
A) Earth, Mars, Mercury, Venus, Jupiter, Saturn, Uranus, Neptune B) Mercury, Earth, Venus, Mars, Jupiter, Saturn, Neptune, Uranus C) Mercury, Venus, Mars, Earth, Saturn, Jupiter, Neptune, Uranus D) Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune
For a projectile launched horizontally, the vertical component of a projectile's velocity
A) is zero. B) remains a non-zero constant. C) continuously increases. D) continuously decreases. E) any of the above, depending on position.
A spaceship is moving away from the earth with a constant speed of 0.80c. The spaceship fires a 28-kg missile with a speed of 0.50c relative to the spaceship
What is the speed of the missile measured by observers on the earth if the missile is fired (a) away from the earth? (b) toward the earth?