Which of the following forces is the strongest at near distances?
a. gravitational
c. strong nuclear
b. weak nuclear
d. electromagnetic
C
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At the ultimate tensile strength,
(a) The true stress is at its maximum. (b) The specimen always fractures. (c) The maximum load-carrying capacity is experienced. (d) The material yields.
Momentum: A satellite with a mass of 200 kg and a speed of 0.800c and a second satellite with a mass of 100 kg and a speed of 0.600c are traveling toward each other in deep space. The satellites collide and somehow manage to stick together. What is the speed of the combined object after the collision?
A. 0.333c B. 0.374c C. 0.397c D. 0.418c E. 0.432c
If an observer on Earth sees the Moon to be full than at the same time, an observer on the Moon would see Earth to be at what phase?
What will be an ideal response?
Igneous rock is formed from
A) crystallization of molten magma. B) high temperatures and pressures. C) solidified lava beneath the Earth's surface. D) any of these