The central part of Earth's core is solid
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A teacher sends her students on a treasure hunt. She gives the following instructions: 1. Walk 300 m north 2. Walk 400 m northwest 3. Walk 700 m east-southeast and the treasure is buried there
As all the other students walk off following the instructions, Jane physics student quickly adds the displacements and walks in a straight line to find the treasure. How far and in what direction does Jane need to walk? A) 187 m in a direction 67.3° north of east B) 481 m in a direction 40.9° north of east C) 399 m in a direction 52.5° north of east D) 284 m in a direction 28.2° west of north E) The treasure position cannot be reached in one straight walk.
A highway curve of radius 100 m, banked at an angle of 45°, may be negotiated without friction at a speed of
A) 22 m/s. B) 31 m/s. C) 44 m/s. D) 67 m/s.
Momentum: Two satellites with equal masses of 100 kg are traveling toward each other in deep space. One is traveling at 0.650c and the other at 0.850c. The satellites collide and somehow manage to stick together. What is the mass of the combined object after the collision?
A. 100 kg B. 200 kg C. 277 kg D. 378 kg E. 312 kg
The Earth's atmosphere is the major factor limiting the use of ground-based radio telescopes
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