Earthquake S waves are
a. transverse.
b. sometimes longitudinal and sometimes transverse.
c. longitudinal.
d. neither longitudinal nor transverse.
a
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A 2.8-kg tool can move on a perfectly smooth ramp that slants at 42° above the horizontal. What are the magnitude and direction of the acceleration of this tool if it is sliding (a) up the ram, (b) down the ramp?
What will be an ideal response?
Time Dilation: As measured in Earth's rest frame, a spaceship traveling at 0.9640c takes 10.5 y to travel between two planets that are not moving relative to each other. How long does the trip take as measured by someone on the spaceship?
A. 2.79 y B. 6.82 y C. 39.5 y D. 28.8 y
Elementary Particles: The proton is made up of which one of the following quark combinations (up, down, strange, charm, top, bottom)?
A. uud B. ddu C. udd D. ttb E. bst
A 1200 kg car is traveling at 4.00 m/s and strikes a wall. The 1200 kg car bounces off the wall with a velocity of 4.00 m/s. If the contact with the wall by the car lasts for 0.100 seconds, then the impulse on the car is
A. 12,400 kg m/s. B. 10,200 kg m/s. C. 9,600 kg m/s. D. 8,400 kg m/s. E. 2,900 kg m/s.