A supertrain (rest-length = 100 m) travels at a speed of 0.950c as it passes through a tunnel (rest-length 50.0 m). As seen by a trackside observer, is the train ever completely within the tunnel? If so, by how much?
yes, by 18.8 meters
Physics & Space Science
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A race car circles 10 times around an 8-km track in 20 min. What is its average velocity per lap?
What will be an ideal response?
Physics & Space Science
The acceleration of a ball as it rolls down a ramp is 4 m/s2 . The ball is referred to 2 s after it starts to roll. The acceleration after starting from rest is __________
Fill in the blank(s) with correct word
Physics & Space Science
By what factor is the capacitance of a metal sphere multiplied if its volume is tripled?
1.3 2.31/3 3.1 4.3-1/3 5.13
Physics & Space Science
How can the light reflected off a planet reveal information about its atmosphere, even though the planet is not creating this light?
What will be an ideal response?
Physics & Space Science