You can see a clock in a spaceship moving past you at 90% of the speed of light. According to you, how much time would pass while the clock in the spaceship ticked through one minute?
A) more than one minute
B) less than one minute
C) A minute is the same on the ship as it is for you.
D) A minute on the ship is exactly two minutes for you.
A
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A velocity selector uses a fixed electric field of magnitude E and the magnetic field is varied to select particles of various energies. If a magnetic field of magnitude B is used to select a particle of a certain energy and mass, what magnitude of magnetic field is needed to select a particle of equal mass but twice the energy?
a. 0.50 B b. 1.4 B c. 2.0 B d. 0.71 B e. 1.7 B
Two identical arrows, one with twice the speed of the other are fired into a bale of hay. The faster arrow will penetrate the bale
A) the same distance as the slower arrow. B) twice as far as the slower arrow. C) four times as far as the slower arrow. D) more than four times as far as the slower arrow. E) none of the above
For glucose dissolving in water at 298 K, the diffusivity is 6.9 x 10^-10 m^2/s. What do you expect the diffusivity of water in glucose to be?
What will be an ideal response?
The solar system contains about 100 billion stars
Indicate whether the statement is true or false