A wire carrying a current that placed in a magnetic field will experience a maximum force if the angle between the direction of the current and the direction of the magnetic field is 60°
Indicate whether the statement is true or false
FALSE
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Why can't S waves travel through Earth's liquid core? a. Earth's liquid core is creating its own S waves
b. Earth's liquid core causes the seismic activity to be reflected back to its origin. c. Earth's liquid core absorbs the waves. d. Earth's liquid core is too hot and changes the wavelength of the S wave. e. Earth's liquid core does not have the rigidity required for shear waves to travel along.
The colonization of land by plants appears to have begun about
A) 542 million years ago B) 360 million years ago C) 65 million years ago D) 475 million years ago
A space station of diameter 80 m is turning about its axis at a constant rate. If the acceleration of the outer rim of the station is 2.5 m/s2, what is the period of revolution of the space station?
a. 22 s b. 19 s c. 25 s d. 28 s e. 40 s
What observational evidence do we have that black holes exist?
What will be an ideal response?