Which type of force would be the equal and opposite force to a gravitational force?
a. gravitational
b. electromagnetic
c. strong
d. weak
e. It could be any one of the above or some combination of them.
A
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A flat circular coil having 57 turns of very thin wire has a diameter of 9.5 cm and carries 7.2 A of current. (?0 = 4? × 10-7 T ? m/
A) (a) What is the strength of the magnetic field at the center of the coil? (b) If the same length of wire were used to make a coil with twice the original diameter, how large would the magnetic field at the center be when it carried the same current as before?
Symbols on a weather map are called
A) isobars. B) data. C) weather elements. D) weather codes.
In ultrasound the wavelength of the sound is much smaller than in normal sound
Indicate whether the statement is true or false