Atmospheric pressure at an altitude of 10,000 m is exactly half of what it is at 5,000 m
Indicate whether the statement is true or false
F
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The emf produced by an ac generator is given by 
NBA sin 
t. In the SI system, what is the value of 
for a frequency of 60.0 Hz?
A. 60.0 Hz
B. 120 rad/s
C. 2.00
rad/s
D. 377 rad/s
E. 377 Hz
Three identical point charges (+2.0 nC) are placed at the corners of an equilateral triangle with sides of 2.0-m length. If the electric potential is taken to be zero at infinity, what is the potential at the midpoint of any one of the sides of the triangle?
A. 16 V B. 10 V C. 70 V D. 46 V E. 44 V
The mat of a trampoline is held by 32 springs, each having a spring constant of 5 000 N/m. A person with a mass of 40.0 kg jumps from a platform 1.93 m high onto the trampoline. Determine the stretch of each of the springs
An atom with fewer electrons than protons is a
a. semiconductor b. superconductor c. positive ion d. negative ion e. none of the above