Which of these statements is true?
a. The value of g is 1.
b. The value of g is exactly constant at any given distance from Earth's center.
c. Even at a given distance from Earth's surface, the value of g can vary slightly.
d. The value of g changes a great deal from place to place at a given elevation on Earth's surface.
e. The value of g is exactly constant all over Earth's surface.
c
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Four identical point charges (+6.0 nC) are placed at the corners of a rectangle which measures 6.0 m × 8.0 m. If the electric potential is taken to be zero at infinity, what is the potential at the geometric center of this rectangle?
A. 58 V B. 63 V C. 43 V D. 84 V E. 11 V
A car starts out when the air temperature is 288 K. The air pressure in the tires is 500 kPa. After driving a while, the temperature of the air in the tires increases to 298 K
What is the pressure in the tires at that point, assuming the volume remains constant? A) 129 kPa B) 483 kPa C) 507 kPa D) 517 kPa E) 532 kPa
Two blocks with masses 2.0 kg and 3.0 kg are placed on a horizontal frictionless surface. A light spring is placed in a horizontal position between the blocks. The blocks are pushed together, compressing the spring, and then released from rest. After contact with the spring ends, the 3.0-kg mass has a speed of 2.0 m/s. How much potential energy was stored in the spring when the blocks were
released? a. 15 J b. 3.0 J c. 6.0 J d. 12 J e. 9.0 J