Four point charges are located at the corners of a square, 1.00 m by 1.00 m. On each of two diagonally opposite corners are 1.00 ?C charges. On each of the other two corners are -1.00 ?C charges. What is the direction of the force on each charge?

A. positive charges away from away from the center of the square, negative inward toward center
B. negative charges away from away from the center of the square, positive inward toward center
C. positive and negative charges both toward the center of the square
D. positive and negative charges both away from the center of the square
E. no direction (net force = 0)


C. positive and negative charges both toward the center of the square

Physics & Space Science

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In a(n) _____________reaction, one solid ? phase transforms to two solids ? and ?.

Fill in the blank(s) with the appropriate word(s).

Physics & Space Science

A baseball catcher puts on an exhibition by catching a 0.200-kg ball dropped from a helicopter at a height of 150 m above the catcher. If the catcher "gives" with the ball for a distance of 0.755 m while catching it, what average force is exerted on the mitt by the ball? (g = 9.80 m/s2)

a. 39.7 N b. 294 N c. 389 N d. 399 N e. 1110 N

Physics & Space Science

Which of the following is true of the scientific names of constellations?

A) They are in Latin or Greek. B) They are in French or Italian. C) They are in Hebrew or Arabic. D) They are in Sumerian or Mayan.

Physics & Space Science

Molecular Speeds: The molecular weight of nitrogen, N2, is 28 g/mol. What is the rms speed of nitrogen molecules in a cooler at 8.0°C? The Boltzmann constant is 1.38 × 10-23 J/K and NA = 6.022 × 1023 molecules/mol.

A. 450 m/s B. 500 m/s C. 550 m/s D. 600 m/s E. 650 m/s

Physics & Space Science