Three different pith balls (P, Q, and R) are charged by contact. Then the pith balls are brought close to each other. Pith balls P and Q attract each
other. Pith balls P and Rrepel each other. Which of these could be the
charges on the three pith balls?

a) OP:-Q: +R: +
b) P: - O: +R: -
c) P: - Q:-R: +
d) P: - Q:-R: -
e) O
P: +Q:-R: -

Amount of liquid measured in l or lm

Consider the following reaction at equilibrium. 2co2 (g) 2co (g) + o2 (g) h° = -514 kj le châtelier's principle predicts that the equilibrium partial pressure of co (g) can be maximized by carrying out the reaction a. at high temperature and high pressure b. at high temperature and low pressure c. at low temperature and low pressure d. at low temperature and high pressure e. in the presence of solid carbon

Amap that uses a range of colors and shading to represent the elevation, depth, or landscape of specific features on earth is a/an map.