1.)which is the correctly balanced equation? a. cl2 + nai à nacl + i2 b. 2cl2 + nai à 2nacl + i2 c. cl2 + 2nai à 2nacl + i2 d. cl2 + 2nai à nacl + 2i2 2. the following is an example of which type of reaction? ch3oh + o2 → co2 + 2h2o + heat a. combustion b. endothermic c. substitution d. spontaneous 3.which of the following equations is balanced? a. h2+ o2→h2o b. 2h2 + o2→2h2o c. 4h2 + o2→h2o + o d. h2 + o2→h2o + o2

Athin nonconducting rod with a uniform distribution of positive charge q is bent into a circle of radius r. the central perpendicular axis through the ring is a z-axis, with the origin at the center of the ring. a) what is the magnitude of the electric field due to the rod at z = 0? n/c (b) what is the magnitude of the electric field due to the rod at z = infinity? n/c (c) in terms of r, at what positive value of z is that magnitude maximum? r (d) if r = 4.00 cm and q = 9.00 µc, what is the maximum magnitude? n/c

It may seem strange that the selected velocity does not depend on either the mass or the charge of the particle. (for example, would the velocity of a neutral particle be selected by passage through this device? ) the explanation of this is that the mass and the charge control the resolution of the device--particles with the wrong velocity will be accelerated away from the straight line and will not pass through the exit slit. if the acceleration depends strongly on the velocity, then particles with just slightly wrong velocities will feel a substantial transverse acceleration and will not exit the selector. because the acc

An impulse is the product of the on an object and time during which it is applied