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A car travels down a straight and level road at a constant speed of 25 m/s for 12 s. What is the acceleration of the car?       

(a).   A car with a speed of 35 m/s goes around a level, circular track with radius of 950 m. What is the centripetal acceleration of the car in m/s2 and in g’s?                                                                                         (2.5 points) (b).         A small stone is tied to the end of a 1.8 m long string and whirled in a horizontal circle. The stone experiences a centripetal acceleration of 12 m/s².              What is the speed of the stone?                                              (1.5 points)

         Alvarez, a handyman, accidentally drops his 500 g work tool from a 12 m high building (take g = 9.80 m/s2) (i).          How long does it take for the tool to hit the ground?                                                                       (1.5 points)          (ii).         What is the acceleration of the tool just before it hits the ground?                                                     (1.0 point) (iii).       At what speed does the tool hit the ground?                                                                                       (1.5 points) (iv).        What is the mass of the tool just before it hits the ground?                                                               (1.0 point)

                                                                          Extra Credit (a).   What is the force (in N) between two 1200 kg cars separated by a distance of 35.0 m on an interstate highway         (G = 6.67 x10-11 Nm2/kg2 )?                                                                                                               (1.5 points)  (b).      A 36.0 kg block is placed on a vertically mounted spring, the spring is compressed 25 cm.  (i).     What is the spring constant?                                                                                                                   (1.5 points) (ii).    How much energy is stored in the compressed spring?                                                                        (1.5 points)                                

Molality is defined as the __________.

A solution is prepared by dissolving 7.00 g of glycerin (C3H8O3) in 201 g of ethanol The freezing point of the solution is __________°C. The freezing point of pure ethanol is at 1 atm. The molal-freezing-point-depression constant (Kf) for ethanol is The molar masses of glycerin and of ethanol are 92.1 g/mol and 46.1 g/mol, respectively.

What is the primary reason for the low solubility of KCl in the nonpolar compound benzene (C6H6)?

If the rate law for the reaction2A + 3B → productsis second order in A and first order in B, then the rate law is

The phrase “like dissolves like” refers to the fact that __________.