Arace car, traveling at constant speed, makes one lap around a circular track of radius r in a time t. the circumference of a circle is given by c = 2(π)r. which one of the following statements concerning this car is true? the average speed of the car over any time interval is equal to the magnitude of the average velocity over the same time interval. the average velocity of the car is the same over any time interval. the average speed of the car is the same over any time interval the displacement of the car does not change with time. the instantaneous velocity of the car is constant.

Agas expands from an initial volume of 0.040 m^3 and an initial pressure of 210 kpa to a final volume of 0.065 m^3 while its temperature is kept constant. how much work is done by the system?

Calculate the ratio of h+ ions to oh– ions at a ph = 6. find the concentration of h+ ions to oh– ions listed in table b of your student guide. then divide the h+ concentration by the oh– concentration. record this calculated ratio in table a of your student guide. compare your approximated and calculated ratios of h+ ions to oh– ions at a ph = 6. are they the same? why or why not? record your explanation in table a. what is the concentration of h+ ions at a ph = 6? mol/l what is the concentration of oh– ions at a ph = 6? mol/l what is the ratio of h+ ions to oh– ions at a ph = 6? : 1

Which best term to describe a chemical reaction that absorbs energy from its surroundings? a.thermal conductor b.thermal insulator c.endothermic d.exothermic