Arace car driver must average 200km/hr for four laps to qualify for a race. because of engine trouble, the car averages only 170km/hr over the first two laps. what is the average speed must be maintained for the last two laps

Which of the following is not a transverse wave? a) soundb) lightc) radiod) all of thesee) none of these

What component of earth’s atmosphere exists entirely as a result of photosynthesis?

The space between two 15-in.-long concentric cylinders is filled with glycerin (viscosity = 8.5 × 10-3 lb·s/ft2). the inner cylinder has a radius of 1 in. and the gap width between cylinders is 0.1 in. determine (a) the torque and (b) the power required to rotate the inner cylinder at 180 rev/min. the outer cylinder is fixed. assume the velocity distribution in the gap to be linear.