A ski supply company is testing the friction of a new ski wax by placing a waxed block on an inclined plane covered with wet snow. The inclined plane is slowly raised until the block
begins to slide. At the instant the block starts to slide, the component of the weight of the
block parallel to the incline, mgsino, and the resistive force of friction, pimg cose, are
equal, where he is the coefficient of friction. Find the value of u to the nearest hundredth if
sino = 0.138 at the instant the block begins to slide.
The value of u is

At wind speeds above 1000 centimeters per second (cm/sec), significant sand-moving events begin to occur. wind speeds below 1000 cm/sec deposit sand and wind speeds above 1000 cm/sec move sand to new locations. the cyclic nature of wind and moving sand determines the shape and location of large dunes. at a test site, the prevailing direction of the wind did not change noticeably. however, the velocity did change. fifty-nine wind speed readings gave an average velocity of x = 1075 cm/sec. based on long-term experience, σ can be assumed to be 245 cm/sec. (a) find a 95% confidence interval for the population mean wind speed at this site. (round your answers to the nearest whole number.) lower limit cm/sec upper limit cm/sec