Abaseball is hit when it is 2.7 feet above the ground. it leaves the bat with n initial speed of 150 ft/sec making an angle of [{mathjax fullwidth='false' 18^{\circ} }] with the horizontal. assume a drag coefficient k=6.12. find the range and the flight time of the ball for projection with linear drag\\ [{mathjax fullwidth='false' x=x_0+ \frac{v_0}{k}(1- e^{-kt}) cos \alpha \\ y= y_0+ \frac{v_0}{k}(1- e^{-kt}) sin \alpha +\frac{8}{k}(1-kt-e^{-kt}) }] where k is the drag coefficient and v_0 and \alpha are the projectiles initial speed and the lauch angle, and g is the acceleration of the gravity (32ft/sec^2) a. flight time=2.93 sec; range=351.6 feet b. flight time=2.81 sec; range=340.3 feet c. flight time=3.16 sec; range=362.5 feet d. flight time=2.01 sec; range=331.6 feet

Under conditions for which the same room temperature is maintained by a heating or cooling system, it is not uncommon for a person to feel chilled in the winter but comfortable in the summer. provide a plausible explanation for this situation (with supporting calculations) by considering a room whose air temperature is maintained at 20â°c throughout the year, while the walls of the room are nominally at 27â°c and 14â°c in the summer and winter, respectively. the exposed surface of a person in the room may be assumed to be at a temperature of 32â°c throughout the year and to have an emissivity of 0.90. the coefficient associated with heat transfer by natural convection between the person and the room air is approximately 2 w/m2 â‹…â‹… k. what is the ratio of the thermal resistance due to convection to the thermal resistance due to radiation in the summer? what is the ratio of thermal resistances in the winter

This punnett square shows the cross between two pants. one parent has round seeds (rr). and the other parent has wrinkled seeds (rr) which best describes their offspring as shown in this cross?

Lacie kicks a football from ground level at a velocity of 13.9 m/s and at an angle of 25.0° to the ground. how long will the ball be in the air before it lands? how far will the football travel before it lands?