A projectile is fired with an initial speed of $$100 m/s and angle of elevation $$30 degrees. The projectile eventually hits the ground. How far from the initial position (which can be assumed to be the origin) does it travel? Find the speed at impact (with the ground). Note that the projectile is sibject to the downward acceleration due to gravity of $$9.8meters per sq. sec.

Which lists the main components of darwin’s theory of evolution? a. random mutations drive evolution; the evolution of a population happens slowly; organisms have common ancestors; organisms do not change. b. natural selection drives evolution; the evolution of a population happens slowly; organisms have common ancestors; organisms change over time. c. natural selection drives evolution; the evolution of a population happens rapidly; organisms have common ancestors; organisms change over time. d. random mutations drive evolution; the evolution of a population happens rapidly; organisms have common ancestors; organisms do not change.

The a992 steel rod bc has a diameter of 50 mm and is used as a strut to support the beam. determine the maximum intensity w of the uniform distributed load that can be applied to the beam without risk of causing the strut to buckle. take f.s. = 2 against bucklin

How is sound energy produced a. vibrating objects b. objects being heated c. temperature differences d. stationary objects