Omar observes that many buildings in his city were built using limestone. he has read that acid rain can damage limestone. he also knows that limestone reacts with acids and that chemical reactions are affected by temperature. with this in mind, he conducts an investigation to see how the amount of damage to the limestone is affected by the amount of acid on the stone. which statement describes the correct plan for his procedure?

Which is the best for showing percentages of different types of cars sold(gas hybrid , electric , other ) in the united states ?

In a series circuit the __ is the same at every point

Astudent throws a water balloon with speed v0 from a height h = 1.76 m at an angle θ = 21° above the horizontal toward a target on the ground. the target is located a horizontal distance d = 9.5 m from the student’s feet. assume that the balloon moves without air resistance. use a cartesian coordinate system with the origin at the balloon's initial position. (a) what is the position vector, rtarge t, that originates from the balloon's original position and terminates at the target? put this in terms of h and d, and represent it as a vector using i and j. (b) in terms of the variables in the problem, determine the time, t, after the launch it takes the balloon to reach the target. your answer should not include h. (c) create an expression for the balloon's vertical position as a function of time, y(t), in terms of t, vo, g, and θ. (d) determine the magnitude of the balloon's initial velocity, v0, in meters per second, by eliminating t from the previous two expressions.