Consider the motion of a projectile. It is fired at t = 0. Its initial speed is 27 m/s and its initial projection angle is 45◦ from the horizontal. What is the maximum height of its trajectory? The acceleration due to gravity is 9.8 m/s^2. Answer in units of m.

Waves are used in many practical applications to support work, entertainment, and health. one example is the use of ultrasound imaging to safely track the development of a growing fetus. what is a specific example of a practical application of waves in medicine, entertainment, safety, or other fields? provide a brief explanation of how the properties of waves are useful to that application.

The coefficient of friction is a number that represents the resistance to sliding between two in contact with one another.

Along the line connecting the two charges, at what distance from the charge q1 is the total electric field from the two charges zero? express your answer in terms of some or all of the variables s, q1, q2 and k =14ï€ïµ0. if your answer is difficult to enter, consider simplifying it, as it can be made relatively simple with some work.