Ahot air balloon rising vertically is tracked by an observer located 7 km7 km from the lift‑off point. at a certain moment, the angle between the observer's line of sight and the horizontal is ,π5, and it is changing at a rate of 0.2 rad/min.0.2 rad/min. how fast is the balloon rising at this moment? let yy be the height of the balloon (in km), be time (in minutes), and thetaθ the angle between the line‑of‑sight and the horizontal (in radians). (use decimal notation. give your answer to two decimal places.)

Achlorine atom has 17 protons and 18 neutrons. what is its mass number? what is its atomic number?

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

Click the game tab at the bottom of the simulation and select level 1. (there is no seesaw balance for this part of the activity.) balance the first equation, and click check to see if you got it right. if you can’t balance it in the first try, you can try again. work through the five equations for level 1. click continue to go on to level 2, and later level 3. each level is more difficult than the one before. keep trying until all the equations are balanced. in one or two sentences, describe how you did in the balancing game. in a few more sentences, explain one strategy you learned for balancing more complex equations.