3. The average value of the radius r can be determined using the following formula: S, rP(r)dr. A. Show that the average value of the radiusr for the 1s hydrogen atom is a. B. Why is the value at point (A) greater than the Bohr radius, when 1s is the closest state to the nucleus of Hydrogen?

Please try not to use derivatives or integrals to calculate stuff. Thank you.

7. Determine the acceleration of a car starting from rest, moving 45 m [S] in 1.0 minutes. a. 0.025 m/s? [S] b. 1.5 m/s? [S] c. 9.0 x 10' m/s? [S] d. 1.5 m/s [S] e. 9.0 x 10' m/s [S]

An airplane accelerates from rest, down a runway at 3.4 m/s² for 26.1 s until is finally lifts off the ground. The distance traveled by the airplane before the takeoff is O a. 0 m O b. 2316.11 m O c. 1158.06 m O d. 44.37 m