A 80 kg person walks from the ground to the roof of a 75 m tall building. How much gravitational potential energy (in Joules) does she have at the top of the building?

Review multiple-concept example 7 in this chapter as an aid in solving this problem. in a fast-pitch softball game the pitcher is impressive to watch, as she delivers a pitch by rapidly whirling her arm around so that the ball in her hand moves in a circle. in one instance, the radius of the circle is 0.626 m. at one point on this circle, the ball has an angular acceleration of 66.1 rad/s2 and an angular speed of 12.6 rad/s. (a) find the magnitude of the total acceleration (centripetal plus tangential) of the ball. (b) determine the angle of the total acceleration relative to the radial direction.

According to the image below, which season is about to begin in the southern hemisphere? a. summer b. autumn c. winter d. spring

What happens when the vapor pressure of a liquid is equal to the external pressure?