11. Pressure and Force Two boxes are each suspended by thin strings in midair. One is 20 cm x 20 cm x 20 cm.
The other is 20 cm x 20 cm x 40 cm.
a. How does the pressure of the air on the outside of
the two boxes compare?
b. How does the magnitude of the total force of the air
on the two boxes compare?​

The roller coaster from problem #1 then tops a second hill at 15.0 m/s, how high is the second hill? 91.5 m 79.2 m 80.0 m 68.5 m

A2.00-m long piano wire with a mass per unit length of 12.0 g/m is under a tension of 8.00 kn. what is the frequency of the fundamental mode of vibration of this wire?

Imagine that you have two balloons (or, better yet, actually inflate two balloons, if possible). create static electricity around one of the balloons by rubbing it against your hair or your sweater and then bring that balloon close to the other balloon, which has not been charged. try this with at least one other object—and for variety in the discussion, avoid using an object already described by your classmates. then, for your initial post to the discussion, answer the following questions: what happened with the two balloons?