11. Maria left her house bicycling at 10 km/h. Her acceleration was 30 km/h2 . How fast was she bicycling when she arrived at school 30 minutes later?

A30 kg weight lies on top of a massless piston of area a = 0.01 m2 the exterior air is at a (constant) p =1 atm and t = 27 c. the interior gas is 0.4 moles of (ideal) n2 and it has initial temperature 27.00 degrees c. 1. what is the initial pressure in the interior? a. 29.4 kpa b. 130.7 kpa c. 101.3 kpa the next three questions concern what happens when an amount of heat q is slowly added to the interior, raising the piston by 1 mm and raising the interior temperature to 27.40 c

How is sound energy produced a. vibrating objects b. objects being heated c. temperature differences d. stationary objects

What was the first instrument to ever record an earthquake?