From the choices below, choose all that are correct.

i. sound traveling faster through the air in the sahara desert than in antarctica.

ii. an astronaut hearing the loud explosion of a ship from a mile away in space.

iii. speeds and frequencies of sounds change as they pass through different mediums.
a) i
b) i and ii
c) i and iii
d) ii and iii

What is the maximum acceleration of the wing tips, in units of g?

Aspecial electronic sensor is embedded in the seat of a car that takes riders around a circular loop-the-loop ride at an amusement park. the sensor measures the magnitude of the normal force that the seat exerts on a rider. the loop-the-loop ride is in the vertical plane and its radius is 23 m. sitting on the seat before the ride starts, a rider is level and stationary, and the electronic sensor reads 740 n. at the top of the loop, the rider is upside down and moving, and the sensor reads 370 n. what is the speed of the rider at the top of the loop?

A10-kg isto a of 10 m at aa0.9 kg/m.30 kg of ,at aas10-m .. ( 9.8 m/s2 g.)