You are driving on the highway at 40 m/s with another car driving next to you at exactly the same speed. When you honk your horn (with a frequency of 315 Hz),
what frequency of sound will the driver of other car perceive?
235 Hz
315 Hz
475 Hz
07.8 Hz

An object is 10 cm from the mirror, its height is 1 cm and the focal length is 5 cm. what is the image height? (indicate the object orientation by including the + or - sign with the answer.) hi = cm +1 -1 +10 -10

What property of an object determines its inertia?

Large electric fields in cell membranes cause ions to move through the cell wall. the field strength in a typical membrane is 1.0 x 10 7 n/c. what is the magnitude of the force on a calcium ion with charge +e? what is its acceleration? is it possible for a particle with the same charge as as calcium to have a different acceleration if placed at this location? what would change the acceleration: mass of the particle? diameter of the particle?