8. A woman who doesn't appreciate the improper advances of a rude thug blasts him with some pepper spray. She then screams. The frequency of
her scream is a piercing 1,000 Hz on an evening when the air temperature
is a brisk 10°C. If the thug starts sprinting away from the woman at a
speed of 7 m/s what frequency will he hear?

From negative to negative

Shania is trying to determine the oldest geologic unit on this map and the reason to why is she unable to do so is that  the units are all the same age.. when there is the same age, there will be no oldest geologic unit and that i cannot be credible.

I'm having some difficulty seeing the diagram clearly.but the question says there's a net inward force on the object.so we know right away,  from newton's 2nd law of motion, thatthat baby is accelerating.  it doesn't even matter which way thenet force is pointing.  if there's any net force, then either theobject's speed or else its direction must be changing.

In atoms, the electron carries a negative elementary or unit charge; the proton carries a positive charge. the two types of charge are equal and opposite. in an atom of matter, an electrical charge occurs whenever the number of protons in the nucleus differs from the number of electrons surrounding that nucleus.