Particles of mass m and energy e= v/2 potential barrier at are incident upon a x-0. (v(x)= 0 for x< 0, v(x)= v for x> 0) if the particles' state is described ( ikx-iwt) be (hint: j (ab- (20) 2mi ap(ikjz - iwt) by 1) what is k? (4) what's the transmission and reflection at the interface? (8) 2) what is the particle density at x(> 0)? (remember, dn= 1b| d)

Aboat radioed a distress call to a coast guard station. at the time of the call, a vector a from the station to the boat had a magnitude of 45.0 km and was directed 15.0° east of north. a vector from the station to the point where the boat was later found is = 30.0 km, 15.0° north of east. what are the components of the vector from the point where the distress call was made to point where the boat was found? in other words, what are the components of vector c = b - a?

Air conditioners not only cool air, but dry it as well. suppose that a room in a home measures 5.0m×9.0m×2.4m . if the outdoor temperature is 30 ∘c and the vapor pressure of water in the air is 85 % of the vapor pressure of water at this temperature, what mass of water must be removed from the air each time the volume of air in the room is cycled through the air conditioner? the vapor pressure for water at 30 ∘c is 31.8 torr.

Aball is thrown horizontally from a cliff at 8m/s .in what direction is the ball moving 2s later?