Can i get some on these two questions
a hiker walks 50 miles 55 degrees south of west. how far did she walk west?
select one:
a. 28.7 miles
b. 40.9 miles
c. 35.4 miles
d. none of the above
a ball has a velocity of 25 m/s at 37 degrees. what is the horizontal component of the velocity?
select one:
a. 15 m/s
b. 18 m/s
c. 20 m/s
d. 25 m/s

Aparticle of mass m is placed in a one-dimensional box of length l. the box is so small that the particle’s motion is relativistic, so that e p2/2m is not valid. (a) derive an expression for the energy levels of the particle using the relativistic energy–momentum relation and the quantization of momentum that derives from connement. (b) if the particle is an electron in a box of length l 1.00 1012 m, nd its lowest possible kinetic energy. by what percent is the nonrelativistic formula for the energy in error?