1. A skier has a mass of 80kg. He starts from rest and skis down a slope which drops 50m in height.
a) Calculate the amount of gravitational potential energy the
skier loses skiing down the slope.
b) What kinetic energy does he have at the bottom of the slope?
c) How fast is the traveling skier at the bottom?

see the picture for the vector

the magnitude of the vector by pythagorean theorem

r = √( (-10)^2 + (3)^2 ) = √109

magnitude = √109 units

the direction angle between vector and x-axis is

tan^(-1)(3/10) = 16.699

so the direction is approximately 16.7 degrees north of west

multiple allele inheritance is traits controlled by more than 2 alleles (ex: pigeons having 3 alleles of one gene govern their feather color).

305.7

explanation:

density =m/v

density =917/3.00

density = 305.

approximately = 305.7

in four significant figures