Which of the following is a displacement? a. 5 m/s c. -0.7 m/s2 b. 10 ft d. 3 blocks east

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

d. platinum would have the greatest temperature increase because it has the lowest specific heat.