If position vector r = bt^2i + ct^3j, where b and c are positive constants, when does the velocity vector make an angle of 450 with the x-and y-axes?

Yardım edin lütfen uzun cevap lazım çok puan veriyorum

Alice added sodium chloride to water and stirred the water for several minutes. alice is most likely trying to demonstrate that ionic compounds a. are hard. b. can dissolve. c. are clear. d. can melt.

Discuss how the hardness or softness of the landing surface is related to the time required to stop the egg