Câu 1: Chuyển động cơ học là gì? Lấy 2 ví dụ về chuyển động cơ học và chỉ rõ vật được chọn làm vật mốc

real, smaller and upside-down.   so the answer should be b.

this is poiselle's equation from fluid mechanic in physics. mech eng

  distance on the y-axis and time on the x-axis.

explanation:

the instantaneous velocity = change in position/time taken

the slope of the graph should give instantaneous velocity.

  slope of a graph = change in value of y -axis / change in values of x -axis

  comparing both the equations

    change in value of y -axis = change in position

  change in values of x -axis = time taken

so position values should be on the y axis and time values should be on the x axis.

distance on the y-axis and time on the x-axis.

find the surface area of the sphere to the nearest square unit. use a calculator.

a. 254 in.2

b. 64 in.2

c. 127 in.2

d. 1,018 in.2