40 30-
20
10
0
0
10
20
30
50
60
70
응
80
Time (s)
(0)
Write down the times at which the car's velocity was 20 m/s.
once
[1]

Which of the following represents an upside-down image? o a. +doo b. -doo c. +mo d.-m

What is work? how much work is done to move an object 0 meters?

During takeoff, the sound intensity level of a jet engine is 170db at a distance of 34 m. what's the sound intensity level at a distance of 1.0 km?