Answer:
Plane's initial speed: 14
Plane's acceleration: -1
Explanation:
average velocity =
V0=?
Vf= 0 m/s (rest)
t=7 s
Isolating V0
V0=2a-Vf = 2*(7) - 0= 14
Otherwise;
Answer:
True
Explanation:
Electronegativity difference of less than 0.4 characterized covalent bonds. For two atoms with an electronegativity difference of between 0.4 and 2.0, a polar covalent bond is formed-one that is neither ionic nor totally covalent.
Assume the ball was thrown at ground level, so its initial position vector is . Let denote the ball's initial speed and the angle at which the ball is thrown.
Over time, its position changes according to , where the components are determined by
where is the acceleration due to gravity. We know the ball is in the air for 4.5 seconds and that it travels a horizontal distance of 45 meters, which means
Divide the second equation by the first to eliminate , and we can solve for , expecting some solution within :
Then plugging this into either equation above will tell us the ball's initial speed:
A) experimental because he isn’t sure and is testing out