Answer - 1 liter of water (l) = 1,000.00 gramshope this helps :)
Velocity = (distance covered in a direction) / (time to cover the distance)
Since the y-axis is position (distance), the speed at 3 seconds is the slope of the graph at 3 seconds, and NOT its y-value.
The slope is fairly easy to pick off, because the graph is so straight from 2 sec to 5 sec. During that time, the distance shrinks by 10 meters (from 10m to zero). So the slope of that whole piece of the graph is (-10m) / (3 sec).
That's a slope of (10/3 m/s) or 3.33 m/s .
In answer to the question, we can only give the speed at 3 sec, not the velocity, since we have no information about the direction of the motion. Consequently, I would call the speed a positive number. But it's not worth arguing about, so you should just select <em>choice-A </em>and not make a big scene.
A) A service winner; the opponent cannot return the serve
B) A tennis stroke made across the body with the back of the hand facing the direction of the stroke
C) Exercising to increase stamina; mostly associated with aerobic activities and cardiovascular health
D) When the ball does not land in the service box
E) Is the absolute range of movement in a joint or series of joints and muscles
F) A stroke done to the right-front of the body (for right-handers), with the racket in a normal position (palm of hand facing opponent)
G) When the service hits the net and lands in a let is played and the server gets another ball
H) A sequence of shots within a point
I) Position facing the net. Used to begin most tennis strokes
J) The way the game begins. Governed by a specific set of rules
K) A tennis stroke that creates a backspin on the ball
L) To exert force on an object using muscles
M) A tennis stroke made across the body with the back of the hand facing the direction of the stroke
The answer is B. Weak electrolytes are weak because they only partially dissociate into ions in water.
Hope this helps!
Air molecules are pushed together in a compression and air molecules are spread out in rarefraction.