A. The Sun is the only star in the solar system (that we know of)
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The statement that is true regarding a distance vs. time graph is option A: The graph should show distance on the vertical axis.
<h3>Where is the plot of distance?</h3>
How far an object has come in a certain amount of time is displayed on a distance-time graph. Time is represented on the X-axis and Distance is plotted on the Y-axis (left) (bottom).
On a distance-time graph, an object's motion is indicated by a sloping line. The slope or gradient of the line in a distance-time graph is equal to the object's speed. The object is travelling more quickly the steeper the line is (and the bigger the gradient).
Note that the distance-time graph shows the relationship between distance and time by plotting distance on the y-axis and time on the x-axis.
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Answer:
A. Closed Series Circuit
Explanation:
Let's dissect the image. Just a heads up, I'm going to use a few of street/road analogies here. Think of the current as cars/people, the circuit path as streets/roads, and the resistors(in the bulbs) are like speed bumps.
- We have arrows dictating the direction of the current caused by the battery. If the circuit were open, it'd be as though we had a gap in a road so that no cars/people could go through. But <u>because we have a current, that indicates that the circuit is closed</u>.
- Next there's the question of the whether the resistors are in series or parallel. In simple cases like this, ask yourself if the resistors are on the same "street" or not. By that I mean, can you follow one line of current without breaking off to a different path? Here, it looks like the two resistors/bulbs are in series because they are on the same path.
So what you're looking at is a closed series circuit.
Let m1 and m2 be the two masses, whereby m1 is the one that stops upon collision (assuming an elastic collision). We use the conservation of the momentum for this situation, namely the total momentum of the two moving masses is conserved and equal the momentum of the mass2 after the collision:
From this we can determine the resulting velocity:
Which answers the question for general values of m1, m2, v1, and v2.
For instance, if m1=m2, and v1=v2=1 m/s then the resulting velocity of the mass2 would be sqrt(2) m/s in the direction of 45 degrees from its original path.
Answer:
minimum muzzle velocity of the dart:
Explanation:
Al t time t=0, the monkey drops and the dart is shot,
For the monkey the general position equation will be:
it starts from rest so , and the acceleration is , so
(1)
it will hit the ground when y = 0:
For the dart first we need to know the time when it reaches the monkey on the horizontal position, for this we have the equation:
In this case, neglecting the air friction acceleration will be 0, and considering the origin on the gun :
(2)
So the time when it hits the monkey would be when x = 70m:
(3)
To hit the monkey before it reaches the ground it must be