Answer:
2 m/ s2.
Explanation:
2 m/ s2.
Acceleration = (final speed - initial speed) divided by total time taken.
= (25–15) divided by 5
10 divided by 5 gives an acceleration of 2 metres per second per second.
Explanation:
2) C would need the least effort, because the longer the effort distance, the least the effort applied.
Answer:
When you view the candle with a lens, located at a distance D of the candle, you will see an inverted image of the candle, and this image of the candle may be a little distorted. At this point you need to change the distance between the observer (you) and the lens.
When the image of the candle is nitid (this means that the image is focalized)
You need to measure the distance between the lens and the observer. suppose that this distance is d.
(this process is usually written as: If the actual height of the candle is H, you need to record the distance where the image of the candle also has a height H)
Now, the focal point of the lens will be obtained with the lens maker equation:
1/D + 1/d = 1/f
where f is the focal point of the lens.
B.high density, low humidity
C.low density, low humidity
D.low density, high humidity
Answer:
A (high density and high humidity)
Explanation: Hope this helps :)
Answer:
1.87 s
Explanation:
Initial speed of throw = 9.20 m/s
Net vertical displacement = 0
The bowling pin would be in free fall i.e. a = 9.8 m/s²
Use the second equation of motion:
s = ut + 0.5at²
0 = (9.20)t-0.5(9.8)(t²)
9.20 = 4.9 t
⇒t = 1.87 s
Thus, the total time of flight, the time elapses before the bowling pin falls in juggler's hand is 1.87 s.
A juggler throws a bowling pin straight up with an initial speed, the time that elapses before the pin reaches the juggler's hands is 1.88 s.
Given:
Initial speed, u = 9.2 m/s
The time can be calculated from the second equation of motion. The second equation of motion provides a relation between height, initial speed, acceleration, and time respectively.
From the second equation of motion:
h = ut + at²
When the ball reaches the hands, the distance becomes zero. Therefore, the time is:
0 = 9.2t -0.5 × 9.8t²
9.8t = 18.4
t = 18.4÷ 9.8
t = 1.88 s
Hence, the time that elapses before the pin reaches the juggler's hands is 1.88 s.
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