Answer:
exposing it to a flame to see if it catches on fire
Explanation:
A chemical property is when the matter changes into a different substance. This is true when you expose it to a flame because if a substance is burned, it will change into a new substance. All the other options are examples of physical changes.
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<span>First the stone will move upward till reach maximum height, when it will start to go down till hit the ground. So to calculate the time going up, we can use equation:
Vf = Vi + a*t , where Vf is final speed, Vi is initial speed, a is acceleration and t is time
In this case a = -g = -9.81 m/s^2 because the stone goes against gravity attraction.
0 = 6.71 - 9.81*t => t = 6.71/9.81 = 0.68 seconds
And the distance upward will be:
d = Vi*t + 1/2*a*t^2 = 6.71*0.68 + 1/2*(-9.81)*0.68^2
d = 4.59-2.29 = 2.29 metres
Then the stone starts to go down till the ground, which is 18.9 + 2.29 metres below
and it takes, now a = g = 9.81 m/s2 because stone goes in the same direction than gravity atraction:
d = Vi*t + 1/2*a*t^2 => 0*t+1/2*9.81*t^2 => 21.19 = 4.905*t^2 => t = 2.08 seconds
So then the stone is on air 0.68 seconds going up and 2.08 going down, that is in total: 2.76 seconds</span>
Answer:
incurriculum design process the answer is designs
Answer:
Explanation:
The position between point charge <em>q</em> to x = -8.0 m and y = 1.5 m is:
meter
Then the magnitude of the electric field E is:
For the vector of E:
in N/C
Answer:
The friction of the string and its pivotal anchor point cannot be eliminated. The precise measurement of the length of the pendulum is difficult to take by using meter sticks or rulers. The value of the acceleration due to gravity g in the locality is not constant and must be obtained from reliable sources.