Which statement is true about acceleration?
1 answer:
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The glassware with the highest degree of accuracy is 250 mL beaker.
<h3>What is accuracy?</h3>When in an experiment, a value is measured 5 times, then if the values measured are same for most of the time or like three times out of five, it said to be accurate. The phenomenon is accuracy.
Accuracy compares the experimental value to the theoretical value.
Accepted density of water = 0.99 g/mL
1. 10 mL cylinder
Mass of water = 6.76 g
Volume of water = 6.8 mL
Density = mass /Volume
density = 6.76/6.8 = 0.99412 g/mL
Percentage error = [Observed value - Accepted value/ Accepted value ] x 100
% error = [0.99412 - 0.99 / 0.99 ] x 100
% error = 0.416 %
2. 50 mL cylinder
Mass of water = 24 g
Volume of water = 24.2 mL
density = 24/24.2 = 0.9917 g/mL
Percentage error = [Observed value - Accepted value/ Accepted value ] x 100
% error = [0.9917 - 0.99 / 0.99 ] x 100
% error = 0.172 %
3. 25 mL cylinder
Mass of water = 17 g
Volume of water = 17.1 mL
density = 17/17.1 = 0.99415 g/mL
Percentage error = [Observed value - Accepted value/ Accepted value ] x 100
% error = [0.99415 - 0.99 / 0.99 ] x 100
% error = 0.419 %
4. 250 mL beaker
Mass of water = 35 g
Volume of water = 35.3 mL
density = 35/35.3 = 0.9915 g/mL
Percentage error = [Observed value - Accepted value/ Accepted value ] x 100
% error = [0.9915 - 0.99 / 0.99 ] x 100
% error = 0.152 %
Lesser the percentage error, higher is the accuracy.
Thus, 250 mL beaker has the highest degree of accuracy.
Learn more about accuracy.
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Answer:
<em>The centripetal acceleration will be increased to 1.33 of its initial state. </em>
Explanation:
<h3>Centripetal acceleration</h3>The Centripetal acceleration of an object is the acceleration of the object along a circular path moving towards the center of the circular path. The centripetal acceleration is represented in the equation bellow
...................................... 1
where is the centripetal acceleration
v is the tangential velocity
and r is the radius.
<h3>How the Change of Radius Affects the Centripetal Acceleration</h3> Reference to equation 1 the centripetal acceleration ( ) is inversely proportional (
) to the radius of the circle or path. this means that when the radius increases the centripetal acceleration reduces and when the radius reduces the centripetal acceleration increases. The radius was reduced to 0.75R in the question that will amount to 1.33
increase in the centripetal acceleration. This can be obtained by multiplying the centripetal acceleration by the inverse of 0.75 which is 1.33.
Therefore, when the radius is reduced by 0.75R , the centripetal acceleration of the steel ball will increase by 1.33. since the period is kept constant