A car enters the freeway with a speed of 6.4 m/s and accelerates uniformly for 3000 m in 210 seconds. How fast is the car moving
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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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The pressure inside the container will be <u>9.39×10⁴Pa</u>
At constant volume, the pressure in a container is directly proportional to its absolute temperature.
If air in a container is sealed at 20⁰C at a pressure equal to the atmospheric pressure and cooled to 2.00⁰C, the pressure inside the container falls.
Convert the temperature in Celsius to Kelvin.
Use the expression for the pressure law.
Substitute 100,000 Pa for P₁, 293.16 K for T₁ and 275.15K for T₂.
The pressure in the container (correct to 2 sf) is <u>9.39×10⁴Pa</u>