PHYSICS LAB PRACTICAL | QUESTIONS WITH
VERIFIED ACCURATE ANSWERS | 2026
Lab 1: Measurement
How do you find percent error? - Answers - |True value- Measured value/true value| *
100
**there is a percent error program
Lab 1: Measurement
How do you find the area of an object? - Answers - pi * radius of the circle squared
**there is a circle area program
Lab 1: Measurement
How do you find the volume of an object? - Answers - (4/3)*pi*R^3
**there is a sphere volume program
Lab 1: Measurement
What was the purpose of this experiment? - Answers - The purpose of this experiment
is to become familiar with methods of measurement and error.
Lab 1: Measurement
What is the standard unit for length, mass, and time in the MKS metric system? -
Answers - Meter, Kilogram, Second
Lab 1: Measurement
Why are units important when reporting the result of a measurement? - Answers - Units
are important because they allow for a comparison to a standard which helps to
understand the results.
Lab 1: Measurement
An object is estimated to be 2.5 cm long. When measured with a Vernier caliper its true
length is determined to be 2.47 cm. What is the percent error of the estimated value? -
Answers - 1.21 %
, Lab 1: Measurement
Complete the following calculations using the explanation of significant figures given
below. When multiplying and dividing several quantities, the number of significant
figures in the final answer is the same as the number of significant figures in the
quantity with the least amount of significant figures that is being multiplied. When adding
and subtracting several quantities, the number of decimal places in the result should
equal the smallest number of decimal places of any term in the sum.
Given: x= 12.24 y= 5400 z=11.572
Determine:
x*y*z=
x+z= - Answers - x*y*z= 7.6 x 10^5
x+z= 23.81
Lab 1: Measurement
Consider the results of your reflex time measurement. What precision, in fractions of
seconds, can you claim for the stopwatch? - Answers - A stopwatch has precision to the
hundreds place whereas the reflex testing is precise to the tenths place so there is a
limit to its precision.
Convert the following measurement:
4.54 cm to mm - Answers - 45.4 mm
Convert the following measurement:
4.54 kg to grams - Answers - 4540 grams
A motion detector works by sending out an inaudible (i.e., ultrasonic) sound beam and
timing the time it takes to travel from a motion detector to an object and back. The
representation of this is a plot of distance versus time. Knowing this, which plot is of a
stationary object?Explain your answer. - Answers - This is stationary because there is
no acceleration.
A motion detector works by sending out an inaudible (i.e., ultrasonic) sound beam and
timing the time it takes to travel from a motion detector to an object and back. The
representation of this is a plot of distance versus time. Knowing this, which plot is of an
object moving away from the motion detector. Explain your answer. - Answers -
Distance increases with increased time as you walk away from the motion detector
Lab 2: Motion
VERIFIED ACCURATE ANSWERS | 2026
Lab 1: Measurement
How do you find percent error? - Answers - |True value- Measured value/true value| *
100
**there is a percent error program
Lab 1: Measurement
How do you find the area of an object? - Answers - pi * radius of the circle squared
**there is a circle area program
Lab 1: Measurement
How do you find the volume of an object? - Answers - (4/3)*pi*R^3
**there is a sphere volume program
Lab 1: Measurement
What was the purpose of this experiment? - Answers - The purpose of this experiment
is to become familiar with methods of measurement and error.
Lab 1: Measurement
What is the standard unit for length, mass, and time in the MKS metric system? -
Answers - Meter, Kilogram, Second
Lab 1: Measurement
Why are units important when reporting the result of a measurement? - Answers - Units
are important because they allow for a comparison to a standard which helps to
understand the results.
Lab 1: Measurement
An object is estimated to be 2.5 cm long. When measured with a Vernier caliper its true
length is determined to be 2.47 cm. What is the percent error of the estimated value? -
Answers - 1.21 %
, Lab 1: Measurement
Complete the following calculations using the explanation of significant figures given
below. When multiplying and dividing several quantities, the number of significant
figures in the final answer is the same as the number of significant figures in the
quantity with the least amount of significant figures that is being multiplied. When adding
and subtracting several quantities, the number of decimal places in the result should
equal the smallest number of decimal places of any term in the sum.
Given: x= 12.24 y= 5400 z=11.572
Determine:
x*y*z=
x+z= - Answers - x*y*z= 7.6 x 10^5
x+z= 23.81
Lab 1: Measurement
Consider the results of your reflex time measurement. What precision, in fractions of
seconds, can you claim for the stopwatch? - Answers - A stopwatch has precision to the
hundreds place whereas the reflex testing is precise to the tenths place so there is a
limit to its precision.
Convert the following measurement:
4.54 cm to mm - Answers - 45.4 mm
Convert the following measurement:
4.54 kg to grams - Answers - 4540 grams
A motion detector works by sending out an inaudible (i.e., ultrasonic) sound beam and
timing the time it takes to travel from a motion detector to an object and back. The
representation of this is a plot of distance versus time. Knowing this, which plot is of a
stationary object?Explain your answer. - Answers - This is stationary because there is
no acceleration.
A motion detector works by sending out an inaudible (i.e., ultrasonic) sound beam and
timing the time it takes to travel from a motion detector to an object and back. The
representation of this is a plot of distance versus time. Knowing this, which plot is of an
object moving away from the motion detector. Explain your answer. - Answers -
Distance increases with increased time as you walk away from the motion detector
Lab 2: Motion
