WorksheetsF4 Physics EOY 2020-21
Total questions: 65
Worksheet time: 5hrs 25mins
Which of these processes describes a nuclear fusion reaction?
A nucleus absorbs energy to produce lighter nuclei.
A nucleus splits to produce energy and lighter nuclei
Two nuclei bind together to produce energy and heavier nuclei.
Two nuclei bind together to produce energy and a lighter nuclei.
If there are 146 neutrons in 238U, how many neutrons
are found in the nucleus of 235U?
141
143
145
147
A pure sample of nuclide X containing N nuclei has an activity A. The half-life of X is 6000 years. A pure sample of nuclide Y containing 3N nuclei has an activity 6A. What is the half-life of nuclide Y?
1000 years
3000 years
12 000 years
18 000 years
In the Rutherford scattering experiment most α particles passed through the foil undeflected. What is a correct deduction from this result?
Most of the mass of an atom is within the nucleus.
The diameter of the nucleus is much less than the diameter of the atom.
The nucleus has a positive charge.
The charge of the atom is neutral.
A radioactive source contains a nuclide which has a half-life of 12 hours. A detector placed near the source records an average count rate of 180 counts per minute. The average background count rate is 20 counts per minute. What will be the average count rate after 24 hours?
40 counts per minute
45 counts per minute
50 counts per minute
60 counts per minute
The diagram shows 32 atoms.
16 of the Red are parent isotopes
16 of the Green are daughter isotopes
How many half-lives have occurred?
0
1
2
3
Select the uses of static electricity.
laser printers
plug sockets
removing smoke from chimneys
insecticide sprayers
Electrostatic paint sprayer form an even spray of paint droplets. This is because...
the droplets have opposite charges, so stick to each other
the droplets are attracted to the object
the droplets all have the same charge, so repel each other equally
the droplets have equal charges, so all stick to the object
Perform the following calculation, and round to the correct number of significant figures.
3400 / 0.25 =
(a)
0.00401 x 2.00 x 501
1.256 - 0.004 + 123.09 = ?
This is the x-tgraph of the motion of a particle. Of the four points P, Q, R,and S, the speed is greatest at
P
Q
R
S
An object moves along the x-axis with constant acceleration. The initial position x is positive, the initial velocity is negative, and the acceleration is positive.
Which of the following vx-t graphs best describes this motion?
Solve 3a−2×27a=811 .
a=−2
a=21
a=2
a=−21
Solve 25x+2=625x1 .
x=−32
x=32
x=−23
x=23
Solve 9(3x−1)=27x .
x=−2
x=2
x=−21
x=21
Which of these is NOT true for systematic errors?
They arise due to errors in the measuring instruments used.
Repeating the observations or increasing the sample size can eliminate them
They are reproducible inaccuracies that are consistently in the same direction.
They arise from the design of the study.
Systematic errors lead to a lack of:
accuracy in the measurement.
significant digits in the measurement.
precision in the measurement.
gradation of the measuring instrument
Random errors lead to a lack of:
accuracy in the measurement.
significant digits in the measurement.
precision in the measurement.
gradation of the measuring instrument
Two students A and B measured the diameter of a wire in mm.
Data A: 1.57, 1.58, 1.43, 1.50, 1.42 Average of data A: 1.50
Data B: 1.60, 1.59, 1.59, 1.60, 1.62 Average of data B: 1.60
Actual diameter is known to be 1.50 mm.
Whose data is more precise?
A, because the values in his data are close to each other
B, because the values in his data are close to each other
A, because the average value is close to the actual value
B, because the average value is close to the actual value
Two students A and B measured the diameter of a wire in mm.
Data A: 1.57, 1.58, 1.43, 1.50, 1.42 Average of data A: 1.50
Data B: 1.60, 1.59, 1.59, 1.60, 1.62 Average of data B: 1.60
Actual diameter is known to be 1.50 mm.
Whose data is more accurate?
A, because the values in his data are close to each other
B, because the values in his data are close to each other
A, because the average value is close to the actual value
B, because the average value is close to the actual value
Which of the following is NOT an example of random error?
Measuring wind velocity depends on the height and time at which a measurement is taken. Multiple readings must be taken and averaged because gusts and changes in direction affect the value.
Readings must be estimated when they fall between marks on a scale or when the thickness of a measurement marking is taken into account.
When taking a volume reading in a flask, you may read the value from a different angle each time.
Measuring length with a metal ruler will give a different result at a cold temperature than at a hot temperature, due to thermal expansion of the material.
Michael walks in the following order: from Point A, to Point B, and finally to Point C. Which is true?
Distance and displacement are EQUAL
Distance is less than displacement
Displacement is less than distance.
What is the reading on the vernier calipers?
8.62 cm
8.62 mm
8.52 cm
8.63 cm
The reading of the micrometer is .............................
12.40mm
12.5mm
12.04mm
What is the name of the part labelled B in the diagram?
Slider
Internal jaws
Outside jaws
Depth bar
Main scale
What is the reading on the vernier calipers?
(a)
Diagram above: jaws tightly closed
Diagram below: jaws measuring an object
What is the corrected reading of the Vernier calipers?
0.03 cm
1.03 cm
1.06 cm
1.09 cm
What is the mass on the triple beam balance?
917 g
791 g
190.7 g
197 g
What is the mass on the triple beam balance?
511.2 g
151.2 g
152.1 g
521.2 g
Which of the balances below shows 413.3 g?
When using scientific notation, a negative exponent means ...
the standard number is greater than one
the standard number is less than one
the negative sign doesn't have a meaning
None of the above
Solve:
(20 x 1050) / (4 x 1015)
2.4 x 1051
5 x 1065
8 x 1066
5 x 1035
(5.4×10?)(3.2×10³) = 17.28×1015
7.6×10⁴ ? 0.00076
In which side of the graph does the spring obey Hooke's law?
To the left of point A
To the right of point A
Which ones are fundamental units?
Length
Force
Luminous Intensity
Volume
Electric Current
Systematic error definition
This error are due to unknown causes and occur even when all systematic errors have been account for.
Generally the fault of the person using the instruments; such as incorrect reading, recording or use.
An error that is not determined by chance but is introduced by an inaccuracy (as of observation or measurement) inherent in the system
On a graph, which axis shows the manipulated variable?
x-axis
y-axis
neither
it changes
Select all that applies
Scalar quantities
temperature
force
density
electric charge
Suggest way that a scientist can protect themselves against exposure when handling radioactive sources.
Storing sources in a lead–lined box using tongs
Goggles and gloves
Tie hair back
The illustration shows a part of an analogue-digital scale. The digital scale gives a numerical readout of the pointer reading. Which of the following is correct ?
The digital scale is non-linear
The digital scale is linear
The digital scale is both linear and non-linear
The digital scale is neither linear nor non-linear
Which is the best description of the clock shown?
All the scales are linear
At least two scales are linear and two are non-linear
All the scales are non-linear
Three scales are linear and one non-linear
What best describes the type of scale?
Analogue, Non-linear
Analogue, Linear
Linear
Non-Linear
You walk 80m east on FM 518 to get some Whataburger. After getting there, your friend texts you that Red River is giving out free stuff so you head the 65 m south there. After that, you decide to head to the gas station for a nice drink to cool down, you head the 80 m west there. Suddenly you realize you forgot your wallet at school, you wonder, "how did I buy all that stuff?" and you run the 65m north back. What is your total displacement?
0m
290m
518m
80m
Convert 0.763 kg to μg.
7.63 x 108 μg
7.63 x 10-4 μg
Convert 45 μs to ms.
0.045 ms
45000 ms
An experiment was carried out to investigate the relationship between the period of a simple pendulum and its length. A brass bob of 50g was used in the experiment. What is the manipulated variable?
Amplitude
Mass of brass bob
Length of pendulum
Period of the simple pendulum
Which of the following graphs shows that P increases with but is not directly proportional to θ ?
