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7945 quizzes
A coil of 2 H has no resistance. It is joined across a capacitor of 8 µF that has been charged to 40 V. What is the largest current that flows? New
High School (11–12) · Alternating Current
A-LevelIBAEEE (Amrita)+19A-LevelIB
StemPy LabStemPy Lab
Hard
A gene has the sequence GAG in its coding strand, and a mutation changes it to GTG. The change in the protein is that New
High School (11–12) · Biomolecules
StemPy LabStemPy Lab
Hard
A hemispherical bowl of radius 10 cm stands with its flat rim on top, as in the picture. It holds water 4 cm deep at the middle. What volume of water does it hold? New
High School (11–12) · Application of Integrals
APA-LevelIB+20APA-LevelIB
StemPy LabStemPy Lab
Hard
A drug stops the spindle from forming in dividing cells. In which stage do the cells collect, and which checkpoint holds them? New
High School (11–12) · Cell Cycle and Cell Division
APA-LevelIB+13APA-LevelIB
StemPy LabStemPy Lab
Hard
A student types six expressions, one at a time, into a fresh Python session. Which of them give a value, instead of an error message? Choose every correct option. New
High School (9–10) · Errors and Exceptions
PCEP (Python Institute)PCEP (Python Institute)
StemPy LabStemPy Lab
Hard
Which sentence is the best limit for a report on 20 winter days in one hill town?
Middle Stage (6–8), High School (9–10), High School (11–12), Undergraduate, General · Averages: Mean, Median and Mode
StemPy LabStemPy Lab
Easy
An inductor of 0.9 H and a capacitor of 10 µF are joined in a loop with no resistance. At what angular frequency does the charge oscillate? New
High School (11–12) · Alternating Current
A-LevelIBAEEE (Amrita)+19A-LevelIB
StemPy LabStemPy Lab
Medium
A circular DNA of 2000 base pairs is stretched out into a straight double helix. How long is it, in micrometres? New
High School (11–12) · Biomolecules
StemPy LabStemPy Lab
Hard
A cyclist rides for 6 hours. Her speed v(t) in km per hour is a continuous function of the time t in hours, and she covers 30 km in all. Which statement must be true? New
High School (11–12) · Application of Integrals
APA-LevelIB+20APA-LevelIB
StemPy LabStemPy Lab
Medium
After anaphase, the activity of the M cyclin and CDK complex falls sharply. What is the reason? New
High School (11–12) · Cell Cycle and Cell Division
APA-LevelIB+13APA-LevelIB
StemPy LabStemPy Lab
Hard
A loop prints a value in a try block. One item is the text "2", and only one kind of error is handled. What happens when the program runs? New
High School (9–10) · Errors and Exceptions
PCEP (Python Institute)PCEP (Python Institute)
StemPy LabStemPy Lab
Advanced
A student writes: \"The mean highest temperature in the hill town was 12 °C, so every day was about 12 °C.\" What is wrong?
Middle Stage (6–8), High School (9–10), High School (11–12), Undergraduate, General · Averages: Mean, Median and Mode
StemPy LabStemPy Lab
Medium
An LC circuit has no resistance. Which statement describes the circuit at the instant when the capacitor holds no charge? New
High School (11–12) · Alternating Current
A-LevelIBAEEE (Amrita)+19A-LevelIB
StemPy LabStemPy Lab
Medium
Assertion (A): An excess of vitamin C is rarely harmful. Reason (R): Vitamin C is water-soluble, and the excess is lost in the urine. New
High School (11–12) · Biomolecules
StemPy LabStemPy Lab
Medium
A winding footpath follows the curve y = 2/3x^(3/2) from x = 0 to x = 8, with x and y in metres. The council wants to know the length of the path. How long is it? New
High School (11–12) · Application of Integrals
APA-LevelIB+20APA-LevelIB
StemPy LabStemPy Lab
Hard
When the Rb protein is not phosphorylated, it binds E2F. What is the effect? New
High School (11–12) · Cell Cycle and Cell Division
APA-LevelIB+13APA-LevelIB
StemPy LabStemPy Lab
Hard
A try statement has three except blocks, and the error fits more than one of them. What does the program print? New
High School (9–10) · Errors and Exceptions
PCEP (Python Institute)PCEP (Python Institute)
StemPy LabStemPy Lab
Hard
In the hill town, the 3 snowy days had a mean highest temperature of 8.7 °C, and the other 17 days 12.5 °C. What may a report say?
Middle Stage (6–8), High School (9–10), High School (11–12), Undergraduate, General · Averages: Mean, Median and Mode
APIBAPIB
StemPy LabStemPy Lab
Medium
A cable of total resistance 6 Ω is fed with 36 kW at 4 kV. The power factor is 1. How much of the power is lost as heat in the cable? New
High School (11–12) · Alternating Current
A-LevelIBAEEE (Amrita)+19A-LevelIB
StemPy LabStemPy Lab
Medium
Analysis of a double-stranded DNA shows that its guanine makes up 21% of all the bases. What is the percentage of thymine? New
High School (11–12) · Biomolecules
StemPy LabStemPy Lab
Medium
A farm tank in a dry region is filled by a pump. The rate of inflow is r(t) = 24 - 3t litres per minute, for 0 ≤ t ≤ 8 minutes, where t is the time since the pump started. How many litres enter the tank in the eight minutes? New
High School (11–12) · Application of Integrals
APA-LevelIB+20APA-LevelIB
StemPy LabStemPy Lab
Medium
One cell of a tissue culture divides every 8 h, and each new cell does the same. None dies. How many cells are there after 2 days? New
High School (11–12) · Cell Cycle and Cell Division
APA-LevelIB+13APA-LevelIB
StemPy LabStemPy Lab
Medium
A loop adds a note to a list before a statement that can fail. Two except blocks add other notes. What does the program print? New
High School (9–10) · Errors and Exceptions
PCEP (Python Institute)PCEP (Python Institute)
StemPy LabStemPy Lab
Hard
The chance of a snowy day is 0.15. If each day's weather did not depend on the day before, what would be the chance of two snowy days in a row?
Middle Stage (6–8), High School (9–10), High School (11–12), Undergraduate, General · Averages: Mean, Median and Mode
APIBAPIB
StemPy LabStemPy Lab
Hard
Why is electric power sent over long distances at a very high voltage? New
High School (11–12) · Alternating Current
A-LevelIBAEEE (Amrita)+19A-LevelIB
StemPy LabStemPy Lab
Medium
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