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Valeriya
Questions and answers by visitors named
Valeriya
Questions (10)
An object of mass 50 g floats in a liquid of density 2.5 g/ml. When the object is placed in a liquid of density 2.0 g/ml, it
4 answers
asked by
Valeriya
4,054 views
ABCDE is a circle with centre O. The diameter, AC, is extended to the point F so that CF = 16 cm. The line BF is the tangent to
4 answers
2,929 views
A bag contains 8 blue and 2 red balls. Three balls are chosen at the same time at random from the bag. What is the probability
5 answers
4,180 views
Two aluminium spheres P and Q, of masses 0.50 kg and 1.0 kg respectively, are released at the same time from the same height.
Why
4 answers
1,215 views
David has two boxes containing shapes.
In box A there are 4 stars and 2 hearts. In box B there are 2 stars and 1 heart. David
5 answers
4,260 views
Two radioactive sources X and Y have half-lives of 3.0 hours and 2.0 hours, respectively. The product of the decay is a stable
3 answers
760 views
Car X passes car Y on a motorway. Car X is travelling at 1.5 times the speed of car Y. The mass of car X is 5/4 of the mass car
2 answers
601 views
Basket A contains 4 apples, 6 oranges, and 2 lemons. Basket B contains 5 apples, 4 oranges, and 6 lemons. You are to get two
3 answers
2,512 views
Which of the following is/are responsible for the transfer of thermal energy from a candle flame: conduction, convection,
2 answers
559 views
The trapezoid has a height of 24. E is a point where the trapezoid touches the inner circle, so that BE:EA = 9:16. Find the
2 answers
534 views
