What is the value of u in the sequence 2 , 7 , 14 , 23 , 34 , u ?

The specific heat capacity of a particular liquid is 3000 J kg^-1 K^-1. A large beaker containing 2 kg of the liquid has to be warmed from 25 ℃ to 35 ℃. A 100 W heater is used. If all the thermal energy could be transferred to the liquid, how long would it take?

Identify the order in which the ancestors of the Caribbean people arrived in the region.

1. Amerindians
2. East Indians
3. Europeans
4. Africans

Decomposers are important in the process of decay because:

The number of electrons in a full electron shell is:

The aim of the experiment shown above was to find out if:

3 ⁴/₅ expressed as a decimal is

All of the following items are widely used input devices EXCEPT the __________.

When a metal wire carries an electric current, charges flow through it.The moving charges are:

Which of the following items is not a component of a graphical user interface?

Acid soils can be neutralised by adding:

The type of bonding that involves loss or gain of electrons is called:

The state symbol for a solution in water is:

Instruction: Choose from the four options the word or pair of words which BEST completes the meaning of the sentence.

Despite his short-temper, his willingness to give of his wealth to help others to succeed led people to call him ............

All of these are alkenes EXCEPT for:

A square has the same area as a rectangle with sides of length 9 centimetres and 16 centimetres. What is the length of the square?

All of these are used as food additives EXCEPT for:

A detector close to a sample of radioactive material records 76 counts per second (cps). Precisely 2 days later the count rate has fallen to 22 cps.The count rate due to background radiation, taken immediately before and after the experiment, averaged 4 cps. The half-life of the material is:

Which of the following statements is true?

The gas that relights a glowing splint is: