Boresha ili kuona majibu ya mfano.

Boresha ili kuona majibu ya mfano.

Boresha ili kuona majibu ya mfano.

The figure below shows a snap shot of a wavelength in a string. The numbers on the diagram show scales in centimetres. The speed of travel of the wave is 8 m/s. With reference to this wave motion what is the

Boresha ili kuona majibu ya mfano.

Boresha ili kuona majibu ya mfano.

The above diagram shows a vertical uniform tube containing a mercury thread CB and a volume of air AB. (a) If the atmospheric pressure is 75mmHg, what is the pressure of the air trapped in the tube? (b) If the tube is now turned through 90°, what will be the length of the air column AB?

Boresha ili kuona majibu ya mfano.

With the aid of a diagram, show why a pool of water appears shallower than it really is. A swimming pool is seen to have a depth of 9m when viewed from above. What is its actual depth? (Refractive index of air-water is 4/3)

Boresha ili kuona majibu ya mfano.

Prove that when three resistors; $R_1$, $R_2$ and $R_3$ are arranged in series, the effective resistance, $R_e$ is the sum of the separate resistors. Two 2Ω resistors connected in parallel are connected in series to a 3Ω resistor and then connected to a cell of emf 2v and internal resistance 1Ω. Calculate the current in the circuit.

Boresha ili kuona majibu ya mfano.

Distinguish between a primary colour and a secondary colour. Jessie is wearing a blue with red spots neck-tie. What is the appearance of the neck-tie in (i) blue light? (ii) red light? (iii) yellow light?

Boresha ili kuona majibu ya mfano.

Differentiate between mass and weight. Explain clearly why a given object weighs more on the earth than on the moon.

Boresha ili kuona majibu ya mfano.

The above graph shows a decay curve for a radioactive substance. Use it to determine the half-life of the substance.

((a)(i) The above graph shows a decay curve for a radioactive substance. Use it to determine the half-life of the substance. 5 alama

((b)(i) What is A in equation 14(b)(i) above? 1 alama

Boresha ili kuona majibu ya mfano.

The diagram above illustrates how pressure at a person’s ear varies with time for two different sounds A and B from two different sources. (a) Calculate the frequency of sound A. (b) Comment on the difference in the sounds heard by referring to their pitch and their loudness.

Boresha ili kuona majibu ya mfano.

(a) (i) Distinguish between heat and temperature. (ii) What causes heat to flow from one point to another? (b) Summarize the results of Leslies’ Cube experiment.

Boresha ili kuona majibu ya mfano.

Mention the factors on which the strength of the induced electromotive force depend.

Boresha ili kuona majibu ya mfano.

A transformer has 800 turns in the primary winding and 40 turns in the secondary winding. The alternating e.m.f. connected to the primary winding is 240v and the current flowing is 0.2A. Find the

Boresha ili kuona majibu ya mfano.

500g of water at 100° are added to a thick copper calorimeter at 15°C. The mass of the calorimeter is 1000g. (Specific heat capacity of copper = 0.4J/gK Specific heat capacity of water = 0.42J/gK)

Boresha ili kuona majibu ya mfano.

A car of mass 3000kg is driven from rest with uniform acceleration and reaches a speed of 10m/s in 30 seconds. Find the

Boresha ili kuona majibu ya mfano.

Boresha ili kuona majibu ya mfano.

Figure M shows the same ⋂-core of iron with the four turn coil joined to a lamp instead of a galvanometer. A second ⋂-core of iron is now attached to the first and also has a four-turn coil which is joined to a 2-volt ac. supply.

Boresha ili kuona majibu ya mfano.