A string of length 4m is extended by 0.02m when a load of 0.4kg is suspended at its end. What will be the length of the string when the applied force is 15N?

• A) 4.05m
• B) 4.08m
• C) 5.05m
• D) 6.08m

When two waves are superimposed on each other, the following occurrences are possible, except

• A. nodal lins
• B. anti nodal lines
• C. stationary waves
• D. dispersion

A lead bullet of mass 0.05kg is fired with a velocity of 200ms−1 into a block of mass 0.95kg. Given that the lead block can move freely, the final kinetic energy after impact is?

• A. 50J
• B. 100J
• C. 150J
• D. 200J

Which of the following quantities has the same unit as the watt?

• A. Force x time
• B. Force x distance
• C. Force x acceleration
• D. Force x velocity

A room is heated by means of a charcoal fire, An occupant of the room standing away from the fire is warmed mainly by

• A. convection
• B. radiation
• C. conduction
• D. reflection

The rising of a liquid in an open and ended glass tube of narrow bore is

• A. osmosis
• B. adhesion
• C. capillarity
• D. surface tension

A positive charged rod X is brought near as uncharged metal sphere Y and is then touched by a finger with X still in place. When the finger is removed, the result is that y has

• A. no charge and a zero potential
• B. a positive charge and zero potential
• C. a negative charge and positive potential
• D. a negative charge and a negative potential

a. Define each of the following terms used with simple machines:

i. Pivot ii.Load iii. Efficiency.

b. A truck of mass 1.2 × \(10^3\) kg is pulled from rest by a constant horizontal force of 25.2N on a leveled road. If the maximum speed attainable in the process is 60 km/h.

Calculate the: i. work done by the force; ii. distance traveled by the truck in reaching the maximum speed.

c. Statetwo differences between absolute zero temperature and ice point.

d. An uncalibrated liquid-in-glass thermometer was used in determining a Celsius temperature. The readings are tabulated below

A loaded test-tube which floats upright in water is carefully and slightly depressed and then released. Which of the following best describes the sub-sequent motion of the test-tube?

• A. Circular
• B. Rotational
• C. Random
• D. Oscillatory

Define upper fixed point and lower fixed point as used in thermometry

(b) The electrical resistances of the element in a platinum restistance thermometer at 100\(^o\)C, 0\(^o\) and room temperature are 75.000, 63.000 and 64.992 \(\Omega\) respectively. Use these data to determine the room temperature.

(c) (i) State Boyle's law

(ii) A uniform capillary tube, closed at one end contained dry air trapped by a thread of mecury 8.5 x 10\(^{-2}\)m long. When the tube was held horinzontally, the length of the air column was 5.0 x 10\(^{-2}\)m, when it was held vertically with the closed end downwards, the length was 4.5 x 10\(^{-2}\)m, Determine the value of the atmospheric pressure. [g = 10ms\(^{-2}\), density of mecury = 1.36 x 10\(^4\) kg m\(^{-3}\)]