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(a) State two factors on which surface tension depends. (b) How can mosquito larvae be made to sink in stagnant water?

The heat required to raise a mass of a substance through 1K is known as

In the clinical thermometer, the function of the kink is to i. Prevent the back flow of mercury after use. ii. Ensure the back flow of mercury after use. iii. Maintain the thermometric property of mercury. iv. Allow the temperature attained to be read.

The diagram given is used to determine the

An aluminium rod of length 1.8m at 10^\circC is heated to proceed produce a difference in length of 0.007m. Calculate the temperature to which it is heated. (Linear expansivity of aluminium = 2.3 x 10\(^{-5}\)K\(^{-1}\)

A mercury-in-glass thermometer read 4cm at ice point and 29cm at steam point. Calculate the temperature when the mercury level is at 9cm

You are provided with a beaker, a thermometer, a stirrer, a measuring cylinder, a bunsen burner, a wire gauze, a 50g mass, a pair of tongs, water, tripod stand, and other necessary materials. i. Using the measuring cylinder, measure 150cm\(^{3}\) of water into the beaker. ii. Record the volume v of the water in the beaker iii. Calculate the mass m of the water, given that m = pv and; p = 1gcm\(_{-3}\). iv. Measure and record the initial temperature \(\theta_{0}\) of the water in the beaker. v. Hold the 50g mass with the pair of tongs in the flame of the bunsen burner for 2 minutes. vi. Quickly transfer the 50g mass to water in the beaker. vii. Stir gently and record the highest temperature \(\theta_{1}\), attained viii. Evaluate \(\theta\) = (\(\theta_{1}\) - \(\theta_{0}\)). ix. Empty the content of the beaker and repeat the procedures above for the values of v = 200cm\(^{3}\), 250cm\(^{3}\), 300cm\(^{3}\), and 350 cm\(^{3}\). x. Tabulate your readings. xi. Plot a graph with m on the vertical axis and \(\theta\) on the horizontal axis. xii. Determine the slope, s, of the graph. xiii. Evaluate k = \(\frac{50}{s}\). xiv. State two precautions taken to obtain accurate results. (b)i. Define heat capacity. ii. An electric kettle rated 1.2kw is used to heat 800g of water initially at a temperature of 20 C. Neglecting heat losses, calculate the time taken for the kettle to heat the water to its boiling point. [Take the boiling point of water= 101 C specific heat capacity of water = 4200 Jkg' K'1 (odv)

The direction of the path taken by light is called

The general gas law can be written as

In which of the following device is the expansion of solid not required? I. Simple pendulum II. Fire alarms III. Thermostat IV. Bimetallic thermometer

Heat transfer in the surrounding without a material medium is possible through?

What type of electromagnetic radiation can be used to take photographs in the haze?

A zinc has a heat capacity of 40 J/K, what is the mass of the zinc, given that the specific heat of zinc is 380 J/kg k

For a best result using temperature to achieve an accurate measurement, it is best to use

The two liquids which are often used in thermometer on experiment basic is known as