Which of the following is a type of wave that is both mechanical and longitudinal?

How much net work is required to accelerate a 1200 kg car from 10 ms^-1 to 15 ms^-1?

Which of the following is NOT a limitation of experimental measurements?

A lorry accelerates uniformly in a straight line with acceleration of 4ms^-1 and covers a distance of 250 m in a time interval of 10 s. How far will it travel in the next 10 s?

Which of the following is NOT an example of elementary modern physics?

The pinhole camera works on

Rainbow formation is as a result of the combination of which of the following phenomena?
(i) Reflection
(ii) Dispersion
(iii) Total internal reflection
(iv) Refraction

The sensitivity of a thermometer is

The electrolyte used in the Nickel-Iron (NiFe) accumulator is

Name the type of equilibrium for each position of the ball

Which of the following liquids has the highest surface tension?

An explosion occurs at an altitude of 312 m above the ground. If the air temperature is -10.00°C, how long does it take the sound to reach the ground?

[velocity of sound at 0 deg = 331 ms^-1

What is the name of the model of the atom that describes electrons as orbiting the nucleus in specific energy levels?

How much work is done against the gravitational force on a 3.0 kg object when it is carried from the ground floor to the roof of a building, a vertical climb of 240 m?

The surface temperature of a swimming pool on a warm day is 25°C and the temperature at the bottom is 15°C. If the swimming pool has a surface area of 620 m² and a depth of 1.5m. Find the rate at which energy is transferred by conduction from the surface to the bottom of the swimming pool.

[Thermal conductivity of water (k) = 0.6071 Wm^-1K^-1]

Calculate the absolute pressure at the bottom of a lake at a depth of 32.8 m. Assume the density of the water is 1 x 10^-3 kgm^-3 and the air above is at a pressure of 101.3 kPa.

Which of the following is an example of a couple?

A wire of radius 0.2 mm is extended by 0.5% of its length when supported by a load of 1.5 kg. Determine the Young's modulus for the material of the wire.

[Take g = 10 ms^-2]

Which of the following statements is correct about the angle of dip at various points on Earth?

The working of the beam balance is based on the principle of

The property of wave shown in the diagram above is?

A simple pendulum, has a period of 5.77 seconds. When the pendulum is shortened by 3 m, the period is 4.60 seconds. Calculate the new length of the pendulum

In an AC circuit, resonance occurs when the impedance of the circuit is:

A 400 N box is being pushed across a level floor at a constant speed by a force P of 100 N at an angle of 30.0° to the horizontal, as shown in the the diagram below. What is the coefficient of kinetic friction between the box and the floor?

A man swung an object of mass 2 kg in a circular path with a rope 1.2 m long. If the object was swung at 120 rev/min, find the tension in the rope.

Light of wavelength 589 nm in vacuum passes through a piece of fused quartz of index of refraction n = 1.458. What is the frequency of the light in fused quartz?

[Speed of light c = 3 *10⁸ms^-1]

Which of the following thermometers measures temperature from the thermal radiation emitted by objects?

A relative density bottle has a mass of 19 g when empty. When it is completely filled with water, its mass is 66 g. What will be its mass if completely filled with alcohol of relative density 0.8?

When a water droplet is placed on a freshly cut piece of wood, it spreads out to form a thin layer because the wood is

An object is placed 35 cm away from a convex mirror with a focal length of magnitude 15 cm. What is the location of the image?

A step-down transformer is used on a 2.2 kV line to deliver 110 V. How many turns are on the primary windings if the secondary has 25 turns?

A positively charged particle is placed near a negatively charged particle. What is the direction of the electric force between the two particles?

The number of holes in an intrinsic semiconductor

An open-tube mercury manometer is used to measure the pressure in a gas tank. When the atmospheric pressure is 101,325 Pa, what is the absolute pressure in Pa in the tank if the height of the mercury in the open tube is 25 cm higher

Which process is responsible for production of energy in stars?

In the diagram above, if the south poles of two magnets stroke a steel bar, the polarities at X and Y will respectively be

The terminals of a battery of emf 24.0 V and internal resistance of 1.0 Ω is connected to an external resistor 5.0 Ω. Find the terminal p.d.

The branch of physics that deals with the motion of objects and the forces acting on them is called:

A charge of 4.6×10⁻⁵C is placed in an electric field of intensity 3.2×104 Vm⁻¹. What is the force acting on the electron?

Which of the following is a type of incandescent light source?