A horizontal length of pipe XY contains water. Water will MOST LIKELY flow in the direction XY if the pressure at X is atmospheric and at Y the pressure is a. equal to the pressure of the water in the pipe b. atmospheric c. less than atmospheric d. greater than atmospheric In a city water distribution system, the large overhead water tank makes use of the fact that at the wider the tank is as compared to the width of the pipe, the greater the water pressure would be at ground level b. the greater the height of the water level in the tank, the greater the water pressure would be at ground level c. the larger the mass of water in the tank, the greater the water pressure would be at ground level the larger the volume of water in the tank, the greater the water pressure would be at ground level Water emerges from a fine nozzle of a hose at high speed. This is a consequence of a. Bernouille's Principle b. Pascal's Principle c. Archimedes' Principle d. The Principle of Conservation of Momentum An aeroplane wing is designed to provide a large force of a. Upthrust b. Lift 0. Drag d. Thrust What form of energy does kerosene store? a. Heat energy b. Light energy c. Chemical energy d. Kinetic energy In a roller coaster, when at rest at the top, the energy is MAINLY a. sound energy b. kinetic energy 0. heat energy d. potential energy Which of the following is a definition of heat? a. Heat is thermal energy that flows spontaneously from a hot substance to a cold substance. b. Heat is a measure of the average kinetic energy of a substance. c. Heat is thermal energy that flows spontaneously from a cold substance to a hot substance. d. Heat is a measure of hotness of a substance. Thermodynamics is the study of a. sound and forces b. heat and work 0. heat and forces d. sound and heat Which law of thermodynamics is a statement that in any energy conversion process some energy is always lost to the environment? a. Third Law b. First Law c. Second Law d. Zeroth Law In wind instruments, a node is a place where air hardly vibrates, and an antinode is a place where air vibrates very much If a conch shell is modelled as a pipe with one end open and the other end closed at the open end is an antinode bt both ends are antinodes ct both ends are nodes d. the open end is a node The vibrating length of a GUITAR string in the fundamental mode is at one wavelength bt quarter wavelength ct half wavelength at. three quarters wavelength Tides are produced by at the gravitational pull of the Moon only on the Earth's ocean b the gravitational pull of the Moon and the Sun on the Earth's ocean ct the gravitational pull of the Sun only on the Earth's ocean at. gale force winds on the ocean surface A flute is, in effect, an open-ended pipe of ends A and B In the fundamental mode, there is a node at at the end B only b. at both ends A and B c at the end A only dt halfway between A and B Which harmonic is three octaves higher in pitch than the fundamental? at 8th b. 4th ct 6th dt 3rd A ruler of length 30 cm is clamped at one end and plucked at the other end so as to vibrate in the fundamental mode' If the speed of waves in the ruler is 180 m/s, what is the rulers fundamental frequency? a. 150 Hz bf 54 Hz c 600 Hz at. 5400 Hz If the fundamental pitch of a drumhead is assigned a value of 1.000, what is the pitch in its third overtone mode of vibration? at. 2.917 b. 1.503 c. 2.136 d. 2.295 An ideal freezer is an example of a a. whitebody b. heat engine 0. blackbody d. heat pump 200 J of work is used to remove 1200 J of heat from food at 280 K by an ideal freezer. How much heat is delivered to the room air? a. -1000 J b. 1400 J C. 1000 J d. -1400 J During the compression stroke in a four-stroke engine cylinder, the fuel and the air O a. become hot gas and do work O b. are squeezed into a small volume O c. enter the cylinder O d. are ignited by the spark plug The heat capacity of a 4.0 kg glass container is 3360 J/K. What is the specific heat of the glass? O a. 840 J/K O b. 840 J/kg, K O c. 13440 J/K O d. 13440 J/kg.K