physics2u

Only a few days for exam. All physics lecturer would like to say and wish…

“Good Luck and All the Best, May Allah Bless You…” - Miss Roslia

“Wish and all da Best” - Miss NorMadiah

“Good Luck and All the Best” - Miss Chin

“To best the best, beat the rest” - Miss Rebecca

“DARE TO EXCELL” - Mr. Ronald

“Gagal sekali tidak bermakna tidak akan gagal lagi!!” - Mr. Yusfi

“Physics is fun. So, simplify it” -Mr Amin

“Mistakes are the stepping stone to success. Good Luck!!” -Madam Lilis

“Usaha + Doa + Tawakkal += berjaya di dunia dan akhirat” - Miss Latifah

“Do the best…!!!” -Madam Azeaty

“All the best…” - Mr Edward

“Selamat Maju Jaya” - Mr Zul Azri

“Selamat Berjaya kepada semua” - Mr. Zulfadli Z

“Selamat Berjaya dan Do the Best..!!!” - Mr. Zulfadli

” [(Force + Work)²-Pressure] x Discipline = Excellence” - Mr Husaine

“Be the best among the best” - Mr Shaiful

Question

a) Define adiabatic process.

[ 3 marks ]

b) Figure above shows various process in the PV-plane for an ideal gas. The process AC is an adiabatic, AB is an isotherm, and BC is a constant-volume process. The heat is added to the gas along AB is 400 cal. The change in internal energy from C to A is 1000 cal, and the shaded area is 150 cal.

i) How much work is done by the gas from A to B.

ii) What is the change in internal energy from C to D.

( 252 cal = 1.054 x 10³ J )

[ 7 marks ]

Ans: a) Refer to your lecturer. b.i) 627.4 J ; ii) -3.555 x 10³ J.

Question

a) Write the ideal equation and explain the terms used.

[ 3 marks ]

b) 20 litres of an ideal gas is kept at 40 ^oC and at a pressure of 1 atm. The gas is heated and expands to a volume of 25 litres and a pressure of 4 atm. Calculate

i) the number of moles in the gas,

ii) the final temperature.

[ 7 marks ]

Ans: a) Refer to your lecturer. b.i) 0.769 ; ii) 1 565 K.

Question

a) Define thermal conductivity.

[ 3 marks ]

b) One end of a well-insulated copper rod of length 40 cm and of cross-sectional area 1.0 cm² is maintained at a constant temperature of 100 ^oC, while the other end is kept at 0 ^oC. The heat is flowing steadily along the rod. Calculate

i) the temperature gradient of the rod.

ii) the rate of heat flow of the rod.

[ 7 marks ]

Ans: a) Refer to your lecturer. b.i) 250 ^oCm^-1 ; ii) 9.75 W.

Question

a) Ice has a density of 0.92 × 10³ kgm^-3, and therefore floats in water. What fraction of a floating piece of ice is submerged?

[ 3 marks ]

b) A single ice cube of mass 8.4 g floats in a glass that is completely full of 350 cm³ of water. Ignore the water’s surface tension and its variation in density with temperature (as long as it remains a liquid).

i) When the ice cube has completely melted, has any water overflowed? Explain.

ii) Suppose the water in the glass had been very salty water of density 1050 kgm^-3. What volume of salt water would the 8.4g ice cube displace?

[ 7 marks ]

Ans: a) 0.92. b.i) No ; ii) 8 x 10^-6 m^-3.

Question

a) Distinguish between elastic and plastic deformation.

[ 4 marks ]

b) A wire of length 0.50 m is fixed horizontally between two supports separated by 0.50 m. When a mass of 8.0kg object is hung from the middle of the wire, the mid-point of the wire sags by 1.00 cm. The diameter of the wire is 2.8 mm. Calculate the Young’s modulus of the wire.

[ 6 marks ]

Ans: a) Refer to your lecturer. b) 1.99 x 10¹¹ Pa

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Take your time for more effort and preparation in final examination from now… Don’t waste your time. We know all matriculation students facing the final semester 1 exam. Physics paper will held on 31st October. Paper 2 on the morning and Paper 1 at the evening. Prepare the best for this exam and make the physics always number one.

Notes : This is important for all students to get a good GPA for this semester to maintain their good CGPA for this academic session.

All student which want the more questions about the physics semester one can download here. Before this, we upload the question from chapter one to the chapter seven. Now, we continue upload the questions starting from chapter eight (gravitation) to chapter 16 (thermodynamics).

Chapter 8 : Gravitation

Chapter 9 : Simple Harmonic Motion

Chapter 10 : Mechanical Waves

Chapter 11 : Sound waves

Chapter 12 : Mechanical Properties of Matter

Chapter 13 : Fluid Mechanic

Chapter 14 : Temperature and Heat Transfer

Chapter 15 : Kinetic Theory of Gases

Chapter 16 : Thermodynamics

Download them and take the challenge to finish this question…