Abstract This experiment is to study and measure the enzyme activity of β-galactosidase in the different concentrations of o-Nitrophenylgalactoside (ONPG) using a spectrophotometer. The spectrophotometer was also set at 420nm‚ a wavelength which is best for recording the absorbance values for the experiment. From the results‚ 0.9mM ONPG solution has the highest absorbance and 0.1mM ONPG solution has the least. Also‚ 0.5mM ONPG solution has the highest rate of enzyme activity and it is the most efficient
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Static Electricity Virtual Lab Name: __________________________ Physical Science Date: ___________________________ Part I: Balloons and Static Electricity: Go to https://phet.colorado.edu/en/simulation/balloons-and-static-electricity 1) Before moving the balloon‚ how many positive and negative signs are on the balloon? 4 positive and 4 negative 2) Use your mouse pad to rub the balloon against the sweater. -What are the charges that are NOW found on the balloon? All the sweaters negative
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只限閱卷員參閱 FOR MARKERS’ USE ONLY May 4‚ 2012 香港考試及評核局 HONG KONG EXAMINATIONS AND ASSESSMENT AUTHORITY 2012 年香港中學文憑考試 HONG KONG DIPLOMA OF SECONDARY EDUCATION EXAMINATION 2012 物理 香港中學文憑考試 試卷一乙 PHYSICS HKDSE PAPER 1B 本評卷參考乃考評局專為今年本科考試而編寫，供閱卷員參考 之用。閱卷員在完成閱卷工作後，若將本評卷參考提供其任教 會考班的本科同事參閱，本局不表反對，但須切記，在任何情 況下均不得容許本評卷參考落入學生手中。學生若索閱或求取 此等文件，閱卷員/教師應嚴詞拒絕，因學生極可能將評卷參 考視為標準答案，以致但知硬背死記，活剝生吞。這種落伍的 學習態度，既不符現代教育原則，亦有違考試著重理解能力與 運用技巧之旨。因此，本局籲請各閱卷員/教師通力合作，堅 守上述原則。 This marking scheme has been prepared by the Hong Kong
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PHYSICS PROJECT TO STUDY THE OPTICAL LENS OF A HUMAN EYE Eyes are organs that detect light‚ and convert it to electro-chemical impulses in neurons. The simplest photoreceptors in conscious vision connect light to movement. In higher organisms the eye is a complex optical system which collects light from the surrounding environment; regulates its intensity through a diaphragm; focuses it through an adjustable assembly of lenses to form an image; converts this image into a set of electrical signals;
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EXPERIMENT 3-CHEMICAL KINETICS: THE IODINE-CLOCK REACTION J.CHAN1 and C.CABANLIG2 1NATIONAL INSTITUTE OF MOLECULAR BIOLOGY AND BIOTECHNOLOGY‚ COLLEGE OF SCIENCE 2NATIONAL INSTITUTE OF MOLECULAR BIOLOGY AND BIOTECHNOLOGY‚ COLLEGE OF SCIENCE UNIVERSITY OF THE PHILIPPINES‚ DILIMAN‚ QUEZON CITY 1101‚ PHILIPPINES DATE SUBMITTED: JANUARY 8‚ 2013 DATE PERFORMED: DECEMBER 5‚ 2012 ------------------------------------------------- ABSTRACT The kinetics of the reaction between persulfate (S2O82-)
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Call 1600-111-533 (toll-free) for info. Formula Booklet – Physics XI Dear students Most students tend to take it easy after the board examinations of Class X. The summer vacations immediately after Class X are a great opportunity for the students to race ahead of other students in the competitive world of IITJEE‚ where less than 2% students get selected every year for the prestigious institutes. Some students get governed completely by the emphasis laid by the teachers of the school in which they
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Toy cars have been played with by children for many years. Would one wonder the way a model or toy car rolls down a hill? One would think it would be because it has wheels‚ this is true but there is more to a car rolling downhill than it having wheels. Gravity is the force that is keeping all things on the ground. The heavier an object is the more gravity has an effect on its momentum. If you put a toy car on a downhill slope it will begin to roll because of gravity. The more the car weighs will
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Difference between Static and Dynamic RAM The journey of dynamic and static RAM was initiated in 1960s which was readily developed in 1970s. In recent days‚ the technology is much more user friendly. RAM is classified into two types: Dynamic RAM and Static RAM. Static RAM uses a form of flip-flop to circulate data. It uses almost six transistors for its functioning. On the other hand‚ Dynamic RAM (DRAM) is typically charged on the capacitor in it. Static RAM holds the data in the
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Laboratory III: Forces Problem IV: Normal and Kinetic Frictional Force I John Greavu March 13‚ 2013 Physics 1301W‚ Professor: Evan Frodermann‚ TA: Mark Pepin Abstract The dependence of two-dimensional velocity and position components on time as well as whether or not said components are constant was determined. Video was recorded of a ball being projected laterally and data of its flight were plotted. From analyzing the data and the corresponding graphs that followed‚ it was shown that while the
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force of gravity. - Surfers rely on weather conditions‚ their equipment‚ safety‚ and their techniques. - Low tide waves are faster‚ stronger‚ and tend to close-out - High tide waves are slower‚ and lose force. • Surfing has a wide background of physics • The amplitude in a wave grows as energy is added to it‚ and it shrinks when energy is subtracted from it. - The speed of the wave‚ and the buoyancy of the board is what keeps the ability to ride the wave and maintain speed. - When you are surfing
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