1.1 GRAVITY AND GRAVITATIONAL FIELDS 1.1.1 Define weight as the force on an object due to a gravitational field. Weight is the force experienced by an object due to the presence of a gravitational field. This force is directly related to the strength of the gravitational field acting on an object and the mass of that object. m = mass‚ g = acceleration due to gravity m = mass‚ g = acceleration due to gravity Fg = mg Fg = mg 1.1.2 Explain that a change in gravitational
Premium Special relativity General relativity
Supplemental Problems A Glencoe Program Student Edition Teacher Wraparound Edition Teacher Chapter Resources Mini Lab Worksheets Physics Lab Worksheets Study Guide Section Quizzes Reinforcement Enrichment Transparency Masters Transparency Worksheets Chapter Assessment Teacher Classroom Resources Teaching Transparencies Laboratory Manual‚ Student Edition Laboratory Manual‚ Teacher Edition Probeware Laboratory Manual‚ Student Edition Probeware Laboratory Manual‚ Teacher Edition Forensics Laboratory
Premium Force Velocity Mass
Kinematics / Projectiles x =?vt ?v = (v + vo)/2 v = vo + at x = vot + ½at2 v2 = vo2 + 2ax y =?vt ?v ’ ½(vo + v) v = vo – gt y = vot – ½gt2 v2= vo2 – 2gy R = (v02/g)sin(2θ) Forces Fnet = ma Fgravity = mg Ffriction ≤ μsN Ffriction = μkN Circular Motion Fnet = mv2/r ac = v2/r v = 2πr/T f = 1/T T = 1/f Gravitation F = GM1M2/R2 g = GM/R2 T2/R3 = 4π2/GM = constant GM = Rv2 Energy W = Fdcosθ KE
Premium
** Atom and Introduction to Nuclear physics ** Introduction Alpha-particle scattering 2.1 Experimental set-up ➢ Alpha particle o is a high-energy helium nucleus with 2 protons and 2 neutrons. o has 2 positive charges. ➢ Gold foil was chosen since it has a high atomic mass. Thin gold foil‚ ~10-6m was bombarded by high-energy alpha particles. ➢ Angular deflections/ scattering of alpha particles were measured by observing
Premium Neutron Atom Radioactive decay
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
Premium Orders of magnitude
conductivity of insulators is very low. SEMICONDUCTORS A semiconductor has electrical conductivity intermediate to that of a conductor and an insulator. Semiconductors differ from metals in their characteristic property of decreasing electrical resistivity with increasing temperature. The comprehensive theory of semiconductors relies on the principles of motion of electrons through a lattice of atoms. Current conduction in a semiconductor occurs via mobile or free electrons and holes‚ collectively
Premium Semiconductor
connection between electricity and magnetism. * When a current was switched on through a wire‚ it made a compass needle turn so that it was at right angles to the wire. * The current had produced a magnetic field strong enough to cause the compass needle to turn. Additional effects due to experiment * It was already known that an electric current in a wire has a heating effect‚ and may cause the wire to glow. This showed that the three phenomena of electricity‚ heat and light were connected
Premium Electromagnetism Electricity Magnetic field
he was many things)—an author‚ printer‚ politician‚ scientist‚ musician‚ inventor‚ and much‚ much more. He made significant contributions to many fields. However‚ he is probably best known for his work in science‚ especially in electricity and the physics of electricity. For the areas of science in which he worked‚ he is known for his studies in the theory of electricity and his useful inventions. These include the Franklin stove‚ bifocal eyeglasses‚ the lightning rod‚ and daylight savings time. One
Premium Electric charge Benjamin Franklin Lightning
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;
Premium Eye
The features of spoken language often changes depending on a number of factors; one of which includes the location and of whom they are speaking with. In the popular TV series‚ The Wire‚ the audience is introduced to the first transcript set in a deprived area of Baltimore where many of the street jargon slang and social accent is prominent. In comparison‚ language that is used in a courtroom of the second transcript is far more formal than street language. In the first transcript the purpose of
Premium Question Dialect Working class