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Yes, you could do the calculation that way. If the object has half it's final velocity then it has a quarter of its final kinetic energy, and therefore it has lost a quarter of its gravitational potential energy, so it has fallen 1/4 x 50 metres, and it is 37.5 metres above the ground.

@kkk579 In question 6 (c) you performed a calculation based on energy. The correct way to calculate the height is to use v2 =u2 +2as Make v = 15.65 m/s, let u =0 and rearranging terms we can say S = 15.652 / 2 x 9.8 and the answer is 12.49 m

Question 15 (a) is also badly worded. I think what the examiner meant to say was, "Draw the force-vector diagram at the point Y." If you answer the question literally, the free-body diagram for the mass A is trivial, as @kkk579 has shown, although quantifying the forces is not quite so trivial...

There is no correct answer. All the options are false. The best way to analyse this force-time graph is to recognise that the area under the force-time graph is equal to the Impulse, which is also equal to the Change of Momentum. Break the graph into three regular shapes, a triangle, a...

Where does it say that the loop is moving? The loop isn't moving. You need to practice reading exam questions carefully and answering exactly the question you are given, not the question that you have memorised.

You could investigate the film "Lawrence of Arabia" directed by David Lean. You could investigate the works of Leni Riefenstahl.

Yes, almost certainly if your degree is from a respected Australian University you won't have a problem. Accreditation is all about the planning and execution by the University. It's not you that needs to be accredited. It's the faculty, their curriculum, their assessment practices and their...

Geez, this is a wacko question. Where did you get it? One way to solve the problem is to treat it as a lumped system. Determine the total moving mass of the system, determine the net force on the system, and from that work out the acceleration of the whole system. Then knowing the acceleration...

Accreditation matters if you are looking to have your qualifications recognised by a Professional Engineering Institution (such as IE Aust or the American Nuclear Society) and it might have an effect if you apply for a post-grad placement overseas. As far as entering the workforce goes, it would...

Module 1 is "Properties of Matter" and it includes flame tests of different ionic solutions of metals, and spectral evidence supporting the Bohr model of the atom. I suppose you could ask a student to recount a first-hand investigation of flame test for potassium ions and copper ions. Recall the...

I think you could say, "Planck showed that there was a decreasing intensity of radiation for frequency f > kT/h because radiant energy was quantized according to E = hf and if E >>kT then it could not be emitted."

Good questions - this shows you are really engaging. (i) Something I didn't mention before it is extremely unlikely that all the oscillators will have exactly the average energy kT. Entropy will make sure that this doesn't happen. There is a spread of energies or a distribution function for...

Firstly, let's clear up your description of the "classical" intensity distribution function. The "classical" intensity distribution function was derived by Lord Rayleigh and Sir James Jeans around 1905 - 1910. This function plots the intensity (watts per square metre per steradian) versus...

Reynolds 853 is a low-carbon steel alloy containing manganese, chromium, molybdenum, copper and silicon. 853 tubes are manufactured in very thin wall thicknesses, like 0.5 mm to 0.4 mm. They are weldable by conventional tungsten-inert-gas (TIG) welding and gas-metal-arc-welding (GMAW). Tubes are...

Have you thought about Mining Engineering? There are plenty of jobs and they pay way above market rates for good people.

dy/dx (x) is proportional to the magnitude of instantaneous vertical component of velocity of the projectile. It will have a magnitude of zero at the point of inflection when the projectile achieves it's maximum altitude.

LASER stands for Light Amplification by Stimulated Emission of Radiation. LASER devices are monochromatic by nature because the light amplification effect only occurs at one particular photon energy and one particular photon wavelength. The photons that are emitted are coherent and monochromatic.

I think you are right. However, this is a weird question. To construct an electrochemical cell you would normally construct it from two half-cells. Each half-cell would contain a metal electrode in equilibrium with a solution of its own ions. The two half-cells would be connected by a...

There are 70 ways to select 4 members from a set of 8. However not all of these are proper words. I can find 19 words that are proper words in the English language (not counting repeats like "labs"): slay subs Susy Yass lass lays labs ally ably bays ball bass buys bull busy slab slay Saul says

To create an animated GIF you need to design each frame of the animation. For smooth motion you could be looking at designing 50 frames. Whatever GIF animation software you choose, you still need to create the images before you can assemble them into the finished filmstrip, so you need to find...