OCR Physics A G484: 20th June 2016Watch
awww yiss its that time of year again
Time: 9:00 am
The Frontiers of physics thread can be found here
(Earth: radius: 6400km, mass= 6x10^24kg
Moon: radius: 1740km, mass 7.4x10^22, distance from Earth: 3.8x10^8m)
Using the data provided at the start of the homework questions calculate:
a) The Earth's gravitational field strength at the moon
b) The gravitational force exerted by the Earth on the moon
c) The magnitude of the Moons acceleration towards the Earth
Is c) just same answer as a), or is it the answer of for a) and b) added together?
Does anyone know if mass has an effect on any aspect of simple harmonic motion like the frequency, amplitude. etc Thanks for any help
Whats the rule on sig figs? Does your answer have to be the same number of sig figs as the values used in the question (almost always 2) or can we leave it as 3? Tend to find I'm losing marks because I'm carrying my exact answer forward in the following questions that involves the value I previously calculated...
Mine is moles.. Can one of you please just explain moles please. That would be great.
Place all of the apparatus in the thermally insulated container with a lid. Use an electronic mass balance to measure and record the mass of liquid in the beaker. Place thermometer into liquid to measure the initial temperature or you can use a temperature sensor and datalogger. Attach an Ammeter in series and a Voltmeter in parallel to an ELECTRICAL heater. Using an electronic stopwatch, measure the time taken for a given temperature rise. Change in temperature = Tf - Ti. As P=IV, W=IVT and as W=MC^T, C = W/M^T = IVT/M^T.