Physics Homework Aid

Physics holds significant importance among the natural sciences, elucidating life's wonders and ranking among the most challenging subjects to master.

QuestionAI is a rich and user-friendly physics problem solver for novice physicists, enabling exploration of atomic properties and interactions, alongside molecular trajectories under various forces. Furthermore, you can delve into the mysteries concealed amidst galaxies with fellow physics enthusiasts. Boldly pose your conjectures and queries to the AI, and authoritative answers will readily emerge.

Resistance, potential difference and electrical current are expressed in the same order as units of: ohms, volts, amperes ohms, watts, amperes ohms, volts, watts watts, volts, ohms

A motor produces an output of 1.2kW when the input is 14kW; its efficiency is: 85.7% 75.7% 65.7% 55.7%

13 of 40 A conductor of a simple alternator is 0.4 m long and cuts a magnetic field with a magnetic flux density of 1.5 Tesla at a velocity of 30m/s . The EMF induced in the conductor will be: A 1,800 V B ) 18 V C 180V D 1.8V

The initial temperature of the mixture was +20^circ C The mixture froze at -1.5^circ C A total of 165 kJ of internal energy was transferred from the mixture to cool and freeze it. specific heat capacity of the mixture=3500J/kg^circ C specific latent heat of fusion of the mixture=255000J/kg Calculate the mass of the mixture. Give your answer to 2 significant figures. [6 mark

2.The displacement of a mass is given by the function y=sin3t The tasks are to: a) Draw a graph of the displacement y(m) against time t(s) for the time t=0s to t=2.s b) Identify the position of any turning points and whether they are maxima minima or points of inflexion. c) Calculate the turning points of the function using differential calculus and show which are maxima minima or points of inflexion by using the second derivative. Compare your results from parts b and c.