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  1. M

    Thoughts on these two stimuli for a discursive?

    'Sometimes, you read a book and it fills you with this weird evangelical zeal, and you become convinced that the shattered world will never be put back together unless and until all living humans read the book.' 'We are survivors, of each other. We have been shark to one another, but also...
  2. M

    Induced Emf/ Magnetic Flux

    There's that example used to describe how magnetic fields can actually create current using Faraday's experiment How does opening and closing the switch change the magnetic field? Is it because of the battery? I don't understand how opening or closing it could change the magnetic field unless...
  3. M

    Magnetism problem

    Estimate the field the loop creates by calculating the field at the center of a circular loop 20.0 cm in diameter carrying 5.00 A. (a) What is the smallest field strength this loop can be used to measure, if its field must alter the measured field by less than 0.0100%?
  4. M

    Torque Problem

    By how many percent is the torque of a motor decreased if its permanent magnets lose 5.0% of their strength? (b) How many percent would the current need to be increased to return the torque to original values?
  5. M

    Magnetism Problem

    The force on the rectangular loop of wire in the magnetic field in Figure 8 can be used to measure field strength. The field is uniform, and the plane of the loop is perpendicular to the field. (a) What is the direction of the magnetic force on the loop? Justify the claim that the forces on...
  6. M

    Magnetism Problem

    An electron in a TV CRT moves with a speed of 6.0x10^7 ms, in a direction perpendicular to the Earth’s field, which has a strength of 5.00x10^-5 a) What strength electric field must be applied perpendicular to the Earth’s field to make the electron move in a straight line? b) If this is done...
  7. M

    Buffer Calculation

    A 5.36g sample of NH4CI was added to 25.0mL of 1.00M NaOH and the resulting solution diluted to 0.100 L. a): What is the pH of the solution b): Is the solution acidic or basic c): What is the pH of a solution that results when 3.00mL of 0.034M HCI is added to the solution
  8. M

    Buffer Calculation

    a) Calculate the pH of an acetate buffer that is a mixture with 0.10 M acetic acid and 0.10 M sodium acetate. b) Calculate the pH after 1.0 mL of 0.10 NaOH is added to 100mL of this buffer I got part a right but i don’t understand part b
  9. M

    Electromagnetism problem

    Two parallel conducting plates are separated by 10cm, and one of them is taken to be at zero volts. What is the electric field strength between them, if the potential 8.00cm from the zero volt plate (2.00cm from the other) is 450V? How does one of the plates being taken as zero volts affect things?
  10. M

    Acid Base Problem

    I don’t rlly get this question. What does percent solution by mass mean? And how does the density relate to the working out? Novocaine, C13H21O2N2CI, is the salt of the base procaine and HCI. The ionisation constant is 7x10^-6. Is a solution of novocaine acidic or basic? Furthermore, what are...
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