2. The circuit shown below is Wheatstone bridge used to determine the value of an unknown resistor X by comparison with three resistors M, N, and P whose resistances can be varied.
For each setting, the resistance of each resistor is precisely known. With switches K1 and K2
closed, these resistors are varied until the current in the galvanometer G is zero; the bridge is
then said to be balanced. (a) If the galvanometer G shows zero deflection when M = 850.0 Ω,
N = 15.00 Ω, and P = 33.48 Ω, what is the unknown resistance X?
Fig.

For a particular reaction, ? h = -144.6 kj and ? s = -301.2 j/k. calculate ? g for this reaction at 298 k.

We will use a video to study faraday’s law of electromagnetic induction by analyzing the induction that occurs due a coil of copper wire sliding along an air track that passes through an external magnetic field. specifically, we will: examine some of the main principles behind faraday’s law. apply lenz’s law to determine the direction of the induced emf. take measurements of the induced emf from the voltmeter as the coil passes into and out of the external magnetic field. use the horizontal scale provided to determine the speed of the coil. calculate the magnetic field induced in the coil as it passes into and out of the external magnetic field.

Atemperature inversion can cause a warm air mass to move over a colder air mass. this traps the colder air mass and prevents surface air from rising. this may result in which of these? a) smog b) acid rain c) freezing rain d) a thunderstorm