A stretched wire of length 24cm when plucked produces a note of
the same frequency as that of a fork
of frequency 256Hz. If the wire is
then adjusted to 16cm and the
tension kept constant, calculate the
frequency of the fork which will be
in tune with the wire.​

In a given chemical reaction, the energy of the products is greater than the energy of the reactants. which statement is true for this reaction?

(2) (a) you have a simple circuit that consists of only a battery (δvbat=1.5v) and two resistors with resistance r1=10ω and r2=5ω, connected in series with each other. what is the current running through the battery? (b) you re-arrange your circuit so now r2 is attached in parallel to r1 rather than in series. what is the current running through the battery? (c) you add an additional resistor r3=7ω on the same branch as r2. what is the current running through the battery? (d) what is the power dissipated in r3?

When is a current produced? when the terminals of an electrochemical cell are connected by a wire if the electric circuit is opened in an electrochemical cell if the electrolyte is removed from an electrochemical cell when the electrodes are reversed in an electrochemical cell