A3-ohm resistor and a 6-ohm resistor are
connected in parallel across a 9-volt battery.
which statement best compares the potential
difference across each resistor?
(1) the potential difference across the 6-ohm
resistor is the same as the potential
difference across the 3-ohm resistor.
(2) the potential difference across the 6-ohm
resistor is twice as great as the potential
difference across the 3-ohm resistor.
(3) the potential difference across the 6-ohm
resistor is half as great as the potential
difference across the 3-ohm resistor.
(4) the potential difference across the 6-ohm
resistor is four times as great as the potential
difference across the 3-ohm resistor.

During takeoff, the sound intensity level of a jet engine is 170db at a distance of 34 m. what's the sound intensity level at a distance of 1.0 km?

Part f - example: finding two forces (part i) two dimensional dynamics often involves solving for two unknown quantities in two separate equations describing the total force. the block in (figure 1) has a mass m=10kg and is being pulled by a force f on a table with coefficient of static friction îľs=0.3. four forces act on it: the applied force f (directed î¸=30â above the horizontal). the force of gravity fg=mg (directly down, where g=9.8m/s2). the normal force n (directly up). the force of static friction fs (directly left, opposing any potential motion). if we want to find the size of the force necessary to just barely overcome static friction (in which case fs=îľsn), we use the condition that the sum of the forces in both directions must be 0. using some basic trigonometry, we can write this condition out for the forces in both the horizontal and vertical directions, respectively, as: fcosî¸â’îľsn=0 fsinî¸+nâ’mg=0 in order to find the magnitude of force f, we have to solve a system of two equations with both f and the normal force n unknown. use the methods we have learned to find an expression for f in terms of m, g, î¸, and îľs (no n).

Suppose an objects initial velocity is 10m/s and it’s final velocity is 4 m/s. mass is constant. what can best be concluded about the object based in the work-energy theorem