Consider the situation where two speakers facing the same direction are two metres apart. The speakers are in phase, that is, they are producing exactly the same frequency and their movements are exactly synchronised with each other. The two speakers are separate sources of sound waves that diffract at the speaker aperture and then constructively and destructively interfere with each other. What name is given to the points where constructive interference occurs?

(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?

Discuss how the hardness or softness of the landing surface is related to the time required to stop the egg

You charge a parallel-plate capacitor, remove it from the battery, and prevent the wires connected to the plates from touching each other. when you increase the plate separation, what happens to the following quantities?