A small cart is rolling at constant velocity vo on a flat track. As it continues to move, a launcher, fixed onto the cart, fires a marble straight up into the air when the end of the launching barrel is passing point
i, as shown in the figure. If the launching barrel reaches the position of point ii when the marble returns
to the same vertical position that it was launched from, what will be its horizontal position? (Assume air
resistance is neglible)

The membrane surrounding a living cell consists of an inner and an outer wall that are separated by a small space. assume that the membrane acts like a parallel plate capacitor in which the effective charge density on the inner and outer walls has a magnitude of 7.0 × 10-6 c/m2. (a) what is the magnitude of the electric field within the cell membrane? (b) find the magnitude of the electric force that would be exerted on a potassium ion (k+; charge = +e) placed inside the membrane.

Which statement is best supported by the information in the chart? wave y is moving the fastest. wave x is moving the fastest. all of the waves are moving at the same speed. all of the waves have the same value of wavelengths per second.

You can decrease the resistance of a length of wire by