What happens when an electrical gradient and a chemical gradient are applying opposite forces to active transport?               a.  they negate each other.    b.  they triple the strength of each other.    c.  they strengthen each other.    d.  they weaken the power of each gradient by half.

Aparticle initially moving east with a speed of 20.0 m/s, experiences an acceleration of 3.95 m/s, north for a time of 8.00 s. what was the speed of the particle after this acceleration, in units of m/s? give the answer as a positive number.

Unpolarized light falls on two polarizer sheets whose transmission axes are at right angles. a third polarizer is placed between the first two so that its axis makes a 52-degree angle with the axis of the first polarizer. a) what fraction of the incident light intensity is transmitted through the first polaroid? b) what fraction of the incident light intensity is transmitted through the second polaroid? c) what is the angle of polarization of the light that enters the third polaroid? d) what fraction of the incident light intensity is transmitted through the third polaroid. e) what happens if the middle polaroid is removed?

When you hold a rectangular object, how does the area of the side that is resting on your hand affect the pressure and the force that the object exerts?