an object experiences forces of 13N to the north and 28N to the east. What is the magnitude of net external force acting on this object?

The image shows a pendulum in simple harmonic motion the pendulum starts at a and swing to e

True or false when elements combine to form a mixture, the resulting chemical properties may be very different from those of the elements that make it.

Suppose you have three polarizing filters, with the second at an angle of 42∘ to the first and the third at an angle of 90∘ to the first. by what perfect will the original intensity of unpolarized light be reduced to after passing through all three filters?