15. When vector A is added to vector B, which has a magnitude of 5.0, the vector
representing their sum is perpendicular to A and has a magnitude that is twice
that of A. What is the magnitude of A?

Orque can be calculated by multiplying the force (n) applied at 90? to the lever arm at a distance (m) from the pivot point (point of rotation), the compound si unit for the torque is n? m. if the force (at 90? to the lever arm) applied is 15 n and it is applied at 2.0 m from the pivot point (point of rotation), what is the torque on the lever?

Curious carl calculated the density of a cube to be 4.50 g/cm3. what is the density of the cube in g/l?

Abeam of electrons with of wavelength of 7.5 x 10-6 m is incident on a pair of narrow rectangular slits separated by 0.75 mm. the resulting interference pattern is projected onto a screen 10.0 m from the slits. what is the separation of the interference maxima in the resulting interference pattern?