Determine the speed of light in fused quartz if fused quartz has an index of refraction of 1.46.

Which type of electromagnetic waves are dangerous enough to be used to kill cancerous cells? (a)gamma rays (b)visible light (c)infrared light (d)microwaves

True or false: the cycle of seasons on the earth is caused by the tilt of the earth on its axis toward and away from the sun.

At time t=0, a particle is located at the point (3,6,9). it travels in a straight line to the point (5,2,7), has speed 8 at (3,6,9) and constant acceleration 2i−4j−2k. find an equation for the position vector of the particle.