1. Una caja de madera de 29 kg se desliza por una superficie de madera que está inclinada en un ángulo de 37 grados por encima de la horizontal.

What would the difference of spectral lines emitted by hydrogen gas in distant galaxies which is normally found at a wavelength of 21 cm on earth, be observed at 21.1 centimeters?

The slotted link is pinned at o, and as a result of rotation it drives the peg p along the horizontal guide. compute the magnitude of the velocity and acceleration of p along the horizontal guide. compute the magnitudes of the velocity and acceleration of p as a function of θ if θ=(3t) rad, where t is measured in seconds.

Because light travels in a straight line and casts a shadow, isaac newton hypothesized that light is