In the theory of special relativity, the lorentz contraction formula l=l01−v2/c2√ expresses the length l of an object as a function of its velocity v with respect to an observer, where l0 is the length of the object at rest and c is the speed of light. find limv→c−l:

Asun-sized star will spend most of its lifetime as a: white dwarf red giant protostar main-sequence star

Aforce of 240.0 n causes an object to accelerate at 3.2 m/s2. what is the mass of the object?

Ablock of mass m = 2.5 kg is attached to a spring with spring constant k = 710 n/m. it is initially at rest on an inclined plane that is at an angle of θ = 23° with respect to the horizontal, and the coefficient of kinetic friction between the block and the plane is μk = 0.19. in the initial position, where the spring is compressed by a distance of d = 0.16 m, the mass is at its lowest position and the spring is compressed the maximum amount. take the initial gravitational energy of the block as zero. a) what is the block's initial mechanical energy? b) if the spring pushes the block up the incline, what distance, l, in meters will the block travel before coming to rest? the spring remains attached to both the block and the fixed wall throughout its motion.