Un disco de \( 1,0 \mathrm{~kg} \) desliza hacia la derecha sobre una superficie horizontal rugosa, con coeficiente de roce \( \mathrm{u}_{\mathrm{k}}=0,25 \). Cuando el disco tiene una rapidez \( v_{0}=3,0 \frac{\mathrm{~m}}{\mathrm{~s}} \) entra en contacto con un resorte de constante \( \mathrm{K}=50 \mathrm{~N} / \mathrm{m} \). El disco se detiene después que el resorte se ha comprimido una distancia x , para luego ser impulsado hacia la izquierda. Determine la distancia comprimida.

Use the formula \( s=r \omega t \) to find the value of the missing variable. \( s=\frac{4 \pi}{5} \mathrm{~km}, r=5 \mathrm{~km}, t=1 \mathrm{sec} \)

What requirements must be met for a nuclear fu- sion reaction to occur? A select all that apply. A extremely low temperatures C extremely high temperatures D a large amount of pressure

Nuclear fission and nuclear fusion are important nuclear processes that result in a change in the nucleus of isotopes. (a) Compare nuclear fission and nuclear fusion, and explain two similarities be- tween them. (b) Describe two ways nuclear fission and nuclear fusion differ regarding require- ments for reactions and applications. You can start your response with: - Nuclear fission and nuclear fusion are similar in that they both ... - Two ways in which nuclear fusion differs from nuclear fission are...

Cuando la luz golpea la frontera entre dos medios, pueden ocurrir: Seleccione una: a. Absorción b. Todas son correctas. c. Reflexión d. Refracción

What is the force on a 1000 kg elevator that is falling freely at \( 9.8 \mathrm{~m} / \mathrm{sec}^{2} ? \)