Dois blocos A e B, de massas respectivamente iguais a 20 kg e 5 kg, estão apoiados em uma superfície horizontal perfeitamente lisa, conforme apresentado na figura abaixo. Uma força constante e horizontal de intensidade 50N passa a atuar sobre o bloco A. Determine: a) a aceleração adquirida pelo sistema
b) a intensidade da força que o bloco A exerce no bloco B

The speed of light in a material is 0.50 c. what is the critical angle of a light ray at the interface between the material and a vacuum?

Astudent is performing an experiment comparing sound and light waves. the student gathers the following data. what conclusion does the student most likely make based on this data? light waves always travel the same speed; however, the speed of sound is determined by the medium that it travels through. all sound waves always have the same energy, so the temperature of the medium does not affect wave speed. light needs to vibrate particles, so it travels fastest in tightly packed solids, while sound does not need a medium, so it travels fastest in a gas. tightly packed particles in solids slow down the light waves; however, sound waves make particles bounce into each other, so they travel faster in solids.

Select all that applywhat are some basic resources a family is expected to provide for children? educationclothesspending