O scândură din lemn de brad cu densitatea 0,6 g/cm3 cântărește 66 g. Știind că scândura are lungimea 50 cm și grosimea 1 cm, calculează lățimea ei.

4. if you were an astronaut on the moon, what would you experience? what would you see from your perspective?

Two balls, each with a mass of 0.5 kg, collide on a pool table. is the law of conservation of momentum satisfied in the collision? explain why or why not

Would it be correct to say the doppler effect is the apparent change in the speed of a wave due to the motion of the source? be sure to fully explain your position using at least 3 complete content related sentences.