What is the tension on a rope causing a 7.50 kg box to accelerate to the right at 4.00 m/s^2 across a frictionless surface

The sun generates both mechanical and electromagnetic waves. which statement about those wave is true?

Acompound machine is also called a machine. a. force b. simple c. complex d. directional

Física: un futbolista patea hacia el arco con una velocidad de 15m/ah, calcular: a)el alcance para un ángulo de tiro de 25? , b) el tiempo que el balón permanece en el aire.