¿Cuál es el ángulo de rotación (en grados) entre las dos manecillas de un reloj, si el radio del reloj es 0,70metro y la longitud del arco que separa las dos manos es 1.0metro por fa les agradecería mucho

How many neutrons does element x if it’s atomic number is 28 and its mass number is 87

What is the efficiency of an engine that does 80 j of work and exhausts 320 j of heat while taking in 400 j of heat ? a. 10% b. 20% c. 80% d. 25%

Two horses begin at rest. after a few seconds, horse a is traveling with a velocity of 10 m/s west, while horse b is traveling with a velocity of 13 m/s west. which horse had a greater acceleration? a. horse a because its change in velocity was greater than horse b's in the same time. b. horse b because its change in velocity was greater than horse a's in the same time. c. horse b because its change in velocity was the same as horse a's, but it took less time. d. both horses had the same acceleration.