Un patinador se dirige hacia el norte por una ciclorruta rectacon una velocidad inicial de 8 m/s y a los 3 segundos aumenta su velocidad hasta 12 m/s.¿Cuál es su aceleración?

If the force applied to an object remains constant, is more power needed for the object to move faster ? explain

Asmall electric heater, immersed in 80g of water in a calorimeter of 40j/k raises the temperature from 10.5 degree celsius to 25 degree celsius in 12 minutes. using the same apparatus with 50g of oil instead of water, it is found that the temperature of oil rises from 7 degree celsius to 27 degree celsius in 10 minutes. find specific heat capacity of the oil.

Suppose that two objects attract each other with a gravitational force of 16 units. if the distance between the two objects is double, what is the new force of attraction between the two objects?