What is an example of where the Instantaneous Velocity would change throughout a trip?

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

At an oceanside nuclear power plant, seawater is used as part of the cooling system. this raises the temperature of the water that is discharged back into the ocean. the amount that the water temperature is raised has a uniform distribution over the interval from 10° to 25° c. what is the standard deviation of the temperature increase?

Atomic nuclei of almost all elements consist of