Astronomers now think that there is a black hole with more than 4 million times the mass of our Sun at the center of our Galaxy. Roughly how large would the event horizon of such a supermassive black hole be

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?

Abicycle slows down when the rider applies the brakes. what type of energy transformation is involved in this example? a. kinetic energy into heat energy b. heat energy into potential energy c. potential energy into kinetic energy d. kinetic energy into mechanical energy

In general what determines whether atoms will form chemical bonds?