Granny whizzes around a skating rink and is suddenly confronted with little Ambrose at rest directly in her path. Rather than knock him over, Granny picks him up and continues in motion without "braking". According to the Law of Conservation of Momentum...

Work = force × a. work b. energy c. distance d. momentum

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?

Could we see a galaxy that is 20 billion light-years away?