You are using a co source labeled as having the activity of 3.7 x 1010 counts/second in 1945. what is this source's current activity? (the half-lfe of 0co is 5.271 years.)

Which of the following changes will result in a stronger electromagnet? a. using fewer coils of wire b. using a higher voltage c. using a shorter nail d. using a longer wire

The cerebellum controls? thirst sensations sleep-wake cycles hand-eye coordination heart rate and pulse

An ice-making machine inside a refrigerator operates in a carnot cycle. it takes heat from liquid water at 0.0 degrees celsius and rejects heat to a room at a temperature of 19.2 degrees celsius. suppose that liquid water with a mass of 76.3kg at 0.0 degrees celsius is converted to ice at the same temperature. take the heat of fusion for water to be l_f = 3.34*10^5 j/kg.how much energy e must be supplied to the device? express your answer in joules.