Two cars are traveling along perpendicular roads, car a at 40 mi/hr, car b at 60 mi/hr. at noon, when car a reaches the intersection, car b is 90 mi away, and moving toward it. at 1 p. m. the distance between the cars is changing, in miles per hour, at the rate of:

50 g of ice at 0°c is dropped in a beaker containing 100 g of water at 0°c. what will be the contents of the beaker after 5 hours? assume that the room temperature is 0°c.

Awater balloon launcher uses an elastic band with a spring constant of 115 n/m to use thee launcher you stretch thee band back with a balloon n it the water balloons have a mass of 1.3 kg a) if you stretch the band by 0.8 m, what elastic force will the band exert? b) with the band stretched 0.8 m, how much elastic potential energy is stored in the spring? c) if you release the band, it pushes forward. what is the kinetic energy of the balloon when it reaches the natural length of the band? d) what is the speed of the balloon when it reaches the natural length of the band?

What happens to an isotope during radioactive decay?