Large amounts of 65zn are produced in copper exposed to accelerator beams. while machining contaminated copper, a physicist ingests 45.0 µci of 65zn. each 65zn decay emits an average γ-ray energy of 0.550 mev, 40.0% of which is absorbed in the scientist's 60.0 kg body. what dose in msv is caused by this in one day?

Which of the following represents an upside-down image?

Arowboat passenger uses an oar to push the boat off the dock by exerting a force of 40n for 3.0s. what impulse acts on the boat.

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?