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Part A A sample of 1.5x1010 atoms that decay by alpha emission has a half-life of 70 min How many alpha particles are emitted be

Part A A sample of 1.5x1010 atoms that decay by alpha emission has a half-life of 70 min How many alpha particles are emitted between t = 50 min and t = 200 min? Express your answer using two significant figures. ? IVO AO Na =

Part A A sample of 1.5x1010 atoms that decay by alpha emission has a half-life of 70 min How many alpha particles are emitted between t = 50 min and t = 200 min? Express your answer using two significant figures. ? IVO AO Na =

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P3: Compute the average surface temperature of Mars by balancing the incoming radiation energy from the Sun with the energy re-radiated outwards. Useful data Surface Temperature of Sun: Ts = 5800 K Radius of Sun: rs = 7.0 x 10 km Radius of Mars: 'm = 3400 km Rotation period of Mars: ty = 24.6 h Average distance from Sun to Mars: dm = 2.3x108 km Surface area of a sphere: A = 47tr2