Original activity of the sample
A drug tagged with 9943Tc (half-life = 6.05 h) is prepared for a patient. If the original activity of the sample was 2.0 104 Bq, what is its activity (R) after it has been on the shelf for 2.0 h?
Expected delivery within 24 Hours
A 8.3 kg stone at rest on a spring. The spring is compressed 11 cm by the stone. The stone is then pushed down an additional 26 cm and released. To what maximum height (in cm) does the stone rise from that position?
A block or aluminum with a mass of 1 kg is placed in a container filled with water to the brim. The water oerflows. The same is dont with a 1 kg of lead. Does the block of lead displace more, less or the same amount of water as the aluminume block
A 64 kg boy and a 40 kg girl use an elastic rope while engaged in a tug-of-war on a frictionless icy surface. If the acceleration of the girl toward the boy is 2.9 m/s2, determine the magnitude of the acceleration of the boy toward the girl.
Give a counter example to show that the following statement is false: When the magnetic field through a loop changes, currents run in the loop in such a way as to make a new magnetic field in the opposite direction to the original one.
If the spring in such a setup is compressed by 0.051 m, what is the coefficient of static friction?
If a four-engine jet accelerates down the runway at 2 m/s2 and one of the jet engines fails, how much acceleration will the other three produce?
Two ants race acroos a table 74 cm long. One travles at4.64 cm/s, and the other at 3.99999 cm/s. when the first one crosses the finish line, how far behind is the second one? Answer in units of cm.
A rectangular air mattress is 2.0 m long, 0.50 m wide, and 0.08 m thick. If it has a mass of 2.0 kg, what additional mass can it support in water?
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